Index Ventures

Index Ventures is a venture capital firm established in 1996, with offices in London, San Francisco, and Geneva. It specializes in investing in high technology and life sciences, focusing on sectors such as artificial intelligence, machine learning, fintech, healthcare, and media. The firm aims to support entrepreneurs in transforming innovative ideas into successful global businesses. Notable companies in which Index Ventures has invested include Adyen, Deliveroo, Dropbox, Farfetch, King, Slack, and Supercell. Through its various funds, Index Ventures targets early-stage and later-stage investments, primarily in the software and technology sectors across Europe and North America.

Nina Achadjian

Partner and Investor

Julia Andre

Partner and Investor

Damir Becirovic

Partner

Sofia Dolfe

Principal, Partner

Paula Garcia Domingo

Partner and Investor

Juriaan Duizendstraal

Partner and Investor

Zabie Elmgren

Partner

Mark Fiorentino

Partner and Investor

Giacomo Genzini

Partner and Investor

Mark Goldberg

Partner

Bastian Hasslinger

Partner and Investor

Paris Heymann

Partner and Investor

Jacob Jofe

Associate

Jack Kleeman

Partner

Stephane Kurgan

Partner

Adrianna C. Ma

Investor

Bryan Offut

Principal / Partner

Bryan Offutt

Partner and Investor

Shimin Ooi

Partner

Cyriac Parisot

VC Investor and Head of Data

Neil Rimer

Co-Founder and Investor

Danny Rimer

Partner

Susana Rojas

Partner and Investor

Hannah Seal

Principal / Partner

Kimihiko Shindo

General Partner

Nunu Tadesse

Director, Finance

Ishani Thakur

Partner and investor

Kelly Toole

Principal

Dominique Vidal

Venture Partner

Mike Volpi

Partner

Katharina Wilhelm

Principal, Partner

Catherine Wu

Partner and Investor

Cat Wu

Partner

Giuseppe Zocco

Co-Founder

Past deals in Open Source

Weaviate

Series B in 2023
SeMI Technologies is the company behind the open-source vector search engine Weaviate. SeMI offers products in the form of SaaS and PaaS licenses for Weaviate to a wide variety of industries.

Strapi

Series B in 2022
Strapi Solutions SAS is the developer of Strapi, an open-source content management framework built on Node.js that enables developers to create and manage APIs efficiently. Founded in 2016 and based in Paris, France, Strapi offers a headless CMS that separates the backend from the frontend, allowing developers to choose their preferred tools and frameworks for application development. The platform supports various use cases, including blogs, brand websites, and product catalogs, while providing a powerful dashboard for API management. Additionally, Strapi offers consulting and training services to assist customers in optimizing their use of the platform. With a focus on flexibility and ease of use, Strapi serves a global clientele, empowering developers to build robust back-end solutions with minimal effort.

Sourceful

Series A in 2022
Sourceful operates a packaging design platform focused on creating sustainable packaging solutions. The platform features a verified supplier network that allows brands to streamline their packaging processes while ensuring eco-friendly choices. Additionally, Sourceful provides data-driven design advice and life-cycle sustainability metrics to help businesses understand the environmental impact of their packaging decisions. By manufacturing and customizing its packages, Sourceful enables brands to adopt more sustainable practices in their supply chains.

Superconductive

Series B in 2022
Superconductive is the creator of Great Expectations, an open-source tool for data testing, documentation, and profiling. Great Expectations has a vibrant community where both core contributors and community members provide each other support through channels like Slack and Discuss. They offer paid consulting services to organizations that would benefit from closer collaboration with the core Great Expectations engineering team. It was created in 2017 and is headquartered in Redwood City, California.

SphereEx

Seed Round in 2022
SphereEx builds new distributed data infrastructures, by being fully committed to the open source community, the platform concept, and cutting-edge Big Data technological innovation. Our R&D efforts led to the success of ShardingSphere, a "platform, pluggable, cloud-native" distributed middleware solution ideal for large-scale data and data value-added applications. Our pioneering "Database Plus" and "Database Mesh" concepts are designed to unlock innovative data usage concepts, improve enterprise data applications, and easily respond to complex data scenarios. Following over 5 years of development, the ShardingSphere project has gained more than 13 thousand GitStars on GitHub, involving over 200 contributors, becoming one of the most popular open source projects. In April 2020, ShardingSphere successfully graduated from the Apache Incubator, and became an Apache Software Foundation Top-Level Project. More recently, ShardingSphere has also been recognized as a Cloud Native Computing Foundation (CNCF) Panorama project. To date, ShardingSphere has already been used in more than 160 enterprise and production environments covering the financial, logistics, O2O, internet & cloud computing fields, to help achieve enterprise digital transformation.

Cockroach Labs

Series F in 2021
Cockroach Labs, Inc. specializes in developing open-source database software, notably CockroachDB, which is a distributed SQL database tailored for modern cloud applications. Founded in 2015 and headquartered in New York, the company also has an office in Cambridge, Massachusetts. CockroachDB is designed to scale horizontally and can withstand various types of failures, including those at the disk, machine, rack, and datacenter levels, while maintaining minimal latency and no need for manual intervention. It supports strongly-consistent ACID transactions and offers an SQL API for data management. The software is suitable for diverse clients, ranging from startups to Fortune 500 companies, and is utilized for enterprise-grade disaster recovery services. CockroachDB combines the rich features of SQL with the scalability typically associated with NoSQL databases, enabling developers to innovate rapidly without compromising on consistency. The platform is trusted by major enterprises across various sectors, including finance, retail, and media.

