Trademark and brand guidelines – Open Source Initiative

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Learn more about OSI’s mission, history, people, and programs.
Explore the list of OSI-Approved licenses and learn more about the license review process.
Learn more about Open Source AI, how do we define it, and its benefits to society.
Advancing Open Source through policy, regulation, and standards.
Supporting research, education, and knowledge about Open Source.
Connecting the people and organizations that build and support Open Source.
Explore the latest news, blog posts, newsletters, press mentions, and events from the OSI.
The Open Source Initiative (OSI) trademarks, including “OSI,” “Open Source Initiative,” the “OSI logo,” and “OSI Approved Open Source License,” are protected on behalf of the open source community. As trademark owners, OSI is legally obligated to prevent confusingly similar uses by third parties.
The OSI “Keyhole Logo,” designed by Colin Viebrock, symbolizes unlocking source code. This logo and its word mark are registered with the United States Patent and Trademark Office for public advocacy promoting non-proprietary software (Class 35) and educational services related to non-proprietary software (Class 41). The logo is also registered in Australia, Benelux, Canada, and China. The “OSI Approved Open Source License” is also a registered trademark of the Open Source Initiative.
Written permission is generally not required for non-commercial and community websites, business websites, promotional events, and publications, provided the following conditions are met:
The following uses of the OSI Trademarks are not approved under any foreseeable circumstances.
OSI retains and reserves all rights to the OSI Trademarks and their use, including the right to modify these guidelines.
These guidelines (except for trademark licenses executed for non-software goods) may be amended from time to time at the discretion of OSI and such changes will be effective ten (10) days after the changes are posted. OSI may provide you with notice of such changes, but need not do so. You are responsible for checking this site for any changes.
Users of OSI Trademarks acknowledge OSI’s sole ownership and agree not to interfere with or diminish OSI’s rights. They also agree not to register confusingly similar designations. Non-compliance with these guidelines requires modification of use or cessation of trademark use within ten days of written notice.
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