What are all of the 24/7 subscription based central monitoring systems (e.g. for alarm and smoke/fire/flood etc) that can be tied into HA?
I will start - as I know of only 1. Yolink sensors work with a hub that is cloud based and the HA integration is through the cloud only. But, they are about to announce a new hub that is connected to the cloud AND locally connected. And there is a service called Virtualarm (flat rate of $9/month) that allows you to tie in some or all of your yolink sensors into the service. For Virtualarm you can select for all of your yolink sensors, either 24/7, logging only, or away. When a sensor is triggered Virtualarm will call you and if you are not available then they will call fire or police.
What other options are there that you folks would know for central monitoring of sensors in HA (please give an explanation of how each one works (cloud/local/direct/indirect etc.), thank you)?