Relay Implementations

This is a list of all known implementations of the Nostr relay spec. You only need this if you're planning on running a relay yourself. Relays are (so far) application agnostic. You can run your own or use any or all of the public instances.

Go

Relayer Basic: A simple reference relay backed by Postgres, written as a demo on top of the Relayer framework for building custom relays

C++

Stirfry: A database-less relay implementation in C++.

C#

NNostr: A C# relay
netstr: A modern relay with high test coverage

Rust

nostr-rs-relay: A minimalistic relay written in Rust that saves data on SQLite
søstr: A private nostr relay written in rust, saves all notes from one pubkey and publish them to anyone that requests them

Node.js / Typescript

nostream: A nostr relay written in Typescript backed by PostgreSQL (renamed from nostr-ts-relay)
Minds Nostr Relay: A relay for Minds, an open-source social network
- Minds Engine - Nostr: Relevant Minds API code for reading/writing Minds posts using Nostr
nostr-relay-nestjs: A Nostr relay with a clear architecture and high test coverage (Postgres, MeiliSearch, NestJS)
Nosflare: A serverless Nostr relay purpose-built for Cloudflare Workers and the Cloudflare KV store

Clojure

me.untethr.nostr-relay: A relay written in Clojure

Python

nostrypy: Relay, client, and other tooling in python
nostr_relay: A Nostr relay written in python, backed by SQLite

Kotlin

NostrPostr Relay: A Kotlin Relay supporting both SQLite and Postgresql
knostr: A nostr relay implemented in Kotlin with support for Postgres and metrics(micrometer)

Java

SuperConductor Nostr-Relay Framework & Web Application: Java 20, Spring WebSocketSession 3.2.2, Spring Boot 3.2.4, atop nostr-java library. Simple. Clean. OO.