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.
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.
EU AI Act and CRA: Timelines and Resources
Over the last month, the EU has passed two milestones in implementing its Cyber Resilience (CRA) and AI acts. The OSI has been engaged with European policymakers over the past two years to ensure those laws …
The AI Era Arcs Toward Openness
A surge of openness in AI has defined 2026. Amid calls for both caution and support, prevailing trends point to a future in which models are built and released openly. Recent research offers new insight into …
Preliminary agenda announced for the Open Technology Research Symposium 2026
Open Technology Research Symposium 2026 releases preliminary agenda. The event takes place on 26 and 27 October 2026 at the University of Barcelona during Barcelona Open Tech Week
Openness Made All of This Possible
Every AI system in the headlines today, whether proprietary or Open Source, exists because researchers shared their work openly. That openly shared research produced Open Source software: the frameworks used to train these models, the libraries …
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.
The board of directors
Most of OSI’s board of directors are elected by individual members and Affiliate organizations.