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The best smoke detectors and fire alarms you can buy

Cutting through the noise on what to actually buy.

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The best smoke detectors and fire alarms you can buy

AI-generated summary · updated September 10, 2026 · verify details before purchase.

  1. First Alert SA303CN3 Battery Powered Smoke Detector
    Best budget pick First Alert

    First Alert SA303CN3 Battery Powered Smoke Detector

    4.7/5 $48.99 Only 3 left

    Reliable, affordable ionization sensor with a loud 85dB alarm and easy battery pull-tab.

    • Very affordable
    • Easy setup
    • Loud alarm
    • No carbon monoxide detection
    View on Amazon
  2. Kidde KN-COSM-IBA Hardwired Smoke and Carbon Monoxide Detector
    Best hardwired combo Kidde

    Kidde KN-COSM-IBA Hardwired Smoke and Carbon Monoxide Detector

    4.6/5 $118.00

    Hardwired dual-sensor smoke and CO detector with voice alerts and battery backup.

    • Voice alerts
    • Dual detection
    • Battery backup
    • Hardwired installation required
    View on Amazon
  3. Google Nest Protect (2nd Gen) - Smoke Alarm
    Smart home integration Google

    Google Nest Protect (2nd Gen) - Smoke Alarm

    4.5/5 $329.99 Only 15 left

    Smart alarm with split-spectrum sensor, speaks to you, and integrates with Google Home and mobile alerts.

    • Smart features
    • Self-testing
    • Voice alerts
    • Expensive
    • Requires Wi-Fi for full functionality
    View on Amazon
  4. First Alert 3120B Hardwired Smoke Alarm with Battery Backup
    Best hardwired value First Alert

    First Alert 3120B Hardwired Smoke Alarm with Battery Backup

    4.6/5 $44.16 Only 4 left

    Hardwired ionization alarm with battery backup and test/silence button, reliable and affordable.

    • Dependable
    • Battery backup
    • Easy to maintain
    • No carbon monoxide detection
    View on Amazon
  5. X-Sense SC01-BN Wireless Smoke and Carbon Monoxide Detector
    Budget smart option X-Sense

    X-Sense SC01-BN Wireless Smoke and Carbon Monoxide Detector

    4.4/5 $237.48

    Wireless interconnectable smoke and CO alarm with photoelectric sensor and voice prompts.

    • Wireless interconnect
    • Voice prompts
    • Affordable smart features
    • No app connectivity
    View on Amazon
  6. Safe and Sound Audio System and Smart Smoke Alarm
    Multi-functional Safe and Sound

    Safe and Sound Audio System and Smart Smoke Alarm

    4.2/5 $396.60 Only 9 left

    Combines a smart smoke alarm with built-in speaker, Alexa, and LED nightlight.

    • Built-in speaker
    • Alexa support
    • Nightlight
    • Bulky
    • Mixed user reviews
    View on Amazon
  7. Kidde P3010K-CO Combination Smoke and Carbon Monoxide Alarm
    Best battery-powered combo Kidde

    Kidde P3010K-CO Combination Smoke and Carbon Monoxide Alarm

    4.5/5 $55.00 Currently unavailable

    Battery-operated with sealed 10-year lithium battery, dual smoke and CO detection, and voice alerts.

    • 10-year battery
    • Dual detection
    • Voice alerts
    • Non-replaceable battery
    View on Amazon

What to consider before buying

When choosing a smoke detector, consider whether you need battery-powered, hardwired, or smart features. Battery models are easiest to install, while hardwired alarms offer reliable interconnectivity. For added safety, pick a combination smoke and carbon monoxide detector. Smart options like Nest Protect provide remote alerts and self-testing but cost more. Always check local building codes for required detectors.

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