Dagster Labs

Series A in 2021
Dagster Labs develops an open-source Python library known as Dagster, which serves as a data orchestration platform for building modern data applications. The platform facilitates collaboration among infrastructure engineers, data engineers, and data scientists, enabling them to efficiently process and produce trusted data. Dagster offers a user-friendly programming model for constructing data pipelines and workflows, designed to integrate smoothly with existing tools and systems. Its incrementally-adoptable architecture allows clients to leverage their current infrastructure while enhancing their data management capabilities.

ClickHouse

Series B in 2021
ClickHouse is an open-source, column-oriented online analytical processing (OLAP) database management system that enables users to generate real-time analytical reports using SQL queries. The system is designed for high-performance query processing, allowing enterprises to handle large volumes of data efficiently. By reducing storage requirements and processing significant amounts of data within short timeframes, ClickHouse offers a secure, reliable, and scalable solution for data management. This capability is particularly beneficial for organizations seeking to optimize their data analytics and streamline data processing workflows.

ClickHouse

Series A in 2021
ClickHouse is an open-source, column-oriented online analytical processing (OLAP) database management system that enables users to generate real-time analytical reports using SQL queries. The system is designed for high-performance query processing, allowing enterprises to handle large volumes of data efficiently. By reducing storage requirements and processing significant amounts of data within short timeframes, ClickHouse offers a secure, reliable, and scalable solution for data management. This capability is particularly beneficial for organizations seeking to optimize their data analytics and streamline data processing workflows.

Sourceful

Seed Round in 2021
Sourceful operates a packaging design platform focused on creating sustainable packaging solutions. The platform features a verified supplier network that allows brands to streamline their packaging processes while ensuring eco-friendly choices. Additionally, Sourceful provides data-driven design advice and life-cycle sustainability metrics to help businesses understand the environmental impact of their packaging decisions. By manufacturing and customizing its packages, Sourceful enables brands to adopt more sustainable practices in their supply chains.

Superconductive

Series A in 2021
Superconductive is the creator of Great Expectations, an open-source tool for data testing, documentation, and profiling. Great Expectations has a vibrant community where both core contributors and community members provide each other support through channels like Slack and Discuss. They offer paid consulting services to organizations that would benefit from closer collaboration with the core Great Expectations engineering team. It was created in 2017 and is headquartered in Redwood City, California.

Kong

Series D in 2021
Kong Inc is a cloud connectivity company specializing in application programming interfaces (APIs) and microservices. It offers a popular open-source API Gateway along with its enterprise solutions, which are designed to manage, monitor, and scale APIs effectively. The platform includes features such as API gateways, developer portals, and analytics tools, allowing development teams to distribute, monetize, manage, analyze, and utilize their APIs efficiently. Kong has received funding from prominent venture capital firms and notable investors, further solidifying its position in the industry.

Cockroach Labs

Series E in 2021
Cockroach Labs, Inc. specializes in developing open-source database software, notably CockroachDB, which is a distributed SQL database tailored for modern cloud applications. Founded in 2015 and headquartered in New York, the company also has an office in Cambridge, Massachusetts. CockroachDB is designed to scale horizontally and can withstand various types of failures, including those at the disk, machine, rack, and datacenter levels, while maintaining minimal latency and no need for manual intervention. It supports strongly-consistent ACID transactions and offers an SQL API for data management. The software is suitable for diverse clients, ranging from startups to Fortune 500 companies, and is utilized for enterprise-grade disaster recovery services. CockroachDB combines the rich features of SQL with the scalability typically associated with NoSQL databases, enabling developers to innovate rapidly without compromising on consistency. The platform is trusted by major enterprises across various sectors, including finance, retail, and media.

Stack Overflow

Series E in 2020
Stack Overflow Ltd operates an online community tailored for developers and technologists, facilitating knowledge sharing and problem-solving in programming. The company provides several key services, including Stack Overflow for Teams, which supports mission-critical knowledge management, and Stack Overflow for Talent and Jobs, a platform designed for hiring and employer branding solutions within technology sectors. Additionally, Stack Overflow Advertising enables businesses to promote products and enhance brand visibility. For larger organizations, Stack Overflow Enterprise offers a secure environment for sharing and accessing essential company information. Founded in 2008 and based in London, United Kingdom, Stack Overflow Ltd was previously known as Stack Exchange Ltd.

Gatsby

Series B in 2020
GatsbyJS is a React-based SSG that first debuted in 2015. Built by Kyle Mathews and fully open source, Gatsby upended the SSG ecosystem by combining best-practice front-end development techniques (route-based code splitting, PRPL, service workers, and offline support) with dynamic data integrations via a rich set of plugins (WordPress, Drupal, Contentful, MongoDB, etc.), queried at compile-time. Best of all was when Gatsby v1.0 shipped with connectors to PHP workhorse CMSs like Drupal and WordPress. Meaning that non-techies could still comfortably push content in the familiar way, while devs got to make use of React’s component model. Developers jumped on Gatsby like birthday kids on cupcakes: Gatsby is already in use by literally tens of thousands of developers, and downloaded nearly 500,000 times each month.

