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seL4

seL4 is a formally verified, high-assurance open source microkernel operating system supported by the seL4 Foundation.

Visit sel4.systems ↗
Extension
.systems
Discovered
10/23/2026
Domain registered
Domain age
Established
Language
English

Why it ranks

71 Strong

  • Brand (25%)95

    Brand: seL4

  • Popularity / traffic (20%)10

    Not in Tranco top 1M

  • Authority / backlinks (15%)unknown

    Not checked yet

  • Marketing of the domain (15%)75

    Official foundation site with summit info, mailing lists, and GitHub links.

  • Content quality (10%)92

    92/100

  • Design & build (5%)85

    85/100

  • Domain age (10%)100

    12.6 years since registration

Official, comprehensive website for the world-renowned formally verified seL4 microkernel and foundation.

How the score works

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