Smart home products have dropped in price dramatically over the last three years, but there's still significant variance between retailers. A Roomba that costs $399 at Target might be $329 on Amazon. A Nest thermostat on sale at Best Buy might undercut Google's own store. This guide compares prices on robot vacuums, smart doorbells, thermostats, air purifiers, and smart speakers — prices and availability may change by retailer.
This page brings the major US retailers — Amazon, Best Buy, Walmart, Target and the brands' own stores — into one place so you can compare prices on smart home devices side by side instead of opening a dozen tabs. Google Shopping leaves Amazon out; this tracker includes it.
What to check before buying
Model and generation — confirm a listing is the exact version you want, since older revisions often sit next to current ones.
Condition — new, open-box, refurbished and renewed listings carry different prices and warranty terms.
Seller and warranty — buying from the retailer or an authorized seller keeps returns and manufacturer warranty intact.
Total cost — factor in shipping, tax and any bundle or membership a price depends on.
Why prices and availability change
Each retailer sets and updates its own prices, so the same product can cost different amounts at different stores on the same day. Stock and promotions also shift through the year, with the largest moves around Prime Day, Back to School, Black Friday and post-holiday clearance. Prices on this page load from retailers when you run a comparison — confirm the final price on the retailer's site before buying.
When to set a price alert
If a product is above the range you want to pay, a price alert is worth setting — it helps most with higher-ticket items and the stretches between major sale events, when discounts are harder to predict. Compare prices on smart home devices and you can ask to be emailed if a tracked search comes in lower.
Frequently Asked Questions
What smart home system should I start with?
Amazon Alexa (Echo devices) has the broadest device compatibility. Apple HomeKit is more private. Google Home integrates tightly with Nest. Pick based on which phone ecosystem you're already in.
Are robot vacuums worth it?
For most homes, yes. A mid-range Roomba or Eufy running daily keeps floors clean with minimal effort. Prices have dropped — solid models now start under $200.
Does Ring or Nest make a better doorbell?
Ring has broader camera options and cheaper subscriptions. Nest doorbells integrate better with Google/Android ecosystems. Both are competitively priced.
When do smart home devices go on sale?
Amazon Prime Day is the single biggest event for Alexa/Echo/Ring products. Black Friday covers all brands. Alexa devices also go on sale frequently throughout the year.
About this tracker: Cheapzix compares retailer listings when available. Prices, availability, shipping, and taxes can change by retailer. We include Amazon (which Google Shopping often omits) and other major stores. Affiliate links may earn us a small commission at no cost to you. Always verify the final price on the retailer site before buying.