Strapi

Series A in 2020
Strapi Solutions SAS is the developer of Strapi, an open-source content management framework built on Node.js that enables developers to create and manage APIs efficiently. Founded in 2016 and based in Paris, France, Strapi offers a headless CMS that separates the backend from the frontend, allowing developers to choose their preferred tools and frameworks for application development. The platform supports various use cases, including blogs, brand websites, and product catalogs, while providing a powerful dashboard for API management. Additionally, Strapi offers consulting and training services to assist customers in optimizing their use of the platform. With a focus on flexibility and ease of use, Strapi serves a global clientele, empowering developers to build robust back-end solutions with minimal effort.

Cockroach Labs

Series D in 2020
Cockroach Labs, Inc. specializes in developing open-source database software, notably CockroachDB, which is a distributed SQL database tailored for modern cloud applications. Founded in 2015 and headquartered in New York, the company also has an office in Cambridge, Massachusetts. CockroachDB is designed to scale horizontally and can withstand various types of failures, including those at the disk, machine, rack, and datacenter levels, while maintaining minimal latency and no need for manual intervention. It supports strongly-consistent ACID transactions and offers an SQL API for data management. The software is suitable for diverse clients, ranging from startups to Fortune 500 companies, and is utilized for enterprise-grade disaster recovery services. CockroachDB combines the rich features of SQL with the scalability typically associated with NoSQL databases, enabling developers to innovate rapidly without compromising on consistency. The platform is trusted by major enterprises across various sectors, including finance, retail, and media.

Confluent

Series E in 2020
Confluent, Inc. develops a data platform that focuses on real-time data integration, stream processing, and analytics for various sectors, including organizations and government entities. The company's core offering is based on Apache Kafka, an open-source technology that serves as a scalable and fault-tolerant messaging system, allowing businesses to collect and utilize data from diverse sources such as user activities, application metrics, and logs. Confluent also provides several additional solutions, including Confluent Cloud, a managed streaming service that simplifies the development of streaming applications; Confluent Operator, which facilitates the management of Apache Kafka on Kubernetes; KSQL, an open-source streaming SQL engine for interactive queries; and ksqlDB, an event streaming database. Founded in 2014 and headquartered in Mountain View, California, Confluent has expanded its presence with multiple offices across the United States and internationally in locations such as the United Kingdom, Germany, Australia, and Singapore.

Linear

Seed Round in 2019
Linear allows the user to manage software development and track bugs. Built for speed and efficiency. The founders started Linear from their own frustrations building software projects in successful high-growth companies like Airbnb, Coinbase and Uber. The founders wanted to create the tools that focus us and its team in making progress, not get in the way. Tools that are fast and efficient. Speed and performance were the main things Linear focuses on early on and keep focusing on that.

Cockroach Labs

Series C in 2019
Cockroach Labs, Inc. specializes in developing open-source database software, notably CockroachDB, which is a distributed SQL database tailored for modern cloud applications. Founded in 2015 and headquartered in New York, the company also has an office in Cambridge, Massachusetts. CockroachDB is designed to scale horizontally and can withstand various types of failures, including those at the disk, machine, rack, and datacenter levels, while maintaining minimal latency and no need for manual intervention. It supports strongly-consistent ACID transactions and offers an SQL API for data management. The software is suitable for diverse clients, ranging from startups to Fortune 500 companies, and is utilized for enterprise-grade disaster recovery services. CockroachDB combines the rich features of SQL with the scalability typically associated with NoSQL databases, enabling developers to innovate rapidly without compromising on consistency. The platform is trusted by major enterprises across various sectors, including finance, retail, and media.

Kong

Series C in 2019
Kong Inc is a cloud connectivity company specializing in application programming interfaces (APIs) and microservices. It offers a popular open-source API Gateway along with its enterprise solutions, which are designed to manage, monitor, and scale APIs effectively. The platform includes features such as API gateways, developer portals, and analytics tools, allowing development teams to distribute, monetize, manage, analyze, and utilize their APIs efficiently. Kong has received funding from prominent venture capital firms and notable investors, further solidifying its position in the industry.

Confluent

Series D in 2019
Confluent, Inc. develops a data platform that focuses on real-time data integration, stream processing, and analytics for various sectors, including organizations and government entities. The company's core offering is based on Apache Kafka, an open-source technology that serves as a scalable and fault-tolerant messaging system, allowing businesses to collect and utilize data from diverse sources such as user activities, application metrics, and logs. Confluent also provides several additional solutions, including Confluent Cloud, a managed streaming service that simplifies the development of streaming applications; Confluent Operator, which facilitates the management of Apache Kafka on Kubernetes; KSQL, an open-source streaming SQL engine for interactive queries; and ksqlDB, an event streaming database. Founded in 2014 and headquartered in Mountain View, California, Confluent has expanded its presence with multiple offices across the United States and internationally in locations such as the United Kingdom, Germany, Australia, and Singapore.

