As many of you will know im extending my own Home assistant system. I have noticed some support for what i would call 'proper' control equipment rather than the toy town stuff more traditionally supported.
I see texecom have a mqtt
Texecom2mqtt: Texecom alarm panel and MQTT integration with HA support - Third party integrations - Home Assistant Community (home-assistant.io)
Vanderbilt have
Vanderbilt SPC - Home Assistant (home-assistant.io)
Galaxy Guy has one for Honeywell Galaxy (im sure he will post more info)
Hikvision
GitHub - zoilomora/hikvision-to-mqtt: Sends alarm events from Hikvision DVR to MQTT