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OSI is the authority that defines Open Source, recognized globally by individuals, companies, and by public institutions. Learn more about the Open Source AI Definition, the Cyber Resilience Act, and how to support the Open Source ecosystem.
- About
The Open Source Initiative (OSI) is a non-profit corporation...
- Programs
Home Programs. We define Open Source. For developers,...
- Licenses
Open source licenses are licenses that comply with the Open...
- Open Source Definition
1. Free Redistribution. The license shall not restrict any...
- News
As part of the Open Source AI Definition roadshow and as we...
- Donate to OSI
Support open source now! Thank you for supporting open...
- Sponsors
While the OSI is very grateful for their support, the OSI...
- History
OSI was formed in 1998 as an educational, advocacy, and...
- About
The Open Source Initiative (OSI) is the steward of the Open Source Definition, the most widely used standard for open-source software. Founded in 1998, the Open Source Initiative coined the term open source in opposition to the free software movement.