EveryTeam

Seed Round in 2018
At EveryTeam, we believe it's time to rebuild the way teams organize shared content. We're focusing on the same principles that made GitHub the go-to collaborative workspace for engineering teams, with a repository that extends to every team's content. Our product creates trust and accountability within every team by helping teams know what’s important and find what’s relevant, increasing trust and reliability in both their shared content and in their team.

Cockroach Labs

Series B in 2017
Cockroach Labs, Inc. specializes in developing open-source database software, notably CockroachDB, which is a distributed SQL database tailored for modern cloud applications. Founded in 2015 and headquartered in New York, the company also has an office in Cambridge, Massachusetts. CockroachDB is designed to scale horizontally and can withstand various types of failures, including those at the disk, machine, rack, and datacenter levels, while maintaining minimal latency and no need for manual intervention. It supports strongly-consistent ACID transactions and offers an SQL API for data management. The software is suitable for diverse clients, ranging from startups to Fortune 500 companies, and is utilized for enterprise-grade disaster recovery services. CockroachDB combines the rich features of SQL with the scalability typically associated with NoSQL databases, enabling developers to innovate rapidly without compromising on consistency. The platform is trusted by major enterprises across various sectors, including finance, retail, and media.

Kong

Series B in 2017
Kong Inc is a cloud connectivity company specializing in application programming interfaces (APIs) and microservices. It offers a popular open-source API Gateway along with its enterprise solutions, which are designed to manage, monitor, and scale APIs effectively. The platform includes features such as API gateways, developer portals, and analytics tools, allowing development teams to distribute, monetize, manage, analyze, and utilize their APIs efficiently. Kong has received funding from prominent venture capital firms and notable investors, further solidifying its position in the industry.

Confluent

Series C in 2017
Confluent, Inc. develops a data platform that focuses on real-time data integration, stream processing, and analytics for various sectors, including organizations and government entities. The company's core offering is based on Apache Kafka, an open-source technology that serves as a scalable and fault-tolerant messaging system, allowing businesses to collect and utilize data from diverse sources such as user activities, application metrics, and logs. Confluent also provides several additional solutions, including Confluent Cloud, a managed streaming service that simplifies the development of streaming applications; Confluent Operator, which facilitates the management of Apache Kafka on Kubernetes; KSQL, an open-source streaming SQL engine for interactive queries; and ksqlDB, an event streaming database. Founded in 2014 and headquartered in Mountain View, California, Confluent has expanded its presence with multiple offices across the United States and internationally in locations such as the United Kingdom, Germany, Australia, and Singapore.

Cockroach Labs

Series A in 2016
Cockroach Labs, Inc. specializes in developing open-source database software, notably CockroachDB, which is a distributed SQL database tailored for modern cloud applications. Founded in 2015 and headquartered in New York, the company also has an office in Cambridge, Massachusetts. CockroachDB is designed to scale horizontally and can withstand various types of failures, including those at the disk, machine, rack, and datacenter levels, while maintaining minimal latency and no need for manual intervention. It supports strongly-consistent ACID transactions and offers an SQL API for data management. The software is suitable for diverse clients, ranging from startups to Fortune 500 companies, and is utilized for enterprise-grade disaster recovery services. CockroachDB combines the rich features of SQL with the scalability typically associated with NoSQL databases, enabling developers to innovate rapidly without compromising on consistency. The platform is trusted by major enterprises across various sectors, including finance, retail, and media.

SourceClear

Series A in 2015
SourceClear, Inc. develops security tools for software developers. It develops technologies to help software developers build safe and secure applications. It provides SourceClear online portal, where users can analyze the various issues identified by SourceClear; SourceClear Registry, a resource for users to explore SourceClear’s database of open-source libraries along with the list of vulnerabilities discovered and curated by SourceClear researchers; and SourceClear Scanning Agents such as command line interface and plugins for build and package managers. The company offers DevOps and Continuous Delivery, which creates feedback loop and learning, visualizing how code runs on our infrastrucuture, and maintaining a healthy balance of bleeding edge practices between operations and developers. The users can choose to use SourceClear on their desktop and/or with their continuous integration server. The company was founded in 2012 and is headquartered in San Francisco, California with an additional office in Singapore. As of April 9, 2018, SourceClear, Inc. operates as a subsidiary of Veracode, Inc.

Gitter

Seed Round in 2015
Gitter is an open-source chat and networking platform based in London, United Kingdom, designed to facilitate the management, growth, and connection of communities through messaging and content discovery. It provides users with instant messaging services that simplify community collaboration, allowing for easy organization and expansion of groups. The platform integrates with various tools such as GitHub, Trello, and Jenkins, enhancing its functionality for developers. Gitter's mission focuses on connecting developers to foster strong relationships among peers and with the technologies they utilize.

Confluent

Series B in 2015
Confluent, Inc. develops a data platform that focuses on real-time data integration, stream processing, and analytics for various sectors, including organizations and government entities. The company's core offering is based on Apache Kafka, an open-source technology that serves as a scalable and fault-tolerant messaging system, allowing businesses to collect and utilize data from diverse sources such as user activities, application metrics, and logs. Confluent also provides several additional solutions, including Confluent Cloud, a managed streaming service that simplifies the development of streaming applications; Confluent Operator, which facilitates the management of Apache Kafka on Kubernetes; KSQL, an open-source streaming SQL engine for interactive queries; and ksqlDB, an event streaming database. Founded in 2014 and headquartered in Mountain View, California, Confluent has expanded its presence with multiple offices across the United States and internationally in locations such as the United Kingdom, Germany, Australia, and Singapore.

