Kleiner Perkins is a venture capital firm based in Menlo Park, California, founded in 1972. The firm specializes in investing in early-stage, growth, and incubation companies across a range of industries, including business products, consumer services, financial services, healthcare, information technology, and life sciences. Kleiner Perkins partners with entrepreneurs from the inception of their ideas through to their initial public offerings, aiming to maximize the potential of innovative concepts. The firm has a global investment focus, engaging with founders in the United States, Canada, the Middle East, the United Kingdom, and Mainland China. It is recognized for its strategic support of bold ideas and its commitment to fostering growth in various sectors.
Chainguard specializes in supply chain security by providing hardened, minimal container images that are continuously rebuilt from source in secure environments. These images are designed to eliminate known vulnerabilities and ensure end-to-end integrity, featuring built-in cryptographic signatures, Software Bill of Materials (SBOMs), and Supply-chain Levels for Software Artifacts (SLSA) provenance. In addition to its container images, Chainguard offers a catalog of guarded Java dependencies through its Chainguard Libraries, which are also built securely from source in SLSA-certified infrastructure. The company emphasizes its commitment to the open source community by contributing to and maintaining several widely used open source projects. By applying zero-trust principles and utilizing compliant-build systems, Chainguard enables businesses to effectively manage their supply chain security risks throughout the software lifecycle.
Nexthop AI
Series A in 2025
Nexthop AI develops AI infrastructure and custom networking solutions for large cloud operators, focusing on enhancing operational efficiency and connectivity within complex network environments. The company offers a range of services, including network automation, data management, and analytics, enabling clients to optimize their network performance and streamline their operations. Through its innovative solutions, Nexthop AI addresses the challenges faced by cloud operators, providing tools that facilitate seamless integration and scalability in dynamic computing environments. Additionally, Nexthop AI emphasizes compatibility with open-source network operating systems, allowing clients to leverage existing technologies while implementing advanced networking strategies.
Together AI
Series B in 2025
Together AI is a cloud-based platform designed for constructing open-source generative AI and infrastructure for developing AI models. The company contributes cutting-edge open-source research, models, and datasets to push the boundaries of AI forward. Through its decentralized cloud services, developers and researchers at organizations of various scales are empowered to train, refine, and deploy generative AI models.
Together AI
Series A in 2024
Together AI is a cloud-based platform designed for constructing open-source generative AI and infrastructure for developing AI models. The company contributes cutting-edge open-source research, models, and datasets to push the boundaries of AI forward. Through its decentralized cloud services, developers and researchers at organizations of various scales are empowered to train, refine, and deploy generative AI models.
Together AI
Series A in 2023
Together AI is a cloud-based platform designed for constructing open-source generative AI and infrastructure for developing AI models. The company contributes cutting-edge open-source research, models, and datasets to push the boundaries of AI forward. Through its decentralized cloud services, developers and researchers at organizations of various scales are empowered to train, refine, and deploy generative AI models.
Open Raven
Series B in 2022
Open Raven, Inc. is a data security company that specializes in data protection by developing a platform aimed at assessing and managing data risk for enterprises. Founded in 2019 and based in Los Angeles, California, the company helps organizations identify and secure sensitive data stored across cloud environments and corporate networks. Its platform provides visibility and control to prevent data breaches, locating assets and highlighting exposed data and shadow accounts. Open Raven's solution addresses the limitations of existing tools by effectively managing data security posture, ensuring that security teams can locate and protect sensitive information within vast data environments. The platform also offers pre-built connectors and an open-source model for easier integration and extensibility, thus enabling businesses to maintain compliance and safeguard their data effectively.
Bun
Seed Round in 2022
Oven is a new JavaScript runtime designed for speed with an integrated native bundler, test runner, and package manager that is compatible with npm. is meant to be a drop-in replacement for Node.js to run the majority of JavaScript outside of browsers, improving infrastructure speed and complexity while increasing developer productivity with better, simpler tooling.
