Works with Matter
Can you ask Alexa if your front door is locked?
Only sometimes. Alexa supports lock-status queries like "Alexa, is the front door locked?", but Alexa is just the messenger - it can only relay a lock state that some device actually reports. That works with compatible smart locks from brands like Yale, Schlage, August and Kwikset. A contact sensor or camera cannot answer the question, because neither knows whether the bolt is thrown. If you do not want to replace your lock with a motorised one, you need a device that senses the state of your existing lock.
Locksure monitors your lock - it shows locked or unlocked. It does not lock or unlock the door.
Shop Locksure - from £44.99Locksure works with Alexa. It senses the position of your existing thumb-turn or key cylinder, so your lock's true state becomes part of your Alexa smart home - alerts and routines included - without fitting a new lock. From £44.99, UK-made, no subscription for core alerts.
Common questions
Why can't Alexa tell me if my door is locked with just an Echo and a door sensor?
A door or contact sensor reports open or closed only. Alexa has no lock state to read unless a linked device exposes one, so with sensors alone the honest answer is about door position, not the lock.
Which devices let Alexa know the lock state?
Compatible smart locks (Yale, Schlage, August, Kwikset and others) expose lock status to Alexa, or a lock-state monitor like Locksure, which reads your existing lock without motorising it.
Does asking Alexa to unlock a door work too?
On supported smart locks, yes, usually behind a voice PIN. Locksure is monitor-only by design: it reports state but never moves the lock, which many households prefer for a front door.
From £44.99 · fits your existing lock · no subscription for core alerts · UK-made · see the full comparison
Information about Alexa is based on publicly available sources, checked August 2026. Alexa is a trademark of Amazon; this is an independent comparison, not affiliated with or endorsed by Amazon.