Minio

Seed Round in 2015
Minio, Inc. is a company that specializes in developing a minimal object storage server compatible with Amazon S3 APIs. Founded in 2014 and based in Palo Alto, California, Minio provides a solution for cloud-native applications that can operate seamlessly across both public and private clouds. The company's flagship product is designed to function on a single server and supports various storage backends, including donut, filesystem, and in-memory storage. Additionally, Minio hosts a play server for public use, allowing developers and system administrators to familiarize themselves with S3-compatible object storage. Minio's offerings are released under the Apache License v2, emphasizing its commitment to open-source solutions in the realm of multi-cloud object storage.

Stack Exchange

Venture Round in 2015
Stack Exchange Inc. operates a diverse network of question-and-answer websites covering a wide range of topics, including software programming, cooking, photography, and gaming. The platform enables users to ask and answer questions without the need for registration, fostering an open community for knowledge sharing. Among its offerings is Stack Overflow for Teams, which provides development teams with a dedicated space to seek answers to technical inquiries. The company serves a variety of professionals, including programmers, researchers, and photographers. Founded in 2008 and originally known as Stack Overflow, Inc., it rebranded to Stack Exchange Inc. in March 2011 and is headquartered in New York, New York.

Stack Overflow

Series D in 2015
Stack Overflow Ltd operates an online community tailored for developers and technologists, facilitating knowledge sharing and problem-solving in programming. The company provides several key services, including Stack Overflow for Teams, which supports mission-critical knowledge management, and Stack Overflow for Talent and Jobs, a platform designed for hiring and employer branding solutions within technology sectors. Additionally, Stack Overflow Advertising enables businesses to promote products and enhance brand visibility. For larger organizations, Stack Overflow Enterprise offers a secure environment for sharing and accessing essential company information. Founded in 2008 and based in London, United Kingdom, Stack Overflow Ltd was previously known as Stack Exchange Ltd.

Secret

Series B in 2014
Secret offers an online platform that enables users to share their personal secrets with other users anonymously. It owns and operates a mobile application that helps users to share and connect with friends. The company was founded in 2015 and is headquartered in San Francisco, California.

Elastic

Series C in 2014
Elastic develops the open-source Elastic Stack, which includes Elasticsearch, Kibana, Beats, and Logstash, along with X-Pack, offering additional commercial features. The company also provides Elastic Cloud, a fully hosted and managed solution that supports search, logging, and analytics in a scalable and reliable manner. With over 250 million cumulative downloads, the Elastic Stack serves thousands of organizations, including notable names like Cisco, eBay, Goldman Sachs, NASA, and The New York Times, facilitating critical functions such as data search, logging, metrics, and security. Elastic is backed by significant investment from firms such as Benchmark Capital and Index Ventures, and it operates with more than 900 employees across 30 countries.

Hortonworks

Series D in 2014
Hortonworks, Inc. specializes in data management platforms, services, and solutions across North America, Europe, Asia Pacific, and Latin America. The company is best known for its Hortonworks Data Platform (HDP), an open-source framework that facilitates the distributed storage and processing of large datasets. Hortonworks also offers Hortonworks DataFlow, a platform for real-time streaming analytics that helps organizations gain insights from their data. Additionally, the Hortonworks DataPlane Service (DPS) supports data management and governance across hybrid environments. The company provides various solutions, including a cybersecurity platform for real-time security analytics and tools for stream processing. Hortonworks is recognized for its training and support services and has a significant presence in industries such as healthcare, finance, and telecommunications. Founded in 2011 and headquartered in Santa Clara, California, Hortonworks operates as a subsidiary of Cloudera as of January 2019.

SoundCloud

Series D in 2014
SoundCloud is a social sound platform that enables users to create, upload, and share audio content, including music. Launched in 2008 by Alexander Ljung and Eric Wahlforss, it serves as a hub for a diverse community of creators and listeners. The platform allows sound creators to instantly record and distribute their works while providing them with detailed statistics and feedback from the community. SoundCloud connects artists with their fans globally, facilitating the promotion and sharing of music through blogs, websites, and social networks. This open platform not only helps artists distribute their work but also enhances the music discovery experience for users.

Secret

Seed Round in 2013
Secret offers an online platform that enables users to share their personal secrets with other users anonymously. It owns and operates a mobile application that helps users to share and connect with friends. The company was founded in 2015 and is headquartered in San Francisco, California.

Kong

Series A in 2013
Kong Inc is a cloud connectivity company specializing in application programming interfaces (APIs) and microservices. It offers a popular open-source API Gateway along with its enterprise solutions, which are designed to manage, monitor, and scale APIs effectively. The platform includes features such as API gateways, developer portals, and analytics tools, allowing development teams to distribute, monetize, manage, analyze, and utilize their APIs efficiently. Kong has received funding from prominent venture capital firms and notable investors, further solidifying its position in the industry.

