Definition
A Nostr relay is a simple server that accepts, stores, and forwards the cryptographically signed messages that make up the Nostr network. Relays are deliberately "dumb": they hold signed events and serve them to clients that ask, but they cannot create or alter messages on your behalf because they do not hold your private key. Users typically connect to several relays at once, so the failure or censorship of any one does not cut them off.
Running your own relay
Relay software is lightweight enough to run on a Raspberry Pi, a home server, or alongside a Bitcoin node. Running your own relay means a copy of your notes lives on hardware you control, and it lets you set your own policy for what you store. Many sovereign Bitcoiners pair a personal relay with their full node so that both their transactions and their communications depend on infrastructure they own rather than a third-party platform.
Why relays decentralize the network
There is no master relay and no registry of "approved" relays. This is the key difference from a federated network: anyone can stand one up, and clients route around hostile or offline servers automatically. The more independently operated relays exist, the harder the network is to censor or shut down.
D-Central's sovereign self-hosting catalog covers relay options alongside other self-hosted services.
See relevant NIPs in the Nostr NIPs reference (94).
In Simple Terms
A Nostr relay is a simple server that accepts, stores, and forwards the cryptographically signed messages that make up the Nostr network. Relays are deliberately…