Apple Home Kit and Security

I have an ADT monitored security system. It is hardwired and I had 2 wireless motions that I removed. I want to move to a wireless system. Honeywell appears to have a part that will allow me to do this. I can search each individual piece such as door lock or camera or other sensors and determine if it is Home Kit compatible and add it my self. I have several Meross switches etc that work fine with Apple HomeKit. However if I built my system piece by piece ADT said they would not monitor it. ADT will build me a system but it is with all Google cameras, Nests etc. I do not want anything Google. I think I still want a monitored system and I am looking for the best way to start. Thanks