Hey @talmage, welcome! The default Tidbyt experience does depend on our servers, and we haven’t open sourced our entire backend.
The device itself is bootloader-unlocked so you can flash your own firmware that serves Pixlet apps from your own server. In doing that though you would lose out on or have to reimplement a fair bit of functionality, like being able to manage the device with a mobile app.
I could see a future in which we have a standalone version of the Tidbyt backend that you can run on your server or premises, but that’s not on the current roadmap.