Best for Alarm/siren loudness (if included)
Aqara Smart Lock U100
4.0 attribute score
Highest scored product for this attribute based on supporting review evidence.
Best Smart Locks for Alarm/siren loudness (if included)
Alarm/siren loudness (if included) Decision Dashboard
Safest pick
Schlage Encode Smart Lock
3.5 attribute score
Balances the attribute score, supporting reviews, and overall product strength.
Most evidence
Aqara U50 Smart Lock
2 supporting reviews
Has the broadest review evidence for this attribute.
Best overall product
SwitchBot Lock Ultra
4.2 overall score
Strongest overall product among items with scored evidence for this attribute.
The built-in speaker/alarm was viewed as useful rather than extremely loud, with reviewers appreciating open-door and warning alerts.
Pros: Fingerprint, Value and Price
Cons: Hub requirement, Battery
Alarm loudness was split: one review called the siren quiet, while a locksmith found it very loud and annoying.
Pros: Installation and Setup, App
Cons: Battery, Locking motor
Alarm and sound controls are useful and adjustable, but one reviewer found the default voice volume very loud and hub-dependent to change.
Pros: Value and Price, Guest Codes and Access
Cons: Industrial design, Hub requirement
The keypad speaker is clearly audible, but one reviewer found the voice prompts annoying enough to lower the score.
Pros: Installation and Setup, Industrial design
Cons: Hub requirement, Auto-lock
The built-in alarm was criticized as too quiet, even by reviewers who liked having forced-entry detection available.
Pros: Value and Price, Installation and Setup
Cons: Keypad, App