Aqara Smart Lock U300

Quick verdict

The U300 goes all-in. It replaces your entire door lock and handle. You get the same Matter-over-Thread local control and Apple Home Key as the U200, but in a full-replacement form factor. Installation is more work than a retrofit, and fingerprint data still does not reach HA. Best for new builds or anyone ready to swap out their whole lock set.

Standout: Full door replacement smart lock with Matter over Thread and Apple Home Key.

Last checked: 2026-03-22

Compatibility snapshot

Why it stands out

• full door replacement lock that replaces both the deadbolt and handle in one unit
• Matter over Thread for local lock/unlock control in Home Assistant
• Apple Home Key and fingerprint unlock for convenient daily entry

Reasons to hesitate

• fingerprint sensor not exposed to Home Assistant, same limitation as the U200
• full door lock replacement is a more involved installation than a retrofit deadbolt
• premium price reflects the all-in-one form factor

Best for

• homeowners who want a single unit replacing both deadbolt and handle
• Apple Home Key users who prefer a full-door lock over a retrofit deadbolt

Avoid if

• you want a simple retrofit lock that installs over your existing deadbolt
• you need fingerprint events in Home Assistant for automations

Privacy and local-control notes

Lock/unlock is local via Matter over Thread. Fingerprint and advanced features require Aqara app. Biometric data stays on-device.

Home Assistant support: supported · integration path: Matter over Thread (local lock/unlock; requires a Thread border router).

Buying reality check

Price notes: The most expensive Aqara lock, but you are replacing your entire door hardware in one shot.

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