Open Source Messaging & Event Streaming Tools

Open source messaging & event streaming tools

projects 8 combined stars ★ 25K refresh nightly

Messaging & Event Streaming is one of the most active slices of the open source world — the 8 projects below are ranked by GitHub stars, which makes this page roughly a community-voted shortlist rather than a vendor-curated catalogue. Every card shows the license and the last-commit date, so you can filter out the two failure modes of free software in one glance: restrictive licensing that blocks your use case, and abandonment that leaves you maintaining a fork. When two projects look comparable, prefer the one with more recent activity and the more permissive license (MIT/Apache-2.0 over AGPL) unless copyleft specifically serves your goals. Hover into any project for its full README — the documentation quality is usually the honest tell of engineering quality.

All Messaging & Event Streaming tools

AutoMQ ★ 11K

S3-based serverless Kafka reinvented for cost efficiency

rank001 licenseApache-2.0 written inJava typeMessaging & Event Streaming

Soketi ★ 5.6K

Next-gen WebSockets server for real-time apps

rank002 licenseAGPL-3.0 written inTypeScript typeMessaging & Event Streaming

Timeplus ★ 2.3K

Real-time stream processing made simple and affordable

rank003 licenseApache-2.0 written inC++ typeMessaging & Event Streaming

Sequin ★ 2.2K

Open-source message stream built on Postgres

rank004 licenseMIT written inElixir typeMessaging & Event Streaming

Trench ★ 1.7K

Fast, scalable analytics infrastructure

rank005 licenseMIT written inTypeScript typeMessaging & Event Streaming

Hook0 ★ 1.5K

Open-source webhooks for seamless integrations

rank006 licenseNOASSERTION written inRust typeMessaging & Event Streaming

Operational ★ 477

Real-time event tracking and response for tech products

rank007 licenseAGPL-3.0 written inVue typeMessaging & Event Streaming

Workbench ★ 442

Inspect, debug, and replay BullMQ queues visually

rank008 licenseMIT written inTypeScript typeMessaging & Event Streaming

Frequently asked questions

How many open source Messaging & Event Streaming tools are there?

This registry tracks 8 open source Messaging & Event Streaming projects, with 24,939 combined GitHub stars. The list is ranked by stars and refreshed nightly.

What is the most popular open source Messaging & Event Streaming project?

AutoMQ leads this category with 10,775 GitHub stars, followed by Soketi.

Are these Messaging & Event Streaming tools free?

Yes — every project listed here is open source. Some also offer paid hosted versions alongside the free self-hosted option; the licence for each project is shown on its card.