Open source pubsub projects
Every project in the registry tagged pubsub, ranked by real GitHub adoption.
Simple, fast, and secure push notifications for all
Dapr is a portable runtime for building distributed applications across cloud and edge, combining event-driven architecture with workflow orchestration.
Scalable real-time messaging server in a language-agnostic way. Self-hosted alternative to Pubnub, Pusher, Ably, socket.io, Phoenix.PubSub, SignalR. Set up once
Broadcast, Presence, and Postgres Changes via WebSockets
The open source and enterprise-ready webhooks service 🦀
Frequently asked questions
How many open source pubsub projects are there?
This registry tracks 5 projects tagged pubsub, with 83,482 GitHub stars between them. The most-adopted is Ntfy at 35,223 stars.
Are these pubsub projects free to use?
Yes — 5 of the 5 carry an explicit open-source licence across 2 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which pubsub project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these pubsub projects still maintained?
5 of the 5 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.