Hortonworks

Series C in 2013
Hortonworks, Inc. specializes in data management platforms, services, and solutions across North America, Europe, Asia Pacific, and Latin America. The company is best known for its Hortonworks Data Platform (HDP), an open-source framework that facilitates the distributed storage and processing of large datasets. Hortonworks also offers Hortonworks DataFlow, a platform for real-time streaming analytics that helps organizations gain insights from their data. Additionally, the Hortonworks DataPlane Service (DPS) supports data management and governance across hybrid environments. The company provides various solutions, including a cybersecurity platform for real-time security analytics and tools for stream processing. Hortonworks is recognized for its training and support services and has a significant presence in industries such as healthcare, finance, and telecommunications. Founded in 2011 and headquartered in Santa Clara, California, Hortonworks operates as a subsidiary of Cloudera as of January 2019.

Elastic

Series B in 2013
Elastic develops the open-source Elastic Stack, which includes Elasticsearch, Kibana, Beats, and Logstash, along with X-Pack, offering additional commercial features. The company also provides Elastic Cloud, a fully hosted and managed solution that supports search, logging, and analytics in a scalable and reliable manner. With over 250 million cumulative downloads, the Elastic Stack serves thousands of organizations, including notable names like Cisco, eBay, Goldman Sachs, NASA, and The New York Times, facilitating critical functions such as data search, logging, metrics, and security. Elastic is backed by significant investment from firms such as Benchmark Capital and Index Ventures, and it operates with more than 900 employees across 30 countries.

OpenX

Series E in 2013
OpenX Limited, based in Pasadena, California, specializes in digital advertising technology that assists businesses in managing ad revenue. Through its subsidiary, the company operates one of the largest and highest quality ad exchanges, enabling brands to deliver relevant advertising at a global scale. OpenX's technology aggregates and analyzes consumer interests in real time, ensuring that marketers effectively reach their target audiences. The platform supports over 30,000 recognized brands, 1,200 websites, and 2,000 premium mobile apps, providing insights into audience dynamics and facilitating efficient ad planning and purchasing across multiple screens. Additionally, OpenX offers an open-source ad server solution that allows publishers to access various ad networks, thereby reducing reliance on specific services like Google AdSense.

Pentaho

Series C in 2012
Pentaho Corporation is a data integration and business analytics company that specializes in providing an open-source platform for big data applications. Founded in 2004 and headquartered in Orlando, Florida, with an additional office in Tokyo, Japan, Pentaho offers a comprehensive suite of tools that enable organizations to analyze, visualize, and report on data from various sources. Its platform includes capabilities for data extraction, preparation, and blending, as well as embedded analytics solutions that integrate with applications and processes. Pentaho serves a diverse range of industries, including healthcare, retail, financial services, and government, and has a global presence with over 1,200 enterprise customers. The company also provides consulting, training, and support services, emphasizing its commitment to helping organizations leverage their data for improved decision-making and operational efficiency. As a recognized leader in the field, Pentaho is known for its stewardship of key open-source analytics projects, such as Kettle, Weka, and Mondrian.

Hortonworks

Series B in 2011
Hortonworks, Inc. specializes in data management platforms, services, and solutions across North America, Europe, Asia Pacific, and Latin America. The company is best known for its Hortonworks Data Platform (HDP), an open-source framework that facilitates the distributed storage and processing of large datasets. Hortonworks also offers Hortonworks DataFlow, a platform for real-time streaming analytics that helps organizations gain insights from their data. Additionally, the Hortonworks DataPlane Service (DPS) supports data management and governance across hybrid environments. The company provides various solutions, including a cybersecurity platform for real-time security analytics and tools for stream processing. Hortonworks is recognized for its training and support services and has a significant presence in industries such as healthcare, finance, and telecommunications. Founded in 2011 and headquartered in Santa Clara, California, Hortonworks operates as a subsidiary of Cloudera as of January 2019.

Kong

Seed Round in 2011
Kong Inc is a cloud connectivity company specializing in application programming interfaces (APIs) and microservices. It offers a popular open-source API Gateway along with its enterprise solutions, which are designed to manage, monitor, and scale APIs effectively. The platform includes features such as API gateways, developer portals, and analytics tools, allowing development teams to distribute, monetize, manage, analyze, and utilize their APIs efficiently. Kong has received funding from prominent venture capital firms and notable investors, further solidifying its position in the industry.

OpenX

Series D in 2011
OpenX Limited, based in Pasadena, California, specializes in digital advertising technology that assists businesses in managing ad revenue. Through its subsidiary, the company operates one of the largest and highest quality ad exchanges, enabling brands to deliver relevant advertising at a global scale. OpenX's technology aggregates and analyzes consumer interests in real time, ensuring that marketers effectively reach their target audiences. The platform supports over 30,000 recognized brands, 1,200 websites, and 2,000 premium mobile apps, providing insights into audience dynamics and facilitating efficient ad planning and purchasing across multiple screens. Additionally, OpenX offers an open-source ad server solution that allows publishers to access various ad networks, thereby reducing reliance on specific services like Google AdSense.

