Quick verdict: Nest wins on design and auto-learning. Honeywell T9 wins on room sensors at a lower cost. Neither supports Apple HomeKit, so for HomeKit users, ecobee is the only option. Choose between Nest and Honeywell based on whether you prioritize design + auto-learning (Nest) or included room sensor + round form factor (Honeywell T9).

Quick Comparison

Feature Nest Learning Thermostat Nest Thermostat Honeywell Home T9 Honeywell Home Sensi
Price (CAD) ~$329 ~$149 ~$199–229 ~$129–149
Auto-schedule Yes (learning) Partial No No
Room sensors No No 1 included No
Apple HomeKit No No No No
Google Home Yes Yes Yes Yes
Alexa Yes Yes Yes Yes
Warranty 2 years 2 years 2 years 2 years
C-wire needed No (power harvesting) No No (in most setups) No
Display 3.25″ circular colour 2.5″ circular 2.5″ circular Small LCD/touchscreen

Design & Display

Nest Learning Thermostat: Circular stainless steel housing in four finish options. 3.25-inch colour display with Farsight activation (display lights when you approach). The most attractive thermostat on the market, and Nest’s clearest win over any competitor.

Nest Thermostat: Similar round form factor, smaller display, simpler materials. Less premium than the Learning Thermostat.

Honeywell T9: Round display, 2.5-inch colour touchscreen. Similar circular aesthetic to Nest but the display is smaller. Honeywell’s design is inoffensive but doesn’t match Nest’s premium finish quality.

Honeywell Sensi: Smaller rectangular unit. Functional but not distinctive.

Design verdict: Nest wins, especially with the Learning Thermostat. If design matters, Nest is the only choice in this category.

Auto-Schedule vs Manual

Nest Learning Thermostat: Observes your manual temperature adjustments for about a week and builds a schedule on its own. Most households find this accurate within 2 weeks. You can edit the schedule by hand if it learns something wrong.

Nest Thermostat: Has basic scheduling (not auto-learning). You set the schedule by hand through the app.

Honeywell (T9, Sensi): Manual scheduling through the app. No auto-learning.

Auto-learning verdict: Nest Learning Thermostat wins, unique in the category.

Room Sensors

Nest: Neither current Nest model offers room sensors. The thermostat reads temperature only at its mounted location.

Honeywell T9: Includes one SmartRoom sensor (temperature + occupancy). Additional sensors ~$30–40/each. The system targets room temperature where the sensor detects occupancy.

Room sensor verdict: Honeywell T9 wins; Nest has nothing comparable.

Demand Response & Utility Programs

Nest: Rush Hour Rewards, available through utilities that have partnered with Google. Coverage is significant but narrower than ecobee’s.

Honeywell (Resideo): Utility program partnerships through the Resideo platform. Narrower coverage than ecobee; comparable to or slightly narrower than Nest in most markets.

Demand response verdict: Comparable; ecobee wins this category overall. Between Nest and Honeywell, check your specific utility’s qualifying list.

Price & Value

Nest Thermostat (~$149) vs Honeywell Sensi (~$129–149): Similar budgets: Nest wins on design; Sensi is comparable on features at the budget tier.

Nest Learning Thermostat (~$329) vs Honeywell T9 (~$199–229): The T9 includes a room sensor and costs $100–130 less. For the price gap, the Honeywell T9’s sensor capability is a meaningful advantage, unless Nest’s auto-learning and premium design matter more to you.

Nest vs Honeywell: Learning Thermostat / Nest Thermostat vs T9 / Sensi (full spec comparison)

The Verdict by Use Case

Buy Nest Learning Thermostat if:
– Design is a priority (the most attractive thermostat available)
– You want auto-learning without manual schedule setup
– You’re invested in Google Home / Nest ecosystem (cameras, speakers)

Buy Honeywell T9 if:
– You want room sensors at a lower cost per sensor than ecobee
– The $100–130 saving over Nest Learning is meaningful
– Design is less important than sensor functionality

Buy Nest Thermostat if:
– Budget is the constraint
– You want a Nest aesthetic without the Learning Thermostat price
– Google Home integration is your primary goal

For HomeKit users: Neither Nest nor Honeywell supports HomeKit. If you use Apple products and want smart home integration, the only option is ecobee. See Nest vs ecobee: Which Should You Buy?

Frequently Asked Questions

Does Nest or Honeywell support Apple HomeKit?
Neither does. No Nest or Honeywell thermostat supports Apple HomeKit. For HomeKit, ecobee is the only mainstream smart thermostat option.

Does Honeywell have auto-scheduling like Nest?
No, Honeywell thermostats (T9, Sensi) require manual schedule setup. Only the Nest Learning Thermostat has automatic schedule learning.

Which has better sensors, Nest or Honeywell?
Honeywell wins this one. The T9 includes one SmartRoom sensor with additional sensors available. Nest offers no room sensors for any current model.

Is Honeywell T9 worth it over Nest Thermostat?
At comparable prices, yes. The T9 adds a room sensor, which is a meaningful feature advantage. Nest Thermostat wins on design and Google ecosystem fit.

Can I use a Honeywell thermostat with Google Home?
Yes, Honeywell T9, T10, and Sensi all support Google Home and Alexa. They don’t support HomeKit.