Amazon
Amazon Smart Thermostat
$59.99Cheaper
Released 2021
Best Smart Thermostats · head-to-head
Amazon Smart Thermostat vs Honeywell Home T9 Smart Thermostat
A sourced, side-by-side comparison. Amazon Smart Thermostat is cheaper at $59.99. Every spec and price links to its source.
Honeywell Home
Honeywell Home T9 Smart Thermostat
$209.99
Released 2019
Which is better: the Amazon Smart Thermostat or Honeywell Home T9 Smart Thermostat?
On the specs we track, they're closely matched. The Amazon Smart Thermostat is the cheaper at $59.99.
As an Amazon Associate we earn from qualifying purchases. Prices verified at capture; live price may differ.
Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Amazon Smart Thermostat | Honeywell Home T9 Smart Thermostat |
|---|---|---|
| US price | $59.99 | $209.99 |
| Brand | Amazon | Honeywell Home |
| Released | 2021 | 2019 |
| Display | Basic segmented LED/LCD display; no color touchscreen | Graphical color touchscreen, 4.92 in H x 3.7 in W |
| Sensors included | Temperature plus indoor humidity sensor (humidity reported in Alexa app, not shown on the on-unit display); no occupancy sensor, no remote sensor support | Includes one wireless SmartRoom sensor (temperature + humidity); up to 20 additional SmartRoom sensors supported |
| Geofencing | Yes | Yes |
| Hvac compatibility | Low-voltage 24V systems (forced air gas/oil/electric, heat pumps); single-stage systems; does not support ACC-/ACC+ terminals, dual-band Wi-Fi only on 2.4 GHz | Up to 2H/2C conventional systems; up to 3H/2C heat pump systems; 24V low-voltage |
| C wire required | No | No |
| Voice assistants | Amazon Alexa only (requires separate Echo device) | Amazon Alexa, Google Assistant, Apple HomeKit, Microsoft Cortana, Samsung SmartThings, IFTTT, Ring |
| Energy reports | Yes | Yes |
| Release | 2021 | 2019 |
Sources — Amazon Smart Thermostat: safewise.com (verified 2026-06-15). Honeywell Home T9 Smart Thermostat: honeywellhome.com (verified 2026-06-15).
What's the difference between the Amazon Smart Thermostat and Honeywell Home T9 Smart Thermostat?
Where the two actually differ on the specs we track (4 of 7). Matching specs are omitted.
- Display: Amazon Smart Thermostat Basic segmented LED/LCD display; no color touchscreen vs Honeywell Home T9 Smart Thermostat Graphical color touchscreen, 4.92 in H x 3.7 in W
- Sensors included: Amazon Smart Thermostat Temperature plus indoor humidity sensor (humidity reported in Alexa app, not shown on the on-unit display); no occupancy sensor, no remote sensor support vs Honeywell Home T9 Smart Thermostat Includes one wireless SmartRoom sensor (temperature + humidity); up to 20 additional SmartRoom sensors supported
- Hvac compatibility: Amazon Smart Thermostat Low-voltage 24V systems (forced air gas/oil/electric, heat pumps); single-stage systems; does not support ACC-/ACC+ terminals, dual-band Wi-Fi only on 2.4 GHz vs Honeywell Home T9 Smart Thermostat Up to 2H/2C conventional systems; up to 3H/2C heat pump systems; 24V low-voltage
- Voice assistants: Amazon Smart Thermostat Amazon Alexa only (requires separate Echo device) vs Honeywell Home T9 Smart Thermostat Amazon Alexa, Google Assistant, Apple HomeKit, Microsoft Cortana, Samsung SmartThings, IFTTT, Ring
What reviewers say
Sourced tester consensus for each — the "what people who used it think" layer, not just specs.
Amazon Smart Thermostat
Three whitelisted outlets reviewed the ~$60 Amazon Smart Thermostat in 2021-2022 and all rate it the best-value smart thermostat. Tom's Guide and Reviewed/USA Today are hands-on reviews (Reviewed wired it to a test rig); TechRadar is a 'should I buy' buying-advice piece with no hands-on testing. None report any lab-measured numbers (all measured arrays empty). The one universal caveat is that the thermostat is Alexa-only. All nine quotes were verified as literal substrings of the fetched pages. (3 sourced reviews, 2 lab-tested.)
Praised: Outstanding value at ~$60, undercutting Nest and Ecobee; Clean, minimalist design; includes a faceplate in the box; Intuitive Alexa Hunches automation for energy savings.
Flagged: Works only with Alexa — no Google Home or Apple HomeKit; No support for remote temperature sensors; Requires a C-wire (adapter needed for older homes).
Honeywell Home T9 Smart Thermostat
Two whitelisted testers (TechHive, Tom's Guide) reviewed the T9 hands-on in 2019 and rate it a strong, sensor-focused smart thermostat, though neither ran lab benchmarks. Both praise best-in-class remote sensors and easy setup; both flag the missing onboard motion sensor and a less-intuitive app. All six quoted lines verified verbatim against the source text. (2 sourced reviews.)
Praised: Best-in-class remote sensors with long range and quick responsiveness; Easy setup and a bright, responsive touchscreen.
Flagged: The thermostat unit itself has no built-in motion sensor; No auto-away/occupancy triggering and no built-in Alexa speaker or behavior learning; Companion app is less intuitive than Ecobee's and has minor glitches.