Open source matter projects
Every project in the registry tagged matter, ranked by real GitHub adoption.
Wi-Fi CSI motion sensing for ESP32. C++ SDK, ESPHome, Native, and Matter frontends, browser tools, and a CLI for the full device lifecycle. GPLv3 and commercial
Home Assistant custom component for control Xiaomi Multimode Gateway (aka Gateway 3), Xiaomi Multimode Gateway 2, Aqara Hub E1 on default firmwares over LAN
Matterbridge plugin manager for Matter
Frequently asked questions
How many open source matter projects are there?
This registry tracks 3 projects tagged matter, with 13,238 GitHub stars between them. The most-adopted is espectre at 9,465 stars.
Are these matter projects free to use?
Yes — 3 of the 3 carry an explicit open-source licence across 3 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 matter 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 matter 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.