Prisma
Series B in 2022
Prisma is a company focused on providing app developers with tools to build scalable applications more efficiently through an open-source database toolkit. Founded in 2016, Prisma aims to democratize access to advanced data infrastructure typically utilized by large technology firms. The company offers a data platform that includes a query builder and a GraphQL application programming interface, allowing developers to access and manipulate data seamlessly. Its tools support operations such as filtering, sorting, pagination, and real-time capabilities, enabling users to navigate and edit their data with ease and safety. With offices in Berlin and San Francisco, Prisma has attracted investment from reputable venture capital firms.
RudderStack
Series B in 2022
RudderStack, Inc. is an enterprise customer data infrastructure platform founded in 2019 and headquartered in San Francisco, California. The company specializes in collecting, storing, and routing customer event data from various applications and websites to data warehouses and cloud applications. RudderStack offers an open-source solution that enables businesses to consolidate and activate customer data across teams and tools. Its platform allows users to easily deploy data pipelines, facilitating the collection of customer data from multiple sources, including SaaS platforms. Additionally, RudderStack provides a transformation framework that processes event data on the fly, thereby assisting engineers, product managers, data scientists, and marketers in deriving valuable insights and enhancing overall growth.
PlanetScale
Series C in 2021
PlanetScale, Inc. is a technology company that specializes in an online database platform designed to help businesses manage and gain insights from their data efficiently. Founded in 2018 and headquartered in Mountain View, California, PlanetScale offers a MySQL-compatible, serverless database solution built on the scalable architecture of Vitess, which is used by major platforms like YouTube and Slack. The company's services include a Database-as-a-Service platform, cluster manager software, open-source Vitess support, and training solutions. PlanetScaleDB enhances operational capabilities by providing features such as disaster recovery, data locality solutions, and the ability to manage database scaling without downtime. This combination allows development teams to improve workflow velocity and performance while ensuring reliable access to their data.
RudderStack
Series A in 2021
RudderStack, Inc. is an enterprise customer data infrastructure platform founded in 2019 and headquartered in San Francisco, California. The company specializes in collecting, storing, and routing customer event data from various applications and websites to data warehouses and cloud applications. RudderStack offers an open-source solution that enables businesses to consolidate and activate customer data across teams and tools. Its platform allows users to easily deploy data pipelines, facilitating the collection of customer data from multiple sources, including SaaS platforms. Additionally, RudderStack provides a transformation framework that processes event data on the fly, thereby assisting engineers, product managers, data scientists, and marketers in deriving valuable insights and enhancing overall growth.
Athens Research
Seed Round in 2021
Athens Research operates a private and extensible knowledge graph designed for research and notetaking. It is developed as an open-source alternative to Roam Research, emphasizing community-driven contributions. The platform allows users to organize, connect, and access information efficiently, fostering collaboration and enhancing productivity in research activities. By providing a flexible and user-friendly environment, Athens Research supports individuals and teams in managing their knowledge more effectively.
Prisma
Series A in 2020
Prisma is a company focused on providing app developers with tools to build scalable applications more efficiently through an open-source database toolkit. Founded in 2016, Prisma aims to democratize access to advanced data infrastructure typically utilized by large technology firms. The company offers a data platform that includes a query builder and a GraphQL application programming interface, allowing developers to access and manipulate data seamlessly. Its tools support operations such as filtering, sorting, pagination, and real-time capabilities, enabling users to navigate and edit their data with ease and safety. With offices in Berlin and San Francisco, Prisma has attracted investment from reputable venture capital firms.
Open Raven
Series A in 2020
Open Raven, Inc. is a data security company that specializes in data protection by developing a platform aimed at assessing and managing data risk for enterprises. Founded in 2019 and based in Los Angeles, California, the company helps organizations identify and secure sensitive data stored across cloud environments and corporate networks. Its platform provides visibility and control to prevent data breaches, locating assets and highlighting exposed data and shadow accounts. Open Raven's solution addresses the limitations of existing tools by effectively managing data security posture, ensuring that security teams can locate and protect sensitive information within vast data environments. The platform also offers pre-built connectors and an open-source model for easier integration and extensibility, thus enabling businesses to maintain compliance and safeguard their data effectively.
