Because of the propensity for 3rd parties stealing my data or just going out of business leaving me with no product, I went down the route of homeassistant + zigbee buttons and door/motion sensors with cheap internet-isolated tapo cameras + frigate nvr to capture the footage
Also a Google Coral TPU to process the footage for activity.
This is the nerd route, but it also can't be taken away from me. Also no subscriptions and cheaper initial purchase price.
Though the HA hobby eats your wallet.