Netatmo - Control your heating wherever you are
Tuya Smart - Tuya Smart is a free to use Lifestyle Application by Tuya Inc.
Nest Thermostat (3rd gen) - A slimmer, sharper, sexier thermostat
Vivint Element Smart Thermostat - A smart wireless thermostat that blends comfort and savings
Elgato Eve Thermo - The Elgato Eve Thermo isn't a house-wide thermostat - instead it connects to individual heating units and controls them separately instead of single point of interaction.
Embue - More than a smart thermostat. Sensors in every room.