Quick answer
Compare fingerprint access within compatible deadbolt formats, then check backup entry and credential administration. A fingerprint feature is not an independent security rating.
Research shortlist
Compare fingerprint access within compatible deadbolt formats, then check backup entry and credential administration. A fingerprint feature is not an independent security rating.
| Product | Research use case | Sourced features | Decision limit |
|---|---|---|---|
| Aqara Smart Lock U400 | Reader and accessory | Fingerprint: Yes; Lock type: Single-cylinder deadbolt; Physical key: Yes; mechanical key | Confirm the reader location and what is included; do not confuse built-in access with an optional keypad bundle. |
| ULTRALOQ Bolt Fingerprint Matter | Backup entry | Fingerprint: Yes; Lock type: Deadbolt; Physical key: Yes | U400 and ULTRALOQ document mechanical keys; E31 documents exterior USB-C temporary power. |
| eufy Smart Lock E31 | Credential management | Fingerprint: Yes; Lock type: Deadbolt; Emergency power: Exterior USB-C temporary power; not battery charging | Obtain limits for users, enrolment and deletion, and distinguish local administration from remote app control. |
What to check before buying
| Decision factor | What to establish |
|---|---|
| Reader and accessory | Confirm the reader location and what is included; do not confuse built-in access with an optional keypad bundle. |
| Backup entry | U400 and ULTRALOQ document mechanical keys; E31 documents exterior USB-C temporary power. |
| Credential management | Obtain limits for users, enrolment and deletion, and distinguish local administration from remote app control. |
| Door format | These are replacement deadbolts. Buyers retaining a mortise cylinder should instead assess the U200 keypad retrofit. |
Aqara Smart Lock U400
Why it belongs here: For reader and accessory, the US / Canada / Australia / New Zealand / Singapore record documents Fingerprint: Yes; Lock type: Single-cylinder deadbolt; Physical key: Yes; mechanical key; Emergency power: Third-party power bank.
Who should consider it: Buyers assessing reader and accessory who can meet the documented Aqara Smart Lock U400 installation and operating requirements.
Before choosing: Confirm the reader location and what is included; do not confuse built-in access with an optional keypad bundle.
Evidence limit: Aqara Smart Lock U400 is assessed for reader and accessory using manufacturer documentation; this does not establish a comparative security test result.
Full sourced specification recordULTRALOQ Bolt Fingerprint Matter
Why it belongs here: For backup entry, the US record documents Fingerprint: Yes; Lock type: Deadbolt; Physical key: Yes; Emergency power: No Micro-USB backup power interface.
Who should consider it: Buyers assessing backup entry who can meet the documented ULTRALOQ Bolt Fingerprint Matter installation and operating requirements.
Before choosing: U400 and ULTRALOQ document mechanical keys; E31 documents exterior USB-C temporary power.
Evidence limit: ULTRALOQ Bolt Fingerprint Matter is assessed for backup entry using manufacturer documentation; this does not establish a comparative security test result.
Full sourced specification recordeufy Smart Lock E31
Why it belongs here: For credential management, the Australia record documents Fingerprint: Yes; Lock type: Deadbolt; Emergency power: Exterior USB-C temporary power; not battery charging.
Who should consider it: Buyers assessing credential management who can meet the documented eufy Smart Lock E31 installation and operating requirements.
Before choosing: Obtain limits for users, enrolment and deletion, and distinguish local administration from remote app control.
Evidence limit: eufy Smart Lock E31 is assessed for credential management using manufacturer documentation; this does not establish a comparative security test result.
Full sourced specification recordHow we chose
Selection centres on reader and accessory, backup entry, credential management, door format. Compare fingerprint access within compatible deadbolt formats, then check backup entry and credential administration. A fingerprint feature is not an independent security rating. This is source-based research, not a hands-on test or star-rated ranking.
Read the complete methodologyCommon questions
What if a fingerprint is not recognised?
Keep the exact model’s documented backup method available and test it with the door open.
Does Matter manage every fingerprint remotely?
Do not assume that. Verify enrolment and deletion in the vendor documentation and your chosen platform.
Sources and verification
Official documentation consulted 5 October 2026. Specifications are manufacturer statements, not independent measurements. Check the exact regional model before buying.
- Aqara Smart Lock U400 — Official product or announcement
- Aqara Smart Lock U400 — Official supporting specifications/support
- ULTRALOQ Bolt Fingerprint Matter — Official product or announcement
- ULTRALOQ Bolt Fingerprint Matter — Official supporting specifications/support
- ULTRALOQ Bolt Fingerprint Matter — Official supporting specifications/support
- eufy Smart Lock E31 — Official product or announcement
- eufy Smart Lock E31 — Official supporting specifications/support
