Top 10 Best lockable thermostat in 2026

Last Updated - 6/21/2026

🏆Best Choice

Amazon

Amazon Smart Thermostat – Save money and energy - Works with Alexa and Ring - C-wire required

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•Smart upgrade - Amazon Smart Thermostat is an easy way to switch from a traditional thermostat and help reduce energy usage.
•Create comfort zones throughout your home by using select Echo devices or Amazon Smart Air Quality Monitor to automatically adjust heating and cooling based on temperature readings or presence detection.
•Save money - After purchase, Amazon will send you an email with details about rebates that may be available from energy providers in your area. Explore rebates above.
•Save energy - According to EPA estimates, ENERGY STAR certified thermostats save an average of $50 on yearly energy bills.
•Automatic Control - Alexa can automatically switch between your preferred home, away, and sleep temperatures.
•On-the-go control - Let Alexa set the temperature, or set it yourself from anywhere with the Alexa app.
•You can do it - The Alexa app will guide you through the installation process, but customer service is always available.
•Reliable - Made with Honeywell Home Thermostat Technology and backed by 130 years of experience.
•Create your Alexa+ home: With Alexa+, set routines using just your voice, control multiple devices at once, and chat casually to make requests.

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$79.99

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Google

Google Nest Thermostat - Smart Thermostat for Home - Programmable Wifi Thermostat - Charcoal

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•ENERGY STAR certified smart thermostat for home that helps you save energy and stay comfortable.Connectivity : Wi-Fi - 802.11b/g/n 2.4 GHz, 802.11a/n 5 GHz Wi-Fi., Wireless interconnect : Bluetooth Low Energy Please refer to the product description section below for all applicable legal disclaimers.Product note: You can also check your system’s compatibility before purchasing a Nest thermostat with our online Nest Compatibility Checker on the Google Nest support page
•The Nest Thermostat is designed to work without a C wire in most homes, but for some systems, including heating only, cooling only, zone controlled, and heat pump systems, you’ll need a C wire or other compatible power accessory
•Nest Thermostat turns itself down when you leave, so you don’t waste energy heating or cooling an empty home. Lock feature: No
•Programmable thermostat that lets you create an energy efficient schedule in the Google Home app on your Android or iPhone
•Remote control lets family members change the thermostat temperature from anywhere on a phone, laptop, or tablet[1]
•Savings Finder looks for more ways your thermostat can help you save, and suggests tweaks to your schedule in the app; check with your energy provider to learn more about rebates and more ways to save on a Nest thermostat
•Smart thermostat with HVAC monitoring, which looks out for your heating and cooling systems; sends an alert if something doesn’t seem right, along with helpful reminders to make maintenance easier[2]
•Control Nest Thermostat with Google Home and other smart home platforms. Compatible with Google Assistant and all Matter-certified voice assistants. Voice control requires a compatible smart device.
•Connectivity : Wi-Fi - 802.11b/g/n 2.4 GHz, 802.11a/n 5 GHz Wi-Fi., Wireless interconnect : Bluetooth Low Energy
•Please refer to the product description section below for all applicable legal disclaimers

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$89.99

$129.99

-31%

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Emerson

Sensi Smart Thermostat, 100 Years Of Expertise, Wi-Fi, Data Privacy, Programmable, Easy DIY Install, Works With Alexa, Energy Star Certified, Mobile App, ST55

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•PRIVACY PROTECTION*: Sensi won’t sell your personal information to third parties
•EASY DIY INSTALLATION: Use the built-in level and step-by-step app instructions for a quick installation. Works with HVAC equipment found in most homes. Common wire (c-wire) is not required in most applications
•SAVE ABOUT 23% ON HVAC ENERGY*: The ENERGY STAR-certified Sensi smart thermostat can help you save energy with features like flexible scheduling, remote access, and usage reports
•SMART MAINTENANCE: Sensi can help monitor the performance and efficiency of your HVAC system by delivering valuable usage reports, alerts about your equipment, and maintenance reminders like filter replacement
•SIMPLE CONFIGURATION: Looks and feels like a thermostat. Has buttons and fits the same space as a traditional thermostat so you don’t have to patch and paint your walls

