Hi, there is a reliable alternative for the Nest thermostat and other Nest products. I’ve worked more than 3 years to achieve this kind of resiliency for MyEcobee and now MyNextDevices.
I ask for a small contribution given the amount of design, development & test to achieve this kind of resilience and the added features. You can ask @slavazagromov for more feedback about MyNextTstat and zoned heating/cooling solutions: