Updated November 2026
Data from the official Nuki and TP-Link sites.
2026 verdict
At a covered front entrance, the TP-Link Tapo DL100 takes this smart lock pairing ahead of the Nuki Smart Lock Ultra on battery life, weather sealing and a built-in keypad.
It is rated for 10 months on four AA cells against 6 months, carries IP54 on its exterior assembly, and its backlit keypad brings one-time guest codes, anti-peep entry and a doorbell button. The Nuki Smart Lock Ultra is the better reviewed lock and wins on smart home reach: Matter over Thread with Apple Home, Google, Alexa, SmartThings and Home Assistant, plus built-in Wi-Fi, Bluetooth and hands-free auto-unlock. They also fit different doors, since the Nuki is a retrofit for European cylinders and the Tapo a keypad deadbolt for standard bores. Choose the TP-Link Tapo DL100 for a keypad deadbolt that does not need Apple, and the Nuki Smart Lock Ultra for a European door in a Matter or Apple home.
News by email
Still comparing? Get what's new by email
New releases and the smart home news worth knowing, in your inbox.
No spam. Unsubscribe in one click.
| Feature | Nuki Smart Lock Ultra | TP-Link Tapo DL100 | Winner |
|---|---|---|---|
| Weather Resistance | NO | IP54 | TP-Link Tapo DL100 |
| Battery Life | 6 months | 10 months | TP-Link Tapo DL100 |
| Connectivity | 2.4 GHz WiFi, Bluetooth, Thread Protocol | 2.4 GHz WiFi, Bluetooth | Nuki Smart Lock Ultra |
| Integrations | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Google Home, Alexa, Samsung SmartThings | Nuki Smart Lock Ultra |
| Lock/Unlock System | Remote, Bluetooth, Passcode, Fingerprint, Physical Key | Remote, Bluetooth, Passcode, Physical Key | Nuki Smart Lock Ultra |
| One-Time Password | Keypad required | YES | TP-Link Tapo DL100 |
| Anti-peep Password | NO | YES | TP-Link Tapo DL100 |
| Doorbell | NO | YES | TP-Link Tapo DL100 |
| Local Control | YES | NO | Nuki Smart Lock Ultra |
| Rating | 4.5 | 4.5 | Tie |
| Emergency Fingerprint | NO | NO | Tie |
What the differences mean
Door type
The Nuki Smart Lock Ultra mounts over a European cylinder on the inside of the door, keeping your key. The TP-Link Tapo DL100 replaces a deadbolt and fits standard 54 mm and 38 mm bores. Check your door before anything else.
Smart home platforms
The Nuki Smart Lock Ultra works with Apple Home, Google Home, Alexa, SmartThings and Home Assistant through Matter over Thread. The TP-Link Tapo DL100 works with Alexa, Google Home and SmartThings, with no HomeKit and no Matter.
Keypad
The TP-Link Tapo DL100 has a backlit keypad on the door, with guest codes, anti-peep entry and a doorbell button. On the Nuki Smart Lock Ultra, codes and fingerprints need the separate Nuki keypad.
Power
The TP-Link Tapo DL100 runs on four AA batteries rated for 10 months, with a USB-C emergency port. The Nuki Smart Lock Ultra uses a rechargeable built-in battery rated for 6 months and has no backup.
Weather
The TP-Link Tapo DL100 exterior is IP54 for a sheltered doorway. The Nuki Smart Lock Ultra sits inside the door and has no weather rating, which matters less since it is not exposed.
Which one to buy if
- your door has a European cylinder
The Nuki Smart Lock Ultra is built to retrofit over it without changing the lock.
- your home runs on Apple Home
The Nuki Smart Lock Ultra joins Apple Home through Matter; the TP-Link Tapo DL100 has no HomeKit.
- you want guests to use a code on the door
The TP-Link Tapo DL100 has a built-in keypad with one-time codes; the Nuki needs an accessory.
- you would rather swap batteries rarely
The TP-Link Tapo DL100 is rated for 10 months against 6 on the Nuki Smart Lock Ultra.
- + Connectivity: 2.4 GHz WiFi, Bluetooth, Thread Protocol
- + Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
- + Lock/Unlock System: Remote, Bluetooth, Passcode, Fingerprint, Physical Key
- - Weather Resistance: NO vs IP54
- - Battery Life: 6 months vs 10 months
Winner
14% OFF
$59.99
$69.99
- + Weather Resistance: IP54
- + Battery Life: 10 months
- + One-Time Password: YES
- - Connectivity: 2.4 GHz WiFi, Bluetooth vs 2.4 GHz WiFi, Bluetooth, Thread Protocol
- - Integrations: Google Home, Alexa, Samsung SmartThings vs Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
What owners say
Owners of both locks praise an app that makes daily use easy and an install that goes quicker than expected. Nuki Smart Lock Ultra owners, many coming from older Nuki models, single out a faster and quieter motor, a premium build, guided installation in about an hour and Apple Home setup by QR code, and their complaints are the price, a cylinder length that is tricky to set and one too-short screw. TP-Link Tapo DL100 owners talk about the auto-lock timer ending the doubt about whether the house is locked, per-person codes and the activity log, but warn that water got through the key cylinder on exposed doors, that battery life falls short with Wi-Fi on all day and that notifications sometimes drop.
