The Wyze Thermostat is the best option if you already own other Wyze products.

During our testing, we liked the Wyze Thermostat, which is another smart thermostat that costs less than $100. However, this one has a few more limitations than the excellent Amazon Smart Thermostat.Although this model costs $71 more than Amazon's, Wyze includes a C-wire adapter with every purchase, in contrast to Amazon.The Wyze Thermostat is compatible with Alexa and Google Assistant, but it does not support Apple HomeKit. It can also be set up quickly and easily using the Wyze app.
I found it difficult to adjust the temperature at the thermostat, and the hardware itself is not as well-designed as Amazon's.However, this shouldn't be too much of a problem if you already own a lot of Wyze products and intend to primarily modify them using the Wyze app.Check out our Wyze Thermostat critique.