If you want to get away from cloud based systems altogether, Hubitat is worth looking at. Tiny company, good people, and if the company did go out of business the system would still work because everything runs locally.
Some community members run Hubitat for their essential tasks and Add In smartthings for the additional “ Nice to have“ third-party cloud integrations. 
https://community.smartthings.com/t/hubitat-elevation-hub-home-automation-that-is-local/117107