To simplify software development

We define Open Source

The Open Source Definition is the foundation of the modern software ecosystem. We build a world where the freedoms and opportunities of Open Source software can be enjoyed by all.

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The leading voice on the policies and principles of open source

Protecting the Open Source ecosystem

We support institutions and individuals working together to create communities of practice in which the healthy open source ecosystem thrives.

Regulatory language cannot be the same for all software
In reviewing the language and concepts being used in the various draft bills and directives circulating in Brussels at present, it is clear that the experts crafting the language are using their understanding of proprietary software …
Why open video is vital for Open Source
The news that the European Commission’s competition directorate (DG COMP) has decided not to conduct a full antitrust investigation into the Alliance for Open Media’s (AOM) licensing policy is to be welcomed. The post Why open video is …
Webinar: ClearlyDefined proceeding towards a clear governance structure
The ClearlyDefined project was invited to give an update as part of the OpenChain webinar series. I had the opportunity to share with this global community the project's mission: to create a global database of licensing …
Another issue with the Cyber Resilience Act: European standards bodies are inaccessible to Open Source projects
Europe's standards bodies have no functional relationships with Open Source charities and do not consult them. The post Another issue with the Cyber Resilience Act: European standards bodies are inaccessible to Open Source projects appeared first …

Support Open Source

As a public charity organization, OSI is supported by donations of corporations and individuals. Thanks to our sponsors that support our vision to be the leading voice on policies and principles of Open Source.

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Maintainer Month

A month for open source maintainers to gather, share, and be celebrated. Open source runs the world, but who runs open source? Open source maintainers are behind the software we

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David L. Lawrence Convention Center in Pittsburgh, PA

Whether you’re new to Drupal or a longtime member of the Drupal community, you’ll find new insights and connections to advance your career and your business at this event in

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WordCamp Europe 2023

Athens, Greece

Held in Athens, Greece, WordCamp Europe is an informal, community-organized gathering of WordPress enthusiasts – from casual users to Core developers – where we discuss all things WordPress, share ideas

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Open Infra Summit Vancouver 2023

Join us in Vancouver for Open Infra Summit. OSI will have a booth there, celebrating our 25th anniversary. Collaborate directly with the people building and running open source infrastructure using

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The board of directors

Most of OSI’s board of directors are elected by individual members and Affiliate organizations.