Source code

Check it yourself. Open source follows with the Beta.

Open sourceThe source code of the uOS app is open source and built to be checked line by line. About uOS links to the exact version you are running.
Access for proven expertsSecurity researchers and engineers with a track record can get access to our private GitHub repository to inspect the code. Ask below.
Public at the betaWhen uOS reaches beta, the source code opens to the public.

Request GitHub access

Tell us who you are and what you would like to review. We reply to every request.

Where we are

uOS is in alpha. Real people use it every day.

By invitationEvery account starts with an invitation from a member, for a named person.
Changing fastNew versions arrive often. The app tells you when one is ready and what changed.
Built in the openThe whitepaper and the changelog are public. The source code is open to review on request, and public at the beta.

FAQ

Frequently asked questions

Is uOS open source?

The source of the uOS app is published on GitHub so anyone can read it and check the encryption, and About uOS links to the exact version you run. When uOS leaves alpha, it becomes fully open source.

Can I self-host uOS on my own servers?

Yes. With a self-hosting licence from UltimaOS you run the same uOS on your own infrastructure — the same apps, client and encryption, operated by you. Each release ships a signed manifest so you can verify what you deploy.

How do I know the code served is the code published?

Each release is signed. Anyone can verify that the code served at uos.sh is the code we published, and self-hosters can check the signed manifest of every file.

Is there an open-source alternative to Google Workspace?

uOS is a private, encrypted workspace whose source is public and which you can self-host — a sovereign, open alternative to Google Workspace and Microsoft 365.

See also : self-hosting uOS · how it’s secured

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