Open source

Draft, 13 November 2026

Jetto is built so that you're never locked in. Your data lives on your own devices, and the part that syncs it between devices, the server, is open source: anyone can read it, run it and improve it.

What's open and what isn't

• The sync server, protocol and encryption code are open source under the GNU Affero General Public License, version 3 (AGPL-3.0). You can run your own server for free, forever. They're published at github.com/jettoapp/jetto (the repository opens to the public when Jetto launches).
• The Jetto app (the website and the app you use at jettoapp.com) is free to use but not open source. Hosting is how Better The World, LLC pays for Jetto's development.

Contributing

Contributions to the open-source code will be welcome once our contributor licence agreement (CLA) is final. The CLA lets us use contributed code in both the open-source server and the free app. You keep the copyright in your work.

The Jetto name

Jetto℠ and the Jetto logo are service marks of Better The World, LLC. You're welcome to fork the open-source code under the AGPL-3.0, but a fork needs its own name and logo, and it can't suggest that it's made or endorsed by Jetto. The full trademark policy is in the repository.

If Jetto ever shuts down

We want you to be able to keep working even if we can't. If Better The World stops developing Jetto and nobody takes it over:

• We'll give at least 90 days' notice before shutting down Jetto hosting, so you can export your data or move it to your own server.
• Your data stays yours: you can always export it, and the local and self-hosted versions keep working with no Jetto servers at all.
• We intend to publish the Jetto app's source code under an open-source licence, so the community can keep running and improving it.