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

Founder and Managing Partner

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 company that provides a collaborative data hub tailored for the Architecture, Engineering, and Construction (AEC) sectors. It focuses on creating an open ecosystem that addresses the challenges of fragmentation within the industry. By offering a cloud-based platform, Speckle enables users to automate design, engineering, and construction processes. Its infrastructure includes a default set of connectors that facilitate the curation of design data and the integration of multiple data streams, allowing for advanced querying. The platform supports interoperability between different software applications, enhances real-time collaboration, and simplifies data management and versioning. This empowers clients to effectively coordinate their projects and gain valuable insights into their data footprint.

Onehouse

Series B in 2024
Onehouse is a developer of a cloud-native managed lakehouse platform that integrates the functionalities of data lakes and data warehouses. Its service, built on Apache Hudi, allows users to establish their data lakes rapidly while ensuring easy data processing and management. Onehouse's platform is designed to be self-managing, automatically ingesting, managing, and optimizing data for improved processing speeds. Users benefit from the flexibility of owning their data in open formats, avoiding vendor lock-in, and achieving cost and scalability advantages typical of data lakes. This innovative approach positions Onehouse as a leader in delivering efficient and accessible data solutions for businesses.

Temporal

Series B in 2023
Temporal Technologies Inc. is a software company based in Bellevue, Washington, founded in 2019. It specializes in developing an open-source microservices orchestration engine that enables developers to build and operate scalable and resilient applications. This platform supports the creation of complex workflows and data pipelines, ensuring reliable workflow completion regardless of size or complexity. It includes features such as built-in support for exponential activity retries and native saga pattern support for defining workflow compensation logic. Additionally, Temporal offers tools for development, debugging, testing, resource provisioning, and monitoring, as well as cloud services to enhance application performance and reliability.

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 is a developer of a cloud-native managed lakehouse platform that integrates the functionalities of data lakes and data warehouses. Its service, built on Apache Hudi, allows users to establish their data lakes rapidly while ensuring easy data processing and management. Onehouse's platform is designed to be self-managing, automatically ingesting, managing, and optimizing data for improved processing speeds. Users benefit from the flexibility of owning their data in open formats, avoiding vendor lock-in, and achieving cost and scalability advantages typical of data lakes. This innovative approach positions Onehouse as a leader in delivering efficient and accessible data solutions for businesses.

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 that focuses on simplifying distributed AI development through its innovative programming platforms and tools. Founded in 2019 by the creators of Ray, Anyscale has developed the Ray framework, which is an open-source project that allows software developers and machine learning engineers to effortlessly scale their applications from a personal laptop to cloud environments. The company's solutions enable developers of varying skill levels to manage the complete AI lifecycle on a unified computing substrate, facilitating the rapid development and deployment of AI products. Based in Berkeley, California, Anyscale aims to accelerate the productionization of AI applications, making it easier and more cost-effective for organizations to bring AI solutions to market.

Temporal

Series B in 2022
Temporal Technologies Inc. is a software company based in Bellevue, Washington, founded in 2019. It specializes in developing an open-source microservices orchestration engine that enables developers to build and operate scalable and resilient applications. This platform supports the creation of complex workflows and data pipelines, ensuring reliable workflow completion regardless of size or complexity. It includes features such as built-in support for exponential activity retries and native saga pattern support for defining workflow compensation logic. Additionally, Temporal offers tools for development, debugging, testing, resource provisioning, and monitoring, as well as cloud services to enhance application performance and reliability.

Onehouse

Seed Round in 2022
Onehouse is a developer of a cloud-native managed lakehouse platform that integrates the functionalities of data lakes and data warehouses. Its service, built on Apache Hudi, allows users to establish their data lakes rapidly while ensuring easy data processing and management. Onehouse's platform is designed to be self-managing, automatically ingesting, managing, and optimizing data for improved processing speeds. Users benefit from the flexibility of owning their data in open formats, avoiding vendor lock-in, and achieving cost and scalability advantages typical of data lakes. This innovative approach positions Onehouse as a leader in delivering efficient and accessible data solutions for businesses.

Anyscale

Series C in 2021
Anyscale, Inc. is a technology company that focuses on simplifying distributed AI development through its innovative programming platforms and tools. Founded in 2019 by the creators of Ray, Anyscale has developed the Ray framework, which is an open-source project that allows software developers and machine learning engineers to effortlessly scale their applications from a personal laptop to cloud environments. The company's solutions enable developers of varying skill levels to manage the complete AI lifecycle on a unified computing substrate, facilitating the rapid development and deployment of AI products. Based in Berkeley, California, Anyscale aims to accelerate the productionization of AI applications, making it easier and more cost-effective for organizations to bring AI solutions to market.

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.

Snyk

Series E in 2021
Snyk Ltd., established in 2015, specializes in a Software as a Service (SaaS) platform that enhances application security. It focuses on identifying, rectifying, and monitoring known vulnerabilities across critical components of modern applications, including code, open-source libraries, containers, and infrastructure as code. Snyk's offerings, such as Snyk Code (static application security testing), container vulnerability management, and application security management, integrate seamlessly with developers' workflows, improving security posture, productivity, and collaboration. With over 1,200 global customers, including industry leaders like Google and Salesforce, Snyk is recognized for its developer-first approach and strategic partnerships.

Temporal

Series A in 2020
Temporal Technologies Inc. is a software company based in Bellevue, Washington, founded in 2019. It specializes in developing an open-source microservices orchestration engine that enables developers to build and operate scalable and resilient applications. This platform supports the creation of complex workflows and data pipelines, ensuring reliable workflow completion regardless of size or complexity. It includes features such as built-in support for exponential activity retries and native saga pattern support for defining workflow compensation logic. Additionally, Temporal offers tools for development, debugging, testing, resource provisioning, and monitoring, as well as cloud services to enhance application performance and reliability.

Snyk

Series D in 2020
Snyk Ltd., established in 2015, specializes in a Software as a Service (SaaS) platform that enhances application security. It focuses on identifying, rectifying, and monitoring known vulnerabilities across critical components of modern applications, including code, open-source libraries, containers, and infrastructure as code. Snyk's offerings, such as Snyk Code (static application security testing), container vulnerability management, and application security management, integrate seamlessly with developers' workflows, improving security posture, productivity, and collaboration. With over 1,200 global customers, including industry leaders like Google and Salesforce, Snyk is recognized for its developer-first approach and strategic partnerships.
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