CodeSandbox
Seed Round in 2019
CodeSandbox is an online code editing platform that simplifies the process of building and sharing web applications for developers. It enables creators to express and validate their ideas with code while eliminating the complexities associated with setting up development environments and tools. With over 2 million monthly users, including prominent organizations like Shopify, Atlassian, and Stripe, CodeSandbox has facilitated the creation of more than 10 million applications since its inception. The platform is also widely adopted in the open-source community, supporting projects such as React, Vue, and Babel. By streamlining the coding process, CodeSandbox empowers software developers to focus on their projects without the time-consuming task of configuring their coding environments.
Prisma
Seed Round in 2018
Prisma is a company focused on providing app developers with tools to build scalable applications more efficiently through an open-source database toolkit. Founded in 2016, Prisma aims to democratize access to advanced data infrastructure typically utilized by large technology firms. The company offers a data platform that includes a query builder and a GraphQL application programming interface, allowing developers to access and manipulate data seamlessly. Its tools support operations such as filtering, sorting, pagination, and real-time capabilities, enabling users to navigate and edit their data with ease and safety. With offices in Berlin and San Francisco, Prisma has attracted investment from reputable venture capital firms.
CoreOS
Series B in 2016
CoreOS, Inc. is a technology company that specializes in open source projects for Linux containers and Internet security software solutions. Founded in 2012 and based in San Francisco, with additional offices in New York City and a development hub in Berlin, CoreOS is recognized for its contributions to the Kubernetes community. The company offers Tectonic, an enterprise-ready platform that enhances Kubernetes with features for secure container orchestration, and Quay, a private image registry for building, storing, and distributing containers. CoreOS also provides CoreUpdate, a tool for managing application updates, and maintains various open source projects, including CoreOS Linux, etcd, and rkt. These solutions address key challenges related to downtime, security, and resilience, enabling organizations to run their applications reliably in diverse environments. In 2018, CoreOS became a subsidiary of Red Hat, further bolstering its position in the cloud infrastructure landscape.
AT&T CyberSecurity
Series E in 2015
AT&T Cybersecurity specializes in providing comprehensive security solutions tailored for mid-market enterprises facing modern security threats. The company offers a suite of products encompassing cyber strategy and risk, identity and fraud management, network and endpoint security, as well as threat detection and response. Key offerings include managed threat detection, unified security management for managed security service providers (MSSPs), and the AlienVault USM platform, which aids in threat detection, incident response, and compliance management. Additionally, AT&T Cybersecurity features the Open Threat Exchange, fostering collaboration among security professionals by sharing actionable threat intelligence. The company serves a diverse range of sectors, including education, healthcare, finance, and retail, ensuring that organizations can effectively manage their security needs without excessive complexity or costs. Founded in 2007 and headquartered in San Mateo, California, AT&T Cybersecurity operates as a subsidiary of AT&T Communications, LLC. The company also has offices in Ireland, Spain, Australia, and Texas.
CoreOS
Series A in 2015
CoreOS, Inc. is a technology company that specializes in open source projects for Linux containers and Internet security software solutions. Founded in 2012 and based in San Francisco, with additional offices in New York City and a development hub in Berlin, CoreOS is recognized for its contributions to the Kubernetes community. The company offers Tectonic, an enterprise-ready platform that enhances Kubernetes with features for secure container orchestration, and Quay, a private image registry for building, storing, and distributing containers. CoreOS also provides CoreUpdate, a tool for managing application updates, and maintains various open source projects, including CoreOS Linux, etcd, and rkt. These solutions address key challenges related to downtime, security, and resilience, enabling organizations to run their applications reliably in diverse environments. In 2018, CoreOS became a subsidiary of Red Hat, further bolstering its position in the cloud infrastructure landscape.
