Aqara UWB Smart Lock U400
Best for keyless entry with smart-home integration.
8.2 Shortlist Score
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Security
Best Smart Locks for Keyless Home Entry
Updated June 2026 · By The Shortlist Editorial Team
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Going keyless means trusting an app, a battery, and a deadbolt to do what a key always did. The hardest trade-off here is convenience versus fallback: auto-unlock and shared codes are great until the battery dies or Wi-Fi drops. This guide compares smart locks by power and backup options, smart-home fit across HomeKit, Alexa, Google, and Matter, and how access codes and entry logs actually work day to day.
Who this is for
- Renters who want keyless entry without replacing the exterior keyway
- Households that share access with family, guests, or a cleaner via codes
- Owners standardizing the door on HomeKit, Alexa, Google, or Matter
- Anyone who wants a keypad or fingerprint fallback over a phone-only lock
How we picked
We shortlist by how people actually shop for app-controlled entry: front-door retrofit versus full deadbolt swap, who needs guest codes, and which ecosystem already runs the house. Picks rest on published specs and editorial comparison, weighing power and low-battery backup, Matter and assistant compatibility, and access-code plus auto-unlock behavior. The Shortlist stays curated, not exhaustive, and leans on scenario over a single verdict.
Inclusion is an editorial decision — never a purchased placement — and rankings are never influenced by commissions.
What to compare
Power & low-battery backupBattery life, low-battery alerts, and an emergency keyway or external jump.
Smart-home & Matter fitHomeKit, Alexa, Google, and Matter support, plus whether control works locally.
Access codes & auto-unlockGuest and one-time codes, schedules, and reliable geofenced auto-unlock.
Install fitRetrofit over your existing deadbolt vs a full deadbolt replacement.
Keypad & biometric fallbackPhysical key, PIN pad, or fingerprint entry when the phone or network is out.
The shortlist
Top picks to compare
Aqara Smart Lock U300 Upgraded Version
Best for local storage instead of cloud subscriptions.
8.2 Shortlist Score
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eufy Security Smart Lock FamiLock S3 Max with Palm Vein
Best for keyless entry with smart-home integration.
8.0 Shortlist Score
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Aqara Smart Lock U100
Best for keyless entry with smart-home integration.
7.8 Shortlist Score
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Schlage Encode Smart Wi-Fi Deadbolt Lock with Touchscreen
Best for keyless entry with smart-home integration.
7.8 Shortlist Score
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eufy Security Video Smart Lock E330
Best for keyless entry with smart-home integration.
7.4 Shortlist Score
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Also considered
More options we evaluated that didn’t make the top picks above. Browse the full lineup on the Smart Security & Home Control page.
- Yale Security Assure Lock 2 Deadbolt Yale 7.4
- Google Nest x Yale Lock Google Nest 7.4
- ULTRALOQ Bolt Fingerprint Smart Lock with Door Sensor ULTRALOQ 7.4
- ULTRALOQ U-Bolt Pro WiFi Smart Lock with Door Sensor ULTRALOQ 7.4
- Lockly Secure Plus Bluetooth Smart Door Lock Lockly 7.4
- Kwikset Halo Wi-Fi Smart Lock Kwikset 7.4
At a glance
Comparison
| Product | Brand | Shortlist Score | Best for |
|---|---|---|---|
| Aqara UWB Smart Lock U400 | Aqara | 8.2 | Keyless entry with smart-home integration |
| Aqara Smart Lock U300 Upgraded Version | Aqara | 8.2 | Local storage instead of cloud subscriptions |
| eufy Security Smart Lock FamiLock S3 Max with Palm Vein | eufy | 8.0 | Keyless entry with smart-home integration |
| Aqara Smart Lock U100 | Aqara | 7.8 | Keyless entry with smart-home integration |
| Schlage Encode Smart Wi-Fi Deadbolt Lock with Touchscreen | Schlage | 7.8 | Keyless entry with smart-home integration |
| eufy Security Video Smart Lock E330 | eufy | 7.4 | Keyless entry with smart-home integration |
Shortlist Score is an editorial signal (published 6.8–9.6) — how we score.
Before you buy
- Measure door thickness and bore size against the lock's fit range
- Confirm retrofit compatibility if you must keep your existing keys
- Check it unlocks locally without internet and how it warns of low battery
- Verify the ecosystem and whether a separate hub or bridge is required
FAQ
Retrofit my existing deadbolt or replace the whole lock for keyless entry?
It depends on your door and goals. Retrofit units keep your exterior keyway and existing keys, mounting over the interior thumbturn, which suits renters and quick upgrades. Full-replacement locks add keypads, fingerprint readers, or true keyless exteriors. Check door thickness, bore size, and whether you want a physical key fallback at all.
If the battery dies or Wi-Fi drops, how do I still get in the door?
Every smart lock should have a fallback, and which one you accept is a core buying decision. Many keep a traditional keyway or take a 9V jump from outside; others rely on a backup PIN pad or fingerprint reader that still works offline since the lock runs locally. Confirm the lock works without internet for entry, and check the low-battery warning window so a dead battery never strands you outside.
Where should I buy, and do prices change?
We link out to Amazon for current pricing and availability on security, which shift over time. Confirm the latest configuration, bundle, and stock on the retailer page before buying.