The Best Alexa-Friendly Smart Home Devices of 2021 Updated February 19, 2021 Devices that work with Amazon Alexa can make your home a smarter place to live. Using voice control, you can ask the world's most popular smart assistant to turn on the lights, adjust the thermostat, lock your front door, and more. With so many options, it can be difficult to know which smart gadgets are the best. That's why we're constantly reviewing the best Alexa devices to see what works well in each category and platform. Below you'll find the best Alexa-friendly smart home devices for each major smart home category we've covered.