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Honeywell Home

Honeywell Home RTH9585WF1004 Wi-Fi Smart Color Thermostat, 7 Day Programmable, Touch Screen, Energy Star, Alexa Ready, Gray

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•COMFORT COMES IN YOUR COLOR. Personalize your Wi-Fi Smart Color Programmable Thermostat to fit your décor.
•SAVE ENERGY AND GET REWARDED by checking with your energy provider about available rebates. Plus, eligible customers can enroll in their local Utility's "DEMAND RESPONSE PROGRAM" which can reward you for allowing the utility to slightly adjust your AC or furnace temperature settings when there is high energy demand.
•YOUR SCHEDULE. YOUR WAY. Flexible programming options for your schedule or utility company’s peak rate pricing.
•EASY OPERATION AND INTUITIVE. Bright, easy-to-read touchscreen makes for simple operation.
•COMPATIBLE WITH: Forced air (gas, oil or electric), hot water and steam, and heat pumps with electric backup. Does NOT work with electric baseboard heat (120-240V). C-Wire required.
•ENERGY STAR certified. Help save energy, track your heating and cooling with monthly energy reports and get personalized tips on reducing energy use.
•Before purchasing, check to see if this thermostat is compatible with your home and to determine if your home needs a C-wire power adapter. Our Air products and services work with you and for you, supporting and creating more comfortable surroundings
•Works with most heat/cool oil furnace systems. Will not work with heating only oil furnace systems unless a C-Wire is present.
•Fan Control Options include On: Fan is always on; Automatic: Fan runs only when the heating or cooling system is on; and Circulate: Fan runs randomly about 35% of the time.
•The WiFi Smart Color Thermostat works seamlessly with Amazon Alexa and Google Home, as well as our mobile app, so you can control the temperature from anywhere

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ecobee

ecobee Smart Thermostat Essential - Energy Star Certified programmable Wi-Fi Thermostat - Works with Siri, Alexa, and Google Assistant

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•Save up to 23% every year on heating and cooling costs, adjusts to your set schedule to save energy when you’re gone and optimize comfort when you’re home. Compared to a hold of 72
•Compatible with 85% of systems, check your system’s compatibility with our online ecobee Compatibility Checker on the ecobee support page
•Change your temperature by easily tapping the color touchscreen or using the ecobee app. Plus, free software upgrades ensure you get the best out of your Smart Thermostat Essential, for years to come
•Automatically adjusts to your set schedule to save energy when you’re gone and optimize comfort when you’re home. Keep track of your energy consumption when you're on the go on the ecobee app
•Easy DIY install. No C Wire, no problem. Get the ecobee Power Extender Kit (PEK) for homes without a C-Wire and keep your walls looking nice with our trim kit – both sold separately
•Works with leading smart home ecosystems. Pair Smart Thermostat Essential with Apple HomeKit, Google Assistant, and Alexa
•Works with most 24 VAC HVAC equipment: Gas, oil, electric, dual fuel, forced air Conventional (2H/1C or 1H/2C) Heat Pump (2H/1C) Boilers. You can check your system’s compatibility with our online ecobee Compatibility Checker on the ecobee support page
•Add in a SmartSensor which allows you to measure the temperature in rooms that matter most. It reads temperature and movement in whatever room it is placed in for complete home monitoring and energy savings (SmartSensor 2 pack sold separately)
•Built in eco+ Smart Features: Indoor humidity detection, schedule assistant, time of use which preheats or precools your home when energy is less expensive to reduce energy use during peak hours

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$139.99

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Gedreew

Gedreew Large Thermostat Lock Box Cover with Key, Clear Thermostat Cover with Lock Compatible With Honeywell Home Thermostat On Wall, AC Lock Box Cover with Key Fits Thermostats 5"H x 6" W or Smaller