Frequently Asked Questions
Which is better: Nuki Smart Lock Ultra or TP-Link Tapo DL100?
The TP-Link Tapo DL100 comes out ahead on battery life, IP54 weather sealing and a keypad with guest codes and a doorbell button. The Nuki Smart Lock Ultra is better reviewed and wins on integrations, with Matter, Apple Home and hands-free auto-unlock, for European cylinder doors.
What is the biggest difference between the Nuki Smart Lock Ultra and the TP-Link Tapo DL100?
The kind of lock. The Nuki Smart Lock Ultra is a retrofit that turns a European cylinder from the inside, while the TP-Link Tapo DL100 is a keypad deadbolt for standard bores.
Does the TP-Link Tapo DL100 work with Apple Home or Matter?
No. The TP-Link Tapo DL100 works with Alexa, Google Home and SmartThings. The Nuki Smart Lock Ultra supports Apple Home and Matter over Thread.
Who should buy the Nuki Smart Lock Ultra?
Owners of European cylinder doors who want a premium retrofit with Matter, Apple Home, built-in Wi-Fi and hands-free auto-unlock.
Who should buy the TP-Link Tapo DL100?
Budget buyers with a standard deadbolt on a sheltered door who want a keypad, auto-lock and guest codes, on Alexa, Google Home or SmartThings.
Spotted something wrong on this page? Tell us and we will fix it.
Our store on AmazonShop our ideas on AmazonLists of the smart home setups we would put together ourselves, ready to add to your Amazon cart.Shop on AmazonFull comparison table
Compare all 58 Door Locks side by side
You are looking at two of them. The full table lines up all Door Locks in the catalog with the same specs, so you can filter by what you need and sort by price or rating.
- 58 Door Locks
- 56 specs compared
- 52 filters
- Door Locks
22% OFF
FamiLock E32
4.7(32)$139.99$179.99 - Door Locks
Palm Lock
4.6(862)$129.00 - Door Locks
FamiLock E40
4.6(87)$349.99 - Door Locks
Auto-Lock Bolt v2
4.5(713)$79.00 - Door Locks
Tapo DL105
4.5(210)$129.99 - Door Locks
Tapo DL130
4.5(86)$224.99 - Door Locks
35% OFF
4200 Series Smart Deadbolt with Door Lever
4.4(923)$109.97$169.99 - Door Locks
SwitchBot Lock Ultra Vision Combo
4.4(743) - Door Locks
Smart Lock C32
4.4(275)$79.99 - Door Locks
Lock Vision
4.4(14) - Door Locks
Encode
4.3(16.7K)$229.31 - Door Locks
15% OFF
Bolt SE
4.3(10.4K)$84.99$99.99 - Door Locks
Smart Lock Pro
4.3(1.2K) - Door Locks
23% OFF
Wi-Fi Smart Deadbolt DDL242X
4.3(1.2K)$84.99$109.99 - Door Locks
Security Smart Lock C30
4.3(442)$79.99 - Door Locks
Arrive
4.3(248)$199.46 - Door Locks
Smart Lock U600
4.3(33)£229.99 - Door Locks
24% OFFU-Bolt Pro WiFi
4.2(6.4K)$129.99$169.99 - Door Locks
29% OFFSmart Lock C220
4.2(4.4K)$119.99$169.99 - Door Locks
7% OFF
Nest x Yale Lock
4.2(2K)$224.00$239.99
- Buttons
20% OFFTapo S200B
4.6(1.6K)£11.98£14.99 - Buttons
17% OFFTapo S200D
4.2(291)$18.99$22.99 - Cameras
12% OFFTapo C100
4.4(29.2K)$21.99$24.99 - Cameras
Tapo C120
4.3(5.5K)$56.99 - Cameras
17% OFFTapo C210
4.5(23.4K)$24.99$29.99 - Cameras
25% OFFTapo SolarCam C402
4.1(5.1K)$44.99$59.99 - Cameras
37% OFFTapo TC34
4.3(43)£56.99£89.99 - Cameras
17% OFFKasa EC70
4.4(34.4K)$24.99$29.99 - Cameras
10% OFFKasa KC420WS
4.4(4.9K)$44.99$49.99 - Cameras
15% OFFTapo C200
4.5(42.8K)$22.99$26.99 - Cameras
7% OFFTapo C246D
4.5(912)$64.99$69.99 - Cameras
Tapo C260
4.6(735)$59.99 - Cameras
Tapo C320WS
4.4(7.7K)$44.99 - Cameras
29% OFFTapo C460
4.3(230)$84.99$119.99 - Cameras
18% OFFTapo C465
4.3(202)$114.99$139.99 - Cameras
Tapo C500
4.5(7.2K)$39.99 - Cameras
17% OFFTapo C545D
4.5(124)$99.99$119.99 - Cameras
5% OFFTapo C560WS
4.2(678)$94.99$99.99 - Cameras
Tapo C615F KIT
4.4(650)$119.99 - Cameras
37% OFFTapo C660
4.4(1.1K)$106.99$169.99