What is Nostr?
Nostr stands for Notes and Other Stuff Transmitted by Relays. Behind the playful name is a simple idea: instead of an account on one company’s server, your identity is a cryptographic key pair that you generate and hold yourself. You sign your messages with it. Anyone can check the signature, and nobody can forge a message as you or take the identity away.
Those signed messages go to relays, which are independent servers that store notes and pass them on. You publish to several at once, and readers can fetch your notes from any relay that carries them. There is no central database and no company that owns the network. If one relay drops you, the others still have you, and your followers follow the key, not the server.
Why does it show up in sovereign setups?
The appeal is the same one that runs through self-hosting generally: no single party can quietly switch you off. A platform account can be suspended, renamed, or shut down. A Nostr identity is a key you control, so deplatforming someone means convincing every relay to drop them, which is a much harder thing to do.
It pairs naturally with Lightning payments, the fast Bitcoin layer, so sending a small tip to a note is a normal part of the culture rather than a bolt-on. The trade is honest: the tooling is rougher than a polished closed network, you are responsible for guarding your own key, and there is no central moderator to appeal to. You get portability and control, and you carry the keys that make them real.