Getting OpenBSD
 Buy CDs/Shirts/Posters
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Getting Source
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OpenBSD Resources
 Daily Changelog
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 Manual Pages
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 Reporting Problems
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Supporting OpenBSD
 Donations
 OpenBSD Foundation

The OpenBSD project produces a FREE, multi-platform 4.4BSD-based UNIX-like operating system. Our efforts emphasize portability, standardization, correctness, proactive security and integrated cryptography. As an example of the effect OpenBSD has, the popular OpenSSH software comes from OpenBSD.

OpenBSD is freely available from our download sites, or as a 3-CD set sold at openbsdstore.com.

Pre-orders for the upcoming OpenBSD 5.9 release are enabled at openbsdstore.com. The current release is OpenBSD 5.8, released Oct 18, 2015.

OpenBSD is developed entirely by volunteers. The project's development environment and developer events are funded through contributions collected by The OpenBSD Foundation. Contributions ensure that OpenBSD will remain a vibrant and free operating system.