CoreOS
Series A in 2014
CoreOS, Inc. is a technology company that specializes in open source projects for Linux containers and Internet security software solutions. Founded in 2012 and based in San Francisco, with additional offices in New York City and a development hub in Berlin, CoreOS is recognized for its contributions to the Kubernetes community. The company offers Tectonic, an enterprise-ready platform that enhances Kubernetes with features for secure container orchestration, and Quay, a private image registry for building, storing, and distributing containers. CoreOS also provides CoreUpdate, a tool for managing application updates, and maintains various open source projects, including CoreOS Linux, etcd, and rkt. These solutions address key challenges related to downtime, security, and resilience, enabling organizations to run their applications reliably in diverse environments. In 2018, CoreOS became a subsidiary of Red Hat, further bolstering its position in the cloud infrastructure landscape.
AT&T CyberSecurity
Series D in 2013
AT&T Cybersecurity specializes in providing comprehensive security solutions tailored for mid-market enterprises facing modern security threats. The company offers a suite of products encompassing cyber strategy and risk, identity and fraud management, network and endpoint security, as well as threat detection and response. Key offerings include managed threat detection, unified security management for managed security service providers (MSSPs), and the AlienVault USM platform, which aids in threat detection, incident response, and compliance management. Additionally, AT&T Cybersecurity features the Open Threat Exchange, fostering collaboration among security professionals by sharing actionable threat intelligence. The company serves a diverse range of sectors, including education, healthcare, finance, and retail, ensuring that organizations can effectively manage their security needs without excessive complexity or costs. Founded in 2007 and headquartered in San Mateo, California, AT&T Cybersecurity operates as a subsidiary of AT&T Communications, LLC. The company also has offices in Ireland, Spain, Australia, and Texas.
D2iQ
Seed Round in 2013
D2iq, Inc. is a technology company that specializes in developing a datacenter operating system (DCOS) to streamline the management and deployment of applications across physical and cloud-based infrastructures. Founded in 2013 and headquartered in San Francisco, D2iq's core product, Mesosphere DCOS, is built on open-source technology and simplifies the execution of applications in a data center environment, akin to launching apps on a personal computer. The company also offers solutions such as Mesosphere Infinity, which facilitates the transformation of Big Data into actionable insights, and Conductor, an interactive platform for hands-on cloud-native training. In addition to its software offerings, D2iq provides architectural and consulting services, including expert consultations, on-site training, and custom installations. The company's strategic alliances with prominent firms enhance its service offerings, enabling organizations to adopt open-source and cloud-native innovations effectively.
AT&T CyberSecurity
Series C in 2012
AT&T Cybersecurity specializes in providing comprehensive security solutions tailored for mid-market enterprises facing modern security threats. The company offers a suite of products encompassing cyber strategy and risk, identity and fraud management, network and endpoint security, as well as threat detection and response. Key offerings include managed threat detection, unified security management for managed security service providers (MSSPs), and the AlienVault USM platform, which aids in threat detection, incident response, and compliance management. Additionally, AT&T Cybersecurity features the Open Threat Exchange, fostering collaboration among security professionals by sharing actionable threat intelligence. The company serves a diverse range of sectors, including education, healthcare, finance, and retail, ensuring that organizations can effectively manage their security needs without excessive complexity or costs. Founded in 2007 and headquartered in San Mateo, California, AT&T Cybersecurity operates as a subsidiary of AT&T Communications, LLC. The company also has offices in Ireland, Spain, Australia, and Texas.
SpikeSource
Series C in 2008
SpikeSource is a software certification company that specializes in open source solutions. The company offers a platform designed to assemble, test, package, certify, and update open source, proprietary, and hybrid software. This platform aids independent software vendors (ISVs), independent developers, and IT departments by ensuring interoperability, scalability, and performance of their applications. Additionally, SpikeSource is partnered with Intel and manages the certification process for applications within the Intel Business Exchange, further enhancing its role in the software certification landscape.
