Kidde Smart Smoke & CO Detector with Ring is the top pick among smart smoke & CO detectors under $100, rated 4.4 stars across 362 customer reviews.
KiddeSmart Smoke & CO Detector with Ring
$69.97
First AlertSMCO410 Smoke Detector & CO Alarm
$64.97
KiddeSmart Smoke Alarm (P4010ACS-WF)
$40.79
HeimanMatter Smoke Detector S1-M
$39.99
HeimanSmart CO Alarm
17% OFF$59.99$49.99
YoLinkPhotoelectric Smoke Alarm
$49.99
X-SenseSC07-MR Smart Smoke & CO Alarm
22% OFF$45.99$35.99- Price alerts
Smoke & CO Detectors under $100, updated as prices fall
We check the price of every Smoke & CO Detector in the catalog daily, and email you the ones that drop into this range.
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Frequently asked questions
What are the best smart smoke & CO detectors under $100?
Kidde Smart Smoke & CO Detector with Ring, First Alert SMCO410 Smoke Detector & CO Alarm and Kidde Smart Smoke Alarm (P4010ACS-WF) lead our ranking of smart smoke & CO detectors under $100, ordered by customer rating weighted by how many reviews back it. The full list compares 7 products in this price range.
How many smart smoke & CO detectors cost less than $100?
This page tracks 7 smart smoke & CO detectors under $100 from 5 brands, with prices starting at $35.99.
Are these prices up to date?
Prices come from each product's Amazon listing and are re-checked continuously, so every card shows the latest price we have. A product whose price rises above $100 drops off this list on the next update.
Looking for more than $100?
See all the smoke & CO detectors in the catalog, compared side by side on specs, price and rating.