After supporting Matter in beta since 2023, the open-source smart home platform is now officially certified as a Matter Controller. This won’t make a jot of difference for users, says founder Paulus Schoutsen, but it’s “the cherry on the cake.”
He added that certification has been a lengthy and expensive process; to certify a controller, you have to test every device type it’s compatible with. And, unlike Apple, Amazon, and Google, Home Assistant supports most Matter devices.
[home-assistant.io]