Series A Open Source Companies

World-class technical talent, on tap.

Discourse is the open-source discussion platform built for the next decade of the Internet.

Leaders in technology to deliver Open Banking and the Consumer Data Right

Promptfoo develops software tools that support testing, evaluation, and security analysis of applications built with language models.

Timefold is a platform that optimizes complex scheduling and routing tasks.

HumanSignal provides human data services and infrastructure to evaluate, train, and fine-tune AI.

Mastra is a Typescript framework to build AI agents

DecentralGPT is a decentralized AI network for LLM inference, supporting open and closed-source models.

Appwrite is a secure end-to-end BaaS for Web, Mobile, and Flutter developers

Smallstep is an open-source toolkit to automate certificate administration and secure infrastructures.

Nous Research is a decentralized AI startup that focuses on developing open-source, human-centric artificial intelligence models and tools.

Parasail is an AI deployment network that enables organizations to run and scale AI workloads without managing physical hardware.

Kestra is an orchestration platform that serves as the control plane for business-critical workflows across data, infrastructure, and AI.

SurrealDB is an AI-native, multi-model database that combines various data models into a single engine to simplify application development.

Polars is an open-source library designed for fast and efficient data manipulation.

Cline is a developer of an open‑source AI coding agent that automates software creation tasks within integrated development environments.

Eventual makes processing images, video & audio as easy as SQL. Their platform helps AI companies handle petabytes of multimodal data.

Start with an API spec. Generate SDKs in multiple languages and API documentation tailored to your brand.

WunderGraph is a next generation BFF framework designed to optimize frontend, fullstack, and backend developer workflows

Formance is an open-source and cloud-native infrastructure platform to build financial applications.

Open source password manager for teams

Ethyca is a privacy engineering platform that enables engineers to develop and ship privacy as a feature of any system.

Lightdash turns a dbt project into a full-stack BI platform.

Pydantic operates an observability platform, Pydantic Logfire, as well as an open source data-validation framework.

Aarna Networks solves enterprise edge and private 5G management complexity through zero-touch edge orchestration at scale.