Growing the impact of Open Source around the world
The Open Source Initiative is the authority that defines Open Source, recognized globally by individuals, companies, and by public institutions.
OUR 2025 roadmap to a stronger ecosystem
Strengthening collaborations with legal experts, policymakers, and maintainers, as well as addressing the complexities of the Open Source Definition in the age of AI.
THE open source ai definition 1.0
We have released the first stable version of the Definition.
About the Open Source Initiative
The OSI is the authority that defines Open Source, recognized globally by individuals, companies, and by public institutions.
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.
From the blog
Open Forum for AI, Open Source Initiative respond to White House on AI R&D strategy
The Open Forum for AI (OFAI) and OSI submitted feedback to the White House in response to its request for information on the development of a 2025 National AI R&D Strategic Plan.
End of 10: The Open Source alternative to forced obsolescence
The OSI is proud to stand with the “End of 10” campaign—a community-driven effort to turn the looming end of Windows 10 support into an opportunity for freedom, sustainability, and digital empowerment.
OSI at the Open Source Founders Summit: supporting entrepreneurs to build a business with Open Source
Open Source Founders Summit (#05F525), held May 19–20 in Paris, brought together a vibrant community of Open Source entrepreneurs, builders, and advocates for two days of deep, engaging conversations about what it takes to create sustainable, …
New project highlights Open Source Initiative and Apereo Foundation’s response to White House on AI
The Institute for Progress (IFP), a non-partisan U.S. think tank focused on innovation policy, announced a new project that highlights responses to the Trump Administration’s request for public comment on what should be included in a …
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.
Upcoming Open Source Events
June 2025
Viva Technology
VivaTech accelerates innovation by connecting startups, tech leaders, major companies, public institutions, & investors responding to our world’s biggest challenges. https://vivatechnology.com/
UN Open Source Week 2025
https://www.un.org/digital-emerging-technologies/content/open-source-week-2025 UN Open Source Week 2025 facilitates global dialogue and collaboration on open source, digital public infrastructure (DPI), and the development of innovative solutions to [...]
Open Source Summit NA
Open Source Summit is the premier event for open source developers, technologists, and community leaders to collaborate, share information, solve problems, and gain knowledge, furthering [...]
July 2025
Linux Foundation Europe Roadshow
The Linux Foundation Europe Roadshow is a dynamic, one-day event designed to bring together policymakers, developers, academics, and industry leaders for a grassroots gathering focused [...]
OpenSource.net is a resource for the community
The news site a not-for-profit platform for sharing knowledge, perspectives and advocacy to support a healthy open ecosystem.