Stack Overflow

Series B in 2011
Stack Overflow Ltd operates an online community tailored for developers and technologists, facilitating knowledge sharing and problem-solving in programming. The company provides several key services, including Stack Overflow for Teams, which supports mission-critical knowledge management, and Stack Overflow for Talent and Jobs, a platform designed for hiring and employer branding solutions within technology sectors. Additionally, Stack Overflow Advertising enables businesses to promote products and enhance brand visibility. For larger organizations, Stack Overflow Enterprise offers a secure environment for sharing and accessing essential company information. Founded in 2008 and based in London, United Kingdom, Stack Overflow Ltd was previously known as Stack Exchange Ltd.

SoundCloud

Series B in 2011
SoundCloud is a social sound platform that enables users to create, upload, and share audio content, including music. Launched in 2008 by Alexander Ljung and Eric Wahlforss, it serves as a hub for a diverse community of creators and listeners. The platform allows sound creators to instantly record and distribute their works while providing them with detailed statistics and feedback from the community. SoundCloud connects artists with their fans globally, facilitating the promotion and sharing of music through blogs, websites, and social networks. This open platform not only helps artists distribute their work but also enhances the music discovery experience for users.

catchfree

Series A in 2011
CatchFree is an online platform designed to assist users in finding and comparing the best free solutions tailored to their specific needs. By systematically organizing feedback from active users, CatchFree provides valuable insights into the performance of various products, enabling informed decision-making. The platform focuses on simplifying the search process for effective online tools, making it easier for individuals and businesses to identify suitable options without incurring costs.

Gluster

Series B in 2010
Gluster specializes in open source, distributed file systems designed to manage and store unstructured data efficiently. Its software allows enterprises to scale storage solutions to several petabytes while accommodating numerous clients. By enabling organizations to consolidate numerous commodity storage and compute resources, Gluster creates a high-performance, virtualized, and centrally managed storage pool. The company's technology has been adopted by various industries, including media, healthcare, consumer internet, energy, and biotech, and is recognized for its scalability and performance. Key features of Gluster's offerings include a global namespace, an elastic hash algorithm, and an elastic volume manager. Headquartered in Sunnyvale, California, Gluster remains privately held and continues to serve hundreds of global enterprises and service providers.

Cloud.com

Series B in 2010
Cloud.com is a venture-backed startup located in Cupertino that specializes in developing open source cloud orchestration software. The company's primary product, CloudStack, facilitates the creation and management of both public and private cloud computing environments, enabling service providers and enterprises to deploy Infrastructure as a Service (IaaS) offerings akin to those of major cloud platforms. CloudStack is available in three versions: the Enterprise Edition, the Service Provider Edition, and the open-source Community Edition. The company rebranded from VMOps to Cloud.com in May 2010 as it emerged from stealth mode, positioning itself as a key player in the cloud computing sector.

OpenX

Series C in 2009
OpenX Limited, based in Pasadena, California, specializes in digital advertising technology that assists businesses in managing ad revenue. Through its subsidiary, the company operates one of the largest and highest quality ad exchanges, enabling brands to deliver relevant advertising at a global scale. OpenX's technology aggregates and analyzes consumer interests in real time, ensuring that marketers effectively reach their target audiences. The platform supports over 30,000 recognized brands, 1,200 websites, and 2,000 premium mobile apps, providing insights into audience dynamics and facilitating efficient ad planning and purchasing across multiple screens. Additionally, OpenX offers an open-source ad server solution that allows publishers to access various ad networks, thereby reducing reliance on specific services like Google AdSense.

Gluster

Series A in 2008
Gluster specializes in open source, distributed file systems designed to manage and store unstructured data efficiently. Its software allows enterprises to scale storage solutions to several petabytes while accommodating numerous clients. By enabling organizations to consolidate numerous commodity storage and compute resources, Gluster creates a high-performance, virtualized, and centrally managed storage pool. The company's technology has been adopted by various industries, including media, healthcare, consumer internet, energy, and biotech, and is recognized for its scalability and performance. Key features of Gluster's offerings include a global namespace, an elastic hash algorithm, and an elastic volume manager. Headquartered in Sunnyvale, California, Gluster remains privately held and continues to serve hundreds of global enterprises and service providers.

Dimdim

Series B in 2008
Dimdim offers a browser based web conferencing service based on the open source platform. Users can download the open source code and install it to their servers. Attendees are not required to download any software to host or attend a meeting. Dimdim allows presenters to share their desktops, show slides, as well as talk, listen, chat, and broadcast via webcam.

OpenX

Series B in 2007
OpenX Limited, based in Pasadena, California, specializes in digital advertising technology that assists businesses in managing ad revenue. Through its subsidiary, the company operates one of the largest and highest quality ad exchanges, enabling brands to deliver relevant advertising at a global scale. OpenX's technology aggregates and analyzes consumer interests in real time, ensuring that marketers effectively reach their target audiences. The platform supports over 30,000 recognized brands, 1,200 websites, and 2,000 premium mobile apps, providing insights into audience dynamics and facilitating efficient ad planning and purchasing across multiple screens. Additionally, OpenX offers an open-source ad server solution that allows publishers to access various ad networks, thereby reducing reliance on specific services like Google AdSense.

