Simplenote uses Simperium to store and sync notes across multiple app platforms. The Simperium libraries handle all the networking so developers can focus on building a great user experience.

Contribute to Simplenote

All of the Simplenote apps are open source and ready for your contributions! You can find the source on GitHub:

Electron (Windows and Linux):

The README files on each of those repositories have all of the instructions you need to get started!

Third Party Applications

We are not supporting additional third-party Simplenote applications at this time. This could change though, so please stay tuned!

Legacy Simplenote API

Some older applications may still be using the legacy Simplenote API at Note that this API has been deprecated and will no longer function after October 1, 2018.