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Become a free member of OSI today

The Open Source Initiative (OSI) is the steward of the Open Source Definition.

OSI sets the foundations for the open source ecosystem.

We're a non-profit corporation with global scope formed to educate about and advocate for the benefits of open source and to build bridges among different constituencies in the open source community.

Why become a free member

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OSI is a member-driven community.

The OSI offers a variety of opportunities for individuals, open source projects & foundations, public sector organizations, institutions of higher education, and businesses to join and contribute to our mission.

Individual members are individuals who are part of the open source community and who have decided to declare their support for the open source software movement. Join now as a free member.

"If the highly accessible, transparent, open, and earnest nature of the people in our community is anything to go by, there are plenty of reasons to think that we've not only got a great community undergirding the movement, but also plenty of reasons to simply be hopeful for what the future might bring. I think that everyone can have a role to play in giving life to the activism of the open source community -- the OSI is a great place to do just that." Vladimir Bejdo

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