OpenX

Series A in 2007
OpenX Limited, based in Pasadena, California, specializes in digital advertising technology that assists businesses in managing ad revenue. Through its subsidiary, the company operates one of the largest and highest quality ad exchanges, enabling brands to deliver relevant advertising at a global scale. OpenX's technology aggregates and analyzes consumer interests in real time, ensuring that marketers effectively reach their target audiences. The platform supports over 30,000 recognized brands, 1,200 websites, and 2,000 premium mobile apps, providing insights into audience dynamics and facilitating efficient ad planning and purchasing across multiple screens. Additionally, OpenX offers an open-source ad server solution that allows publishers to access various ad networks, thereby reducing reliance on specific services like Google AdSense.

Dimdim

Series A in 2007
Dimdim offers a browser based web conferencing service based on the open source platform. Users can download the open source code and install it to their servers. Attendees are not required to download any software to host or attend a meeting. Dimdim allows presenters to share their desktops, show slides, as well as talk, listen, chat, and broadcast via webcam.

SourceLabs

Venture Round in 2006
SourceLabs is a provider of a set of tools and services used to support open source software like Linux. The company sells subscriptions for enterprise support, maintenance, and upgrades for open source software, including SASH, offers a proprietary Open Source Management System and is also behind the wiki website SWiK, a community project that documents open source software.

Pentaho

Series B in 2006
Pentaho Corporation is a data integration and business analytics company that specializes in providing an open-source platform for big data applications. Founded in 2004 and headquartered in Orlando, Florida, with an additional office in Tokyo, Japan, Pentaho offers a comprehensive suite of tools that enable organizations to analyze, visualize, and report on data from various sources. Its platform includes capabilities for data extraction, preparation, and blending, as well as embedded analytics solutions that integrate with applications and processes. Pentaho serves a diverse range of industries, including healthcare, retail, financial services, and government, and has a global presence with over 1,200 enterprise customers. The company also provides consulting, training, and support services, emphasizing its commitment to helping organizations leverage their data for improved decision-making and operational efficiency. As a recognized leader in the field, Pentaho is known for its stewardship of key open-source analytics projects, such as Kettle, Weka, and Mondrian.

AllPeers

Series A in 2006
AllPeers is an open-source software extension for the Mozilla Firefox browser that allows users to share files, folders, web page images, and links from right within their Firefox browsers using P2P (peer-to-peer) technology. The AllPeers Navigator enables users to maintain contacts, chat, and share items with the people on their lists. Users can include a subject line and a text message when sharing items. When other users share items with them, a notification appears in the bottom right hand corner of their browser window. The ""add a contact"" button lets users import contacts from Gmail, Hotmail, Outlook, and more. Files, folders, and images that users wish to share can be dragged and dropped into the Share window. Links to web pages can be shared by dragging and dropping the page's browser tab into the Share window. Download location and bandwidth speed can be set using the toolbar's Preferences button. AllPeers was launched by Cedric Maloux and Matthew Gertner and is operated from Oxford, United Kingdom.

Pentaho

Series A in 2005
Pentaho Corporation is a data integration and business analytics company that specializes in providing an open-source platform for big data applications. Founded in 2004 and headquartered in Orlando, Florida, with an additional office in Tokyo, Japan, Pentaho offers a comprehensive suite of tools that enable organizations to analyze, visualize, and report on data from various sources. Its platform includes capabilities for data extraction, preparation, and blending, as well as embedded analytics solutions that integrate with applications and processes. Pentaho serves a diverse range of industries, including healthcare, retail, financial services, and government, and has a global presence with over 1,200 enterprise customers. The company also provides consulting, training, and support services, emphasizing its commitment to helping organizations leverage their data for improved decision-making and operational efficiency. As a recognized leader in the field, Pentaho is known for its stewardship of key open-source analytics projects, such as Kettle, Weka, and Mondrian.

QT Group

Series B in 2005
Qt Group Oyj is a software company headquartered in Espoo, Finland, that specializes in developing, productizing, and licensing software development tools under both commercial and open-source licenses. The company offers a robust framework of libraries and tools, known as Qt, which enables developers to create applications and user interfaces for desktop, embedded, and mobile platforms. Qt is widely utilized in various sectors, including consumer electronics, automotive, industrial automation, and healthcare, serving clients across over 70 industries globally. In addition to its development framework, Qt Group provides professional services such as consulting, training, and technical support, helping customers optimize their software solutions. With a presence in multiple countries, including Germany, the United States, Japan, and China, the company supports a large community of developers worldwide, enhancing the versatility and reach of its technology.

SourceLabs

Series A in 2004
SourceLabs is a provider of a set of tools and services used to support open source software like Linux. The company sells subscriptions for enterprise support, maintenance, and upgrades for open source software, including SASH, offers a proprietary Open Source Management System and is also behind the wiki website SWiK, a community project that documents open source software.

MySQL

Series B in 2003
MySQL is an open-source database management system that facilitates scalable web-based and embedded applications. Established in 1995 by David Axmark and Michael Widenius, it is headquartered in Cupertino, California. MySQL offers a range of products, including enterprise-level support packages with full service assistance, alongside free downloads of its latest software versions. The platform features various resources such as forums, articles, documentation, and podcasts to support its user community. MySQL's software is designed to enhance business agility, providing scalability, security, reliability, and uptime, while also offering services like network monitoring and database clustering architecture. This comprehensive approach helps organizations optimize their database management and reduce operational costs.
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