The steward of the Open Source Definition, setting the foundation for the Open Source Software ecosystem.
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Maintainer Month returns this May, and the Open Source Initiative (OSI) is proud to join GitHub and a global community of contributors in honoring the individuals who steward and sustain Open Source projects. In 2025, Maintainer Month enters its fourth year with a clear and urgent theme: Securing Open Source.
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We're excited to highlight the Certified Open Source Developer for Enterprise (CODE) certification, led by the TODO Group and Linux Foundation Training & Certification, with the Open Source Initiative (OSI) contributing as a supporting partner.
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The OSI is joining forces with fellow content partners Open Knowledge Foundation (OKF) and the Digital Public Goods Alliance (DPGA) to support OpenForum Academy (OFA) Symposium 2025, taking place November 18–19 at the FGV Law School in Rio de Janeiro, Brazil.
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Each year, the State of Open Source Report offers a valuable pulse check on the global Open Source ecosystem—and the 2025 edition is no exception. Produced by Perforce OpenLogic, in partnership with the Eclipse Foundation and the Open Source Initiative, this report uncovers the latest trends, tensions, and transformations shaping how Open Source is adopted, managed, and scaled in organizations of all sizes.
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For AI to be truly Open Source, it must uphold the same principles that have defined Open Source software for over two decades. There is no “80% open” or “open enough.” The freedom to use, study, modify, and share isn’t negotiable. It’s either there, or it isn’t.