- [Chatwoot](https://www.chatwoot.com) - Self-hosted customer communication platform, an alternative to Intercom & Zendesk. ([Source Code](https://github.com/chatwoot/chatwoot)) `MIT``Ruby`
- [Conduit](https://conduit.rs/) - A simple, fast, and reliable chat server powered by Matrix. ([Source Code](https://gitlab.com/famedly/conduit)) `Apache-2.0``Rust`