Kidde Smart Smoke + CO Alarm

Quick verdict

The Kidde Smart Alarm is a solid choice if you want phone notifications and wireless interconnect without paying Nest Protect prices. It does the safety job well. But from a smart home perspective, it is a dead end with no Home Assistant integration, no voice assistant support, and no public API. Buy it for the safety features, not for smart home integration.

Standout: Wireless interconnect for up to 6 alarms with smartphone notifications, at a significantly lower price than Nest Protect.

Last checked: 2026-03-25

Compatibility snapshot

Why it stands out

• wireless interconnect links up to 6 alarms so they all sound together
• smartphone notifications tell you which alarm triggered and whether it was smoke or CO
• more affordable than Nest Protect while offering similar wireless interconnect

Reasons to hesitate

• no Home Assistant integration and no public API
• cloud-dependent for all smart notification features
• no voice assistant support with Google Home, Alexa, or Apple Home

Best for

• homeowners who want interconnected smart smoke alarms with phone notifications at a lower price than Nest
• non-smart-home users who just want alerts on their phone when an alarm goes off

Avoid if

• you want to integrate smoke alarms into Home Assistant or any other smart home platform
• you need voice assistant support or cross-platform compatibility

Privacy and local-control notes

Cloud-dependent for smart notifications. Kidde app requires an account and sends alerts through their servers. The alarm itself functions normally without internet.

Home Assistant support: not currently recommended · integration path: none.

Buying reality check

Price notes: Noticeably cheaper than Nest Protect. Available in hardwired and battery models. No subscription required.

Compare side by side: see smoke alarm comparisons →