tldr; Reddit praises Venstar thermostats for their local API, Home Assistant integration, and no subscription requirements, though they're less known than major brands.
Check pricesBest praise vs top criticism for Venstar T4900
“The only thermostat I could find that didn't require a subscription and worked with Home Assistant. It also has a local API so you can integrate it with anything you can think of.”
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10 Reddit opinions analyzed • Last updated 2/24/2026