Nest Protect Smoke and Carbon Monoxide Alarm

Last updated date: March 29, 2019

Review Melt Score
9.4

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We looked at the top 1 Smoke Detectors and dug through the reviews from 9 of the most popular review sites including BestReviews, New York Times Wirecutter, Tom's Guide, Trusted Reviews, Pocket-lint, Top Ten Reviews, PC Magazine, CNET and more. Through this analysis, we've determined the best Smoke Detector you should buy.

Overall Take

In our analysis of 68 expert reviews, the Nest Nest Protect Smoke and Carbon Monoxide Alarm placed 1st when we looked at the top 10 products in the category. For the full ranking, see below.

Editor's Note March 29, 2019:
Checkout The Best Smoke Detector for a detailed review of all the top smoke detectors.

Expert Summarized Score
9.4
9 expert reviews
User Summarized Score
9.3
8,611 user reviews
Our Favorite Video Reviews
What experts liked
Like other Nest products, this combination smoke/CO2 detector is "smart" and compatible with numerous devices.
- BestReviews
The second-generation Nest Protect smoke and carbon monoxide alarm is the best smart smoke alarm for everyone because it’s the easiest to install and use, and it reliably and calmly alerts you to potential danger whether you're home or away using a combination of voice, siren, and smartphone alerts.
- New York Times Wirecutter
November 15, 2018 | Full review
The Nest Protect uses a split-spectrum sensor that Nest says is good at detecting both slow-smouldering fires as well as fast-burning ones.
- Tom's Guide
November 20, 2018 | Full review
Self-checks, Pathlight to help you find your way around and Works with Nest rules just add to the smart simplicity of this device.
- Trusted Reviews
December 12, 2018 | Full review
Nest Protect is also compatible with IFTTT, meaning you can do other clever things with it too.
- Pocket-lint
November 21, 2018 | Full review
Nest Protect goes a step further by adding voice alerts that calmly tell you what kind of danger is present, where it is and how to proceed.
- Top Ten Reviews
June 15, 2018 | Full review
The Nest Protect Smoke & Carbon Monoxide Alarm is another solid smart detector with ample functionality.
- Reviewed
December 12, 2018 | Full review
I particularly liked the Pathlight feature; when you walk under the Protect when the lights are out the light ring glows with a soft white light to guide your way.
- PC Magazine
January 17, 2014 | Full review
With a slimmer profile, a new in-app "silence" button that allows you to turn off smoke and CO alarms remotely (the original Nest Protect doesn't currently support this feature) and integration with the Nest Learning Thermostat , Nest Cam and IFTTT, this $99/£89 detector is the best connected one we've seen yet.
- CNET
July 27, 2015 | Full review
What experts didn't like
Requires some tech knowledge to set up and use.
- BestReviews
These alarms are expensive compared with a standard smoke and CO alarm.
- New York Times Wirecutter
November 15, 2018 | Full review
At $100, the Nest Protect is one of the most expensive, but also one of the most comprehensive, of the smart smoke detectors we've tested.
- Tom's Guide
November 20, 2018 | Full review
There’s no getting away from the fact that it’s expensive, however.
- Trusted Reviews
December 12, 2018 | Full review
It's an expensive bit of kit though – so you're probably wondering if it's worth the outlay and if all the bells and whistles are worthwhile.
- Pocket-lint
November 21, 2018 | Full review
Unfortunately, the device warranty is only two years, unlike the 10-year warranties of the First Alert Onelink and Kidde KN-COSM-B-RF.
- Top Ten Reviews
June 15, 2018 | Full review
The Nest Protect didn’t perform as well as some of its competitors in terms of responsiveness, taking 30 seconds or more after the alarm sounded to send notifications.
- Reviewed
December 12, 2018 | Full review
It has one other thing in common with the Learning Thermostat in that it carries a hefty price tag; at $129 (direct) it's significantly more expensive than what you'll pay for a typical smoke/CO alarm.
- PC Magazine
January 17, 2014 | Full review
The light bulb integrations weren't responsive enough for short smoke events, typically flashing several minutes after our test smoke dissipated.
- CNET
July 27, 2015 | Full review

From The Manufacturer

It’s time to expect more from your smoke alarm. Nest Protect has been redesigned from the inside out. It has a Split-Spectrum Sensor, tests itself automatically and lasts up to a decade. It’s also the first home alarm you can hush from your phone without any extra hardware required. And it tells you what’s wrong and can even alert your phone. Nest products are made to work together. And they can even work with lights, locks and other products in your home. The Nest Protect can alert the Nest Thermostat when it detects carbon monoxide and the Thermostat can turn off the furnace to try and reduce the leak while you get to safety. Nest is focused on making simple, human, delightful things. That’s how we’re creating the thoughtful home: A home that takes care of the people inside it and the world around it.

Overall Product Rankings

1. Nest Protect Smoke and Carbon Monoxide Alarm
Overall Score: 9.4
Expert Reviews: 9
3. Kidde Hardwire Smoke Alarm
Overall Score: 9.0
Expert Reviews: 9
4. Alert Pro 10 Year Battery Smoke Detector Fire Alarm
Overall Score: 8.9
Expert Reviews: 1
5. First Alert Interconnected Wireless Smoke Alarm
Overall Score: 8.4
Expert Reviews: 7
6. First Alert Dual-Sensor Smoke and Fire Alarm
Overall Score: 8.3
Expert Reviews: 7
8. Leeo Smart Alert Smoke/CO Remote Alarm Monitor
Overall Score: 7.8
Expert Reviews: 8
9. First Alert Smoke Alarm With Photoelectric Sensor
Overall Score: 7.4
Expert Reviews: 4
10. First Alert P1000
Overall Score: 6.5
Expert Reviews: 1

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