The "Open Source" page on the dashboard site[0] links to this firmware but nothing about the server side. Firmware for the thermostat itself is a requirement, but without a dashboard it's still not really Free.

Edit: If I read closely I would have seen:

> The firmware images and backend API server code will be open sourced soon, allowing the community to audit, improve, and self-host their own infrastructure.

[0] https://nolongerevil.com/