Open-source, Go-based real-time messaging server for pub/sub and live updates; supports WebSocket, SSE, gRPC and brokers (Redis, NATS) with official SDKs.

10.7k stars728 forksApache-2.0last commit Actively maintained
Managed Pusher-compatible WebSocket service providing hosted socket servers, channel and event-broadcasting APIs for real-time messaging. Offers scaling, metrics, authentication integrations and monitoring as a hosted alternative to self-hosting soketi.
Open-source, Go-based real-time messaging server for pub/sub and live updates; supports WebSocket, SSE, gRPC and brokers (Redis, NATS) with official SDKs.

10.7k stars728 forksApache-2.0last commit Actively maintained
AnyCable is a realtime server for reliable two-way communication over WebSockets and SSE, designed to power chats, notifications, presence, and streaming updates for any backend.

2.4k stars124 forksMITlast commit Actively maintained
A protocol gateway that bridges users across different instant messaging networks using libpurple adapters, enabling cross-network chat and presence.

419 stars92 forkslast commit Slowing down
Scalable, modular XMPP/Jabber server written in Java supporting TCP, BOSH, WebSockets, federation, components, HTTP API and push notifications.

359 stars110 forksAGPL-3.0last commit Actively maintained
Every option on this page is open source and free to run on your own hardware, so you own the data and there is no subscription to cancel. 3 of 4 shipped a commit in the last six months. Licences in this list: Apache-2.0, MIT, AGPL-3.0. In exchange you take on hosting, backups and updates yourself.
Browse everything in Messaging & Event Streaming (Brokers/Queues).