Nostr: How do I choose relays?

Start with relays your client can reach reliably, then consider their rules, retention, cost, location, and support for the NIPs you use.

Short answer

Start with relays your client can reach reliably, then consider their rules, retention, cost, location, and support for the NIPs you use. NIP-11 lets relays advertise metadata, while NIP-65 lets users publish read and write relay choices. A small set of dependable relays often works better than a long list of unreliable ones. Revisit choices if posts or replies are missing.

Sources

NIP-11: Relay metadata, NIP-65: Relay lists.