How we rank smart home gear

Where the data comes from

For each page we search Amazon for that device type and protocol, then open every candidate listing and record its title, price, star rating, review count, the "bought in past month" line when Amazon shows one, the seller, and the full feature bullets. Those numbers come straight from the listing on the capture date. We don't edit them, and they drift as Amazon updates prices and reviews.

A listing only makes the page if its own bullets back up the protocol. A plug that says "Matter" in an ad image but not in the listing text doesn't go on the Matter page.

We don't test products by hand

We don't install each device in a lab. Our rankings combine what thousands of buyers report (the rating and how many people left one) with a check of each listing's specs against what matters for that protocol. This page explains exactly what we do instead.

The score

Every product gets a score out of 100:

• 45% customer rating: the Amazon star rating out of 5.
• 30% review volume: the number of ratings on a log scale, capped at a ceiling set per page. A switch with 1,500 reviews is well proven; a smart plug needs far more to stand out. The log scale means going from 10 to 100 reviews counts as much as going from 1,000 to 10,000.
• 25% features: a short checklist for that page (for example 800 Series chip, Long Range, and 3-way support on Z-Wave switches). Each item has a weight, and the weights are the same for every product on the page.

Scores only compare products on the same page. An 80 on the Zigbee switch page and an 80 on the Wi-Fi bulb page don't mean the same thing. On the product-type pages, which mix protocols, each product keeps the score it earned on its own protocol page.

Awards are our call

Labels such as Best Overall, Best Budget, and Best for Apple Home are editorial. The top-scoring product usually earns Best Overall, but not always: a slightly lower score can still be the better buy if it works with more systems or costs half as much. Every award card says why it won.

Avoid picks

A product lands in "the one to avoid" only for a concrete problem we can point to in the listing, and we quote it. Past examples: a title naming one model while the bullets describe another, an import model that won't work on US power or apps, a reseller charging far more than retail, and a camera that does nothing until you pay for a plan. Being new or having few reviews isn't enough on its own.

Works with

The Works with column shows which smart home systems can control a product, either directly or through a hub the listing says you need. We follow the listing first, then these rules for the protocol:

• Matter devices work with Apple Home, Google Home, Alexa, SmartThings, Home Assistant, Hubitat, and Homey, given a Matter controller (and a Thread border router for Matter over Thread).
• Z-Wave devices work with Home Assistant, SmartThings, Hubitat, and Homey. Alexa, Google, and Apple can't talk to Z-Wave.
• Zigbee 3.0 devices work with Home Assistant, SmartThings, Hubitat, Homey, and Echo speakers that have a built-in Zigbee hub.
• Brand-app devices (Wi-Fi and Bluetooth) get the systems their listing names, plus Home Assistant when it has an official integration for that brand.

Gift guides and deal pages

Gift picks come from the same rankings: the best-scoring product in each device type within the price limit, with at least 100 reviews and 4.2 stars. Accessories like replacement sensors and USB sticks are left out.

Updates and corrections

Each page shows when it was last updated and when its Amazon prices were checked. When we refresh a page, a "What changed" note lists products added or dropped, award changes, and corrections. If you spot a mistake, tell us on GitHub and we'll fix it and note the change.

How we make money

Links to Amazon carry our Associates tag. If you buy through one, Amazon pays us a commission at no extra cost to you. That's the only money involved. No brand pays for placement, sends us free products, or reviews a page before it's published.