To promote and protect open source...

As a global non-profit, The Open Source Initiative (OSI) protects and promotes open source software, development and communities, championing software freedom in society through education, collaboration, and infrastructure, stewarding the Open Source Definition (OSD), and preventing abuse of the ideals and ethos inherent to the open source movement. See our about and history pages for more.

Open source software is software that can be freely used, changed, and shared (in modified or unmodified form) by anyone. Open source software is made by many people, and distributed under licenses that comply with the Open Source Definition.

News

React to React

The OSI has received several inquiries concerning its opinion on the licensing of React [1], which is essentially the 3-clause BSD license along with, in a separate file, an 'Additional Grant of Patent Rights' [2].

Software Freedom Advocates Invited to the Open Source Initiative's Community Social

OSI hosting a community social for the open source software community: join us for drinks, dinning and discussions.

Meadhall, Cambridge, MA April 04, 2017 -- If you're in the greater Boston, Massachusetts area on Tuesday, April 4th, the OSI Board of Directors invites you to join us and the free and open source software community for a casual evening get-together (Oh, and please feel free to bring a friend).

OSI Welcomes the Journal of Open Source Software as Affiliate Member

Open Source Initiative Extends Support for Computational Science and Engineering Research and Researchers.

PALO ALTO, Calif. - March 28, 2017 -- The Open Source Initiative® (OSI), a global non-profit organization formed to educate about and advocate for the benefits of open source software and communities, announced that the Journal Of Open Source Software (JOSS), a peer-reviewed journal for open source research software packages, is now an OSI affiliate member.