Addition

Addition is a venture capital firm based in New York, founded in 2020 by Lee Fixel. The firm focuses on investing in early and growth-stage technology companies, specifically targeting those that are founder-led and technology-enabled. Addition aims to support visionary entrepreneurs in their efforts to build impactful and enduring businesses. As a Registered Investment Adviser, the firm is committed to fostering innovation and growth within the tech sector.

Roshni Chandwani

Investor

Lee Fixel

Investor

Robbie Horwitz

Partner

Aasim Maknojia

Investor

Andrew Miskiewicz

Partner

Aaron Schildkrout

Investor

Jason Schneider

Investor

Jack Spiegel

Investor

Past deals in Open Source

Speckle

Series A in 2024
Speckle is a collaborative data hub that connects various tools within the Architecture, Engineering, and Construction (AEC) sectors, aiming to enhance global project delivery. The company offers an open-source digital infrastructure that facilitates automation in design, engineering, and construction processes. Its cloud-based platform provides a set of connectors that allow users to curate design data and access multiple data streams for advanced querying. This infrastructure addresses interoperability challenges between different software systems and supports real-time collaboration, data management, versioning, and automation. By enabling clients to coordinate effectively and gather insights on project data, Speckle seeks to streamline workflows in a traditionally fragmented industry.

Onehouse

Series B in 2024
Onehouse offers a cloud-native managed lakehouse platform that integrates the functionality of data lakes and data warehouses. Built on Apache Hudi, the platform allows users to establish their data lakes quickly and efficiently, enabling rapid data processing and management. Onehouse's service provides businesses with the flexibility to utilize open data formats, avoiding vendor lock-in, while ensuring seamless interoperability with various query engines. This self-managing data layer is designed to optimize data ingestion and processing, delivering the scalability and cost benefits associated with data lakes alongside the ease of use typical of traditional data warehouses.

Temporal

Series B in 2023
Temporal Technologies Inc. is a software company based in Bellevue, Washington, established in 2019. It develops an open-source microservices orchestration engine that enables developers to create and manage scalable distributed applications, workflow functions, and data pipelines. The platform supports seamless execution of development, debugging, and testing processes, along with resource provisioning and monitoring tools. It also offers solutions for financial transactions. Temporal's technology is designed to ensure the reliable completion of workflows of any size and complexity, incorporating features such as built-in support for exponential activity retries and compensation logic through the native saga pattern. Additionally, the company provides cloud services to enhance its offerings.

Flox

Series A in 2023
Flox develops a web application that enhances developer productivity throughout the software development lifecycle. The company offers SaaS products that leverage Nix, allowing enterprises to install packages, manage development and production environments, and ensure consistent software deployment across embedded devices. By enabling developers to treat environments and packages as code, Flox streamlines the process of building and managing software, promoting efficiency and reliability in development practices.

Onehouse

Series A in 2023
Onehouse offers a cloud-native managed lakehouse platform that integrates the functionality of data lakes and data warehouses. Built on Apache Hudi, the platform allows users to establish their data lakes quickly and efficiently, enabling rapid data processing and management. Onehouse's service provides businesses with the flexibility to utilize open data formats, avoiding vendor lock-in, while ensuring seamless interoperability with various query engines. This self-managing data layer is designed to optimize data ingestion and processing, delivering the scalability and cost benefits associated with data lakes alongside the ease of use typical of traditional data warehouses.

Chronosphere

Venture Round in 2023
Chronosphere, Inc. is a technology company that specializes in developing an open-source metrics data platform known as M3. Founded in 2019 and headquartered in New York, the company has additional offices in Seattle, Vilnius, and Warsaw. Chronosphere's platform provides comprehensive monitoring solutions for infrastructure, applications, and business metrics, enabling organizations to manage the complexities of cloud-native environments. By offering tools that help DevOps teams quickly identify and resolve issues across various layers of the technology stack, Chronosphere enhances operational reliability and supports data-driven decision-making. The platform is utilized by prominent brands to improve developer productivity, control costs, and enhance customer satisfaction.