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•【Safeguard Your Thermostat】The thermostat lock box with key prevent unauthorized adjustments, tampering and damage to thermostat settings by children, tenants, or the public. Enjoy reduced energy costs and significant savings for your household
•【Crystal Clear Durable PC Material】Gedreew thermostat lock box crafted from robust and chemically resistant PC plastic. This thermostat cover with lock offers exceptional durability, UV resistance, and anti-yellowing properties. Enjoy a clear view of your thermostat settings at all times
•【Perfect Fit for Various Thermostats】The thermostat lock box designed to accommodate thermostats measuring 7.28"W x 5.75"H x 2.75"D or smaller. Whether it's for your home, apartment, office, school, hotel, restaurant, or industrial space, our ac lock box cover with key finds its place everywhere, ensuring optimal protection and security
•【Maintaining Temperature Precision】Featuring a four-sided ventilation design, this lock box for thermostat on wall prevents interference with temperature detection, ensuring the accurate performance of your thermostat without compromise
•【Easy Installation】This thermostat cover with lock can be installed without removing the thermostat; May need to mount thermostat off-center within thermostat lock box for access to battery door on select models

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$15.99

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Emerson

Sensi Lite Smart Thermostat, Data Privacy, Programmable, Wi-Fi, Easy DIY, Works With Alexa, Energy Star Certified, ST25, Most Systems C-Wire Not Required, Except On Heat/Cool Only and Heat Pump System

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•EASY DIY INSTALLATION: Do it yourself fast with a built-in level and simple step-by-step instructions. Works with the HVAC equipment found in most homes
•COMMON WIRE REQUIREMENTS: Common wire(C-Wire) required for heat pump and heat/cool only systems. C-wire not required on most systems
•SAVE ABOUT 23% ON HVAC ENERGY*: ENERGY STAR-certified and packed with features that help you save money, including flexible scheduling, geofencing, remote access and usage reports
•PRIVACY PROTECTION*: Sensi won’t sell your personal information to third parties or leverage your thermostat activity data for targeting or advertising purposes
•CONTROL FROM ANYWHERE: The top-rated mobile app for Android and iOS devices makes it easy to control your comfort from a smartphone or tablet

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$63.97

$69.99

-9%

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Honeywell Home

New! Honeywell Home Non-Programmable Thermostat, Single-Stage, 1 Heat/1 Cool Compatibility, X1N, White

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•CUSTOMIZE: Choose to receive change filter reminders and select display settings to optimize this thermostat for home.The RTH11B is a replacement for the non-programmable RTH5160 for 1 heat, 1 cool applications
•EXPERIENCE: A large screen and clear font enhance daily use
•INSTALLATION: The Honeywell Home UWP wall plate provides an easy install process and simplifies future device upgrades
•FEATURES: Backlit display, Custom display settings, Change filter reminders, 32°F low-heat setpoint, 1-year warranty
•COMPATIBILITY: 1 Heat/1 Cool, 750 mV, hot water heat, forced air (gas, oil, or electric) [does not work with electric baseboard heat (120-240V)]
•POWER: 2 AA batteries (not included)

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$34.50

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ControlTemp Thermostats

ControlTemp CT72 Basic Tamper Proof Thermostat

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•Tamper Proof Thermostat for landlord and commerical property owners
•Renters/Guest can not set heat over 72 degrees
•Renters/Guests can not set AC below 72 degrees
•Works with most system types including Boiler, Furnance, Single Heat pumps

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$69.99

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ControlTemp Thermostats

ControlTemp CT100 Standard Tamper Proof Thermostat

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•Tamper Proof Thermostat for landlord and commerical property owners
•Renters/Guest can not set heat over 72 degrees
•Renters/Guests can not set cool below 75 degrees
•7 Day Programmable schedule
•Works with most system types including Boiler, Furnance, Heat pumps (Single/Multi Stage)

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$63.99

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