The Best Smart Smoke Detectors of 2026
By Ethan Halfhide · Updated
The best smart smoke detector in 2026 does one thing a traditional alarm cannot: it tells you there is a fire when you are not home. Beyond the phone alert, the differences that matter are whether the unit also detects carbon monoxide, whether alarms interconnect so every device sounds at once, and whether it needs a hub or subscription. Here are the six alarms we recommend.
The Best Smart Smoke Detectors of 2026
How we ranked them
Every pick is a UL-listed alarm first and a smart device second. We ranked on combined smoke and carbon monoxide detection, sensor type (photoelectric, ionisation or dual), whether units interconnect wirelessly so one alarm triggers all, phone alert reliability, hub and subscription requirements, hardwired versus battery installation, expected sensor lifespan, and integration with Alexa, Google Home, HomeKit and Matter.
Fire is only half the story, so read this alongside our best carbon monoxide detector guide, and treat alarms as one layer of a wider setup covering best home security systems and the rest of your smart home devices.
What each alarm is best for
- First Alert Onelink Safe & Sound — Best overall: A ceiling-mounted combination smoke and CO alarm with a full-range speaker and Alexa built in, so it doubles as a smart speaker. Location-specific voice alerts tell you which room is affected.
- Google Nest Protect — Best app and alerts: Split-spectrum sensing, spoken alerts, a nightlight and the best-designed app in the category. Still the benchmark for how a smart alarm should communicate.
- X-Sense XS01-WT — Best value: The value pick. Wi-Fi connected, interconnects with other X-Sense units, ten-year sealed battery and no subscription. Smoke only, so pair it with a separate CO alarm.
- Kidde Smart Smoke and CO Alarm — Hardwired replacement: Combination detection with hardwired and battery options and straightforward app alerts. A sensible replacement for existing hardwired Kidde units.
- Ring Alarm Smoke and CO Listener — Retrofitting existing alarms: Not a detector at all: it listens for your existing alarms and pushes a notification. The cheapest way to make dumb alarms smart if they are still in date.
- SimpliSafe Smoke Detector — SimpliSafe households: Integrates with the SimpliSafe security system and its monitoring plans, which can dispatch the fire service. The right choice only if you already run SimpliSafe.
The verdict
For most homes the First Alert Onelink Safe & Sound is the best smart smoke detector of 2026: it covers both smoke and carbon monoxide, works with Alexa and HomeKit, and the built-in speaker earns its place on the ceiling. The Google Nest Protect is the better pick if app quality and spoken alerts matter most. If you need coverage across several rooms without a large outlay, buy multiple X-Sense XS01-WT units and add a dedicated CO alarm alongside them.
The best smart smoke detectors, ranked
First Alert
First Alert Onelink Safe & SoundDiscontinued hardwired smoke and CO alarm with built-in Alexa and Apple HomeKit
- +Smoke and CO detection with Amazon Alexa built in
- +HomeKit-enabled accessory
- −Discontinued: First Alert lists model 1039102 as discontinued
- −Requires 120V hardwiring to a junction box
Discontinued by Google in the US store; still supported, with First Alert SC5 named as the replacement
- +Still supported by Google for existing owners
- +Split-Spectrum smoke sensor plus 10-year CO sensor in one unit
- −Discontinued: the Google Store says Nest Protect is no longer available
- −No new units from Google, so you cannot add matching alarms
- +Great value in multipacks
- +Ten-year sealed battery
- −Smoke only, no CO
- −Basic app
Kidde
Kidde Smart Smoke + CO Alarm (30CUAR-W)Hardwired Wi-Fi smoke and CO alarm with app alerts, voice alerts and Alexa and Google Home support
- +Smoke and CO detection with Kidde app notifications
- +One smart alarm adds phone alerts for existing Kidde hardwired alarms
- −Not listed on Kidde's US online store as of October 2026
- −Needs 120V hardwiring; batteries are backup only
- +Cheap retrofit
- +Works with existing alarms
- −Requires a Ring Alarm base station
- −Not a detector itself
- +Professional monitoring can dispatch fire services
- +Simple peel-and-stick install
- −Needs a SimpliSafe base station
- −Monitoring subscription for dispatch
Related guides
Frequently asked questions
Do smart smoke detectors need a hub?
Most do not. Units like the First Alert Onelink Safe & Sound, Google Nest Protect and X-Sense XS01-WT connect directly to your Wi-Fi. Alarms tied to a security ecosystem, such as the SimpliSafe and Ring products, do require that system base station to function.
Should I buy a combination smoke and carbon monoxide alarm?
In most cases yes. Combination units cover both hazards from one ceiling position and one app, and carbon monoxide is the risk people are least likely to notice. If you buy smoke-only alarms, add dedicated CO detectors near sleeping areas and any fuel-burning appliance.
How long do smart smoke detectors last?
Smoke sensors degrade over time, so almost every alarm carries a ten-year replacement date printed on the unit, regardless of battery life. Carbon monoxide sensors often expire sooner, typically after seven to ten years. Replace the whole device at the printed date rather than just changing batteries.