Anyscale

Series C in 2022
Anyscale, Inc. is a technology company based in Berkeley, California, founded by the creators of the open-source project Ray. It specializes in developing distributed programming platforms and tools that simplify the creation and scaling of artificial intelligence applications. Anyscale's software enables developers and machine learning engineers to effortlessly scale their applications from local environments to the cloud, eliminating the need for complex infrastructure. The company's framework allows users of varying skill levels to build and deploy compute-intensive applications efficiently, facilitating faster and more cost-effective market entry for AI products. Anyscale aims to enhance the end-to-end AI lifecycle, making it accessible for organizations to leverage AI technologies.

Temporal

Series B in 2022
Temporal Technologies Inc. is a software company based in Bellevue, Washington, established in 2019. It develops an open-source microservices orchestration engine that enables developers to create and manage scalable distributed applications, workflow functions, and data pipelines. The platform supports seamless execution of development, debugging, and testing processes, along with resource provisioning and monitoring tools. It also offers solutions for financial transactions. Temporal's technology is designed to ensure the reliable completion of workflows of any size and complexity, incorporating features such as built-in support for exponential activity retries and compensation logic through the native saga pattern. Additionally, the company provides cloud services to enhance its offerings.

Onehouse

Seed Round in 2022
Onehouse offers a cloud-native managed lakehouse platform that integrates the functionality of data lakes and data warehouses. Built on Apache Hudi, the platform allows users to establish their data lakes quickly and efficiently, enabling rapid data processing and management. Onehouse's service provides businesses with the flexibility to utilize open data formats, avoiding vendor lock-in, while ensuring seamless interoperability with various query engines. This self-managing data layer is designed to optimize data ingestion and processing, delivering the scalability and cost benefits associated with data lakes alongside the ease of use typical of traditional data warehouses.

Anyscale

Series C in 2021
Anyscale, Inc. is a technology company based in Berkeley, California, founded by the creators of the open-source project Ray. It specializes in developing distributed programming platforms and tools that simplify the creation and scaling of artificial intelligence applications. Anyscale's software enables developers and machine learning engineers to effortlessly scale their applications from local environments to the cloud, eliminating the need for complex infrastructure. The company's framework allows users of varying skill levels to build and deploy compute-intensive applications efficiently, facilitating faster and more cost-effective market entry for AI products. Anyscale aims to enhance the end-to-end AI lifecycle, making it accessible for organizations to leverage AI technologies.

Chronosphere

Series C in 2021
Chronosphere, Inc. is a technology company that specializes in developing an open-source metrics data platform known as M3. Founded in 2019 and headquartered in New York, the company has additional offices in Seattle, Vilnius, and Warsaw. Chronosphere's platform provides comprehensive monitoring solutions for infrastructure, applications, and business metrics, enabling organizations to manage the complexities of cloud-native environments. By offering tools that help DevOps teams quickly identify and resolve issues across various layers of the technology stack, Chronosphere enhances operational reliability and supports data-driven decision-making. The platform is utilized by prominent brands to improve developer productivity, control costs, and enhance customer satisfaction.

BuildBuddy

Seed Round in 2020
BuildBuddy offers enterprise solutions for developers utilizing Bazel, an open-source build system. The company's platform effectively captures essential data such as build logs, invocation details, target information, and artifacts, providing users with a comprehensive overview of each build process. Additionally, BuildBuddy enables remote build execution, available both on-premises and as a fully managed cloud service, facilitating faster software development and testing. Founded by Siggi Simonarson, BuildBuddy is headquartered in Palo Alto, California.

Temporal

Series A in 2020
Temporal Technologies Inc. is a software company based in Bellevue, Washington, established in 2019. It develops an open-source microservices orchestration engine that enables developers to create and manage scalable distributed applications, workflow functions, and data pipelines. The platform supports seamless execution of development, debugging, and testing processes, along with resource provisioning and monitoring tools. It also offers solutions for financial transactions. Temporal's technology is designed to ensure the reliable completion of workflows of any size and complexity, incorporating features such as built-in support for exponential activity retries and compensation logic through the native saga pattern. Additionally, the company provides cloud services to enhance its offerings.
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