Open source pubsub projects
Every project in the registry tagged pubsub, ranked by real GitHub adoption.
Simple, fast, and secure push notifications for all
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
Frequently asked questions
How many open source pubsub projects are there?
This registry tracks 3 projects tagged pubsub, with 52,684 GitHub stars between them. The most-adopted is Ntfy at 34,288 stars.
Are these pubsub projects free to use?
Yes — 3 of the 3 carry an explicit open-source licence across 1 distinct licence, 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?
3 of the 3 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.