Open Source

Ansible is an open-source automation platform that simplifies IT infrastructure management, application deployment, and configuration management through agentless, declarative automation. The tool ser

Apache Cassandra is an open-source distributed NoSQL database management system designed for handling massive amounts of structured data across commodity servers, offering high availability, fault tol

Apache CouchDB is a free, open-source document-oriented NoSQL database — managed by the Apache Software Foundation — storing data as JSON documents, using HTTP/REST as its native API, and employing Ja

Cal.com is the leading open-source scheduling infrastructure platform, enabling businesses and developers to build appointment booking and calendar management into any application. Founded in 2021 and

Dagster is an open-source data orchestration and pipeline development platform that reimagines how data pipelines are built by modeling data assets (tables, ML models, reports) explicitly rather than

dbt Labs develops dbt (data build tool), an open-source software platform that enables data analysts and engineers to transform data in their warehouses using SQL-based modeling and version control. T

Excalidraw is an open-source virtual whiteboard application for creating hand-drawn-aesthetic diagrams, flowcharts, wireframes, and collaborative sketches — built by Excalidraw s.r.o. in Brno, Czech R

Fauna, Inc. is a San Francisco, California-based serverless distributed database company — venture-backed private company — that developed FaunaDB (now branded Fauna), a globally distributed ACID-comp

Hugging Face is the leading AI model hosting and collaboration platform and the creator of the Transformers library — providing open-source infrastructure for sharing, discovering, and deploying machi

Jenkins is an open-source automation server that enables developers to build, test, and deploy software through continuous integration and continuous delivery pipelines. The company serves software de

Kubernetes (K8s) is the dominant open-source container orchestration platform — originally developed by Google engineers (Joe Beda, Brendan Burns, Craig McLuckie) in 2014, donated to the Cloud Native

Mattermost is an open-source, self-hostable team messaging and collaboration platform built for security-conscious enterprises, government agencies, and development teams that cannot or will not use c

Metabase is an open-source business intelligence and analytics platform that enables anyone in an organization — not just data analysts — to query databases, create charts, and build dashboards throug

Mistral AI is a French artificial intelligence company building and commercializing high-performance open and proprietary large language models, positioning itself as Europe's leading AI foundation mo

Moodle is the world's most widely-used open-source learning management system — providing educational institutions, corporations, and government organizations with a free, customizable platform for on

Prebid is an open-source header bidding framework and industry consortium that enables digital publishers to run fair, transparent programmatic advertising auctions — allowing publishers to solicit bi

Prefect is a San Francisco-based Python workflow orchestration platform — backed with $46.1 million in total funding from Atreides Management, Bessemer Venture Partners, Positive Sum, and Calm Venture

Prometheus is an open-source systems monitoring and alerting toolkit — originally developed at SoundCloud in 2012 and donated to the Cloud Native Computing Foundation (CNCF) in 2016, where it became t

Redis is an open-source, in-memory data structure store used as a database, cache, message broker, and streaming engine, and the company Redis Ltd. provides enterprise-grade Redis products and cloud h

RudderStack is a San Francisco-based warehouse-native customer data platform (CDP) enabling companies to collect, transform, and route real-time customer event data while maintaining full data ownersh

Storyboarder is an open-source storyboarding software application developed by Wonder Unit that helps filmmakers, animators, and video creators quickly visualize their stories through sketched boards,

Terraform is an open-source infrastructure as code tool developed by HashiCorp that enables developers and operations teams to define, provision, and manage cloud infrastructure through declarative co

Travis CI is a Berlin-based continuous integration and continuous delivery (CI/CD) platform — one of the original cloud-based CI services for open-source projects (founded 2011) — providing automated

Twenty is a Paris, France-based open-source CRM company — backed by Y Combinator (S23) with $5.5 million in total funding including a $5 million seed round in November 2024 led by Runa Capital with 50

Vocode is a San Francisco-based open-source voice AI company providing a developer library and platform for building real-time conversational voice applications — enabling developers to create AI voic