What is seL4?A high-assurance, high-performance operating system microkernel

seL4 is unique because of its comprehensive formal verification.

seL4 is open source, available on GitHub, and supported by the seL4 Foundation.

The foundation for trustworthy systems.

White Paper

More in-depth information about seL4, what the formal verification means, and how to use seL4.

Fact Sheet

Quick high-level facts about seL4.

Comparison

Comparison to other operating systems.

How to use

What you can do with the seL4 kernel.

History

Where seL4 comes from.

FAQ

Frequently asked questions and their answers.