XenSource
Series C in 2006
XenSource, Inc. is a developer of enterprise-grade virtualization technology that focuses on simplifying server infrastructure. Founded in 2004 and headquartered in Palo Alto, California, the company is known for its open-source hypervisor virtualization technology, which includes Xen 3.0, a robust platform designed for enterprise server deployment. In addition, XenSource offers Xen Optimiser, a software management solution for multi-server virtualization infrastructure, and subscription-based support services for its products. By leveraging these technologies, XenSource enables organizations to enhance server utilization, consolidate resources, and improve data center efficiency, ultimately reducing overall costs associated with server management. In October 2007, XenSource was acquired by Citrix Systems, Inc.
SpikeSource
Series B in 2006
SpikeSource is a software certification company that specializes in open source solutions. The company offers a platform designed to assemble, test, package, certify, and update open source, proprietary, and hybrid software. This platform aids independent software vendors (ISVs), independent developers, and IT departments by ensuring interoperability, scalability, and performance of their applications. Additionally, SpikeSource is partnered with Intel and manages the certification process for applications within the Intel Business Exchange, further enhancing its role in the software certification landscape.
XenSource
Series B in 2005
XenSource, Inc. is a developer of enterprise-grade virtualization technology that focuses on simplifying server infrastructure. Founded in 2004 and headquartered in Palo Alto, California, the company is known for its open-source hypervisor virtualization technology, which includes Xen 3.0, a robust platform designed for enterprise server deployment. In addition, XenSource offers Xen Optimiser, a software management solution for multi-server virtualization infrastructure, and subscription-based support services for its products. By leveraging these technologies, XenSource enables organizations to enhance server utilization, consolidate resources, and improve data center efficiency, ultimately reducing overall costs associated with server management. In October 2007, XenSource was acquired by Citrix Systems, Inc.
SpikeSource
Series A in 2005
SpikeSource is a software certification company that specializes in open source solutions. The company offers a platform designed to assemble, test, package, certify, and update open source, proprietary, and hybrid software. This platform aids independent software vendors (ISVs), independent developers, and IT departments by ensuring interoperability, scalability, and performance of their applications. Additionally, SpikeSource is partnered with Intel and manages the certification process for applications within the Intel Business Exchange, further enhancing its role in the software certification landscape.
XenSource
Series A in 2005
XenSource, Inc. is a developer of enterprise-grade virtualization technology that focuses on simplifying server infrastructure. Founded in 2004 and headquartered in Palo Alto, California, the company is known for its open-source hypervisor virtualization technology, which includes Xen 3.0, a robust platform designed for enterprise server deployment. In addition, XenSource offers Xen Optimiser, a software management solution for multi-server virtualization infrastructure, and subscription-based support services for its products. By leveraging these technologies, XenSource enables organizations to enhance server utilization, consolidate resources, and improve data center efficiency, ultimately reducing overall costs associated with server management. In October 2007, XenSource was acquired by Citrix Systems, Inc.
Linuxcare
Series C in 2000
Linuxcare is a company that specializes in providing professional, technical support, education, and product certification services for Linux and related open-source software technologies. Founded in 1998 and based in San Francisco, California, Linuxcare primarily targets large businesses, focusing its sales and marketing efforts on original equipment manufacturers, software vendors, Global 1000 companies, and internet infrastructure providers. The company supports 21 distributions of Linux and has established a customer base that includes notable names such as Dell, Hewlett-Packard, and Motorola. Linuxcare aims to enhance customer services and facilitate the adoption of Linux solutions in various business environments.
Sun Microsystems
Seed Round in 1982
Sun Microsystems is a multinational company that specializes in computer hardware, software, and information technology services. It is known for its strong advocacy of open systems and UNIX, along with being a significant contributor to open source software. The company offers a diverse range of scalable servers, including those based on SPARC64, UltraSPARC, AMD Opteron, and Intel Xeon microprocessors, catering to various needs from entry-level servers to high-performance computing systems. In 2009, Sun Microsystems was acquired by Oracle Corporation, marking a significant shift in its operational structure and market strategy.
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