# What is the most compact smart lock available? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

What is the most compact smart lock available?

## Products

### Nuki Smart Lock Pro 5th Gen
```yaml
product: nuki-smart-lock-pro-5th-gen
brand: Nuki
price_gbp: 199.48
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
connectivity: Wi-Fi, Bluetooth, Thread, Matter
wifi_compatibility: Built-in Wi-Fi
lock_operation_methods: Smartphone, smartwatch, Auto Unlock, optional keypad, physical key
smartphone_app_availability: Android, iOS, Apple Watch
voice_assistant_compatibility: Amazon Alexa, Google Assistant, Apple HomeKit, Apple Siri
```

- **Price:** £199.48 [^1]
- **Summary:** The Nuki Smart Lock Pro 5th Gen is a compact retrofit smart lock with built-in Wi-Fi, Bluetooth, Thread, Matter support, and a rechargeable battery. It suits households wanting remote access, automatic unlocking, smart-home integration, and installation over an existing cylinder without drilling.
- **Ideal For:** It suits the search for the most compact smart lock because its compact body measures 57 mm in diameter by 70 mm deep and installs over an existing key without requiring cylinder replacement.
- **Additional Sources:** [^2], [^3]

### Yale Linus L2 Lite
```yaml
product: yale-linus-l2-lite
brand: Yale
price_gbp: 1971.09
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
connectivity: Matter over Thread and Bluetooth
wifi_compatibility: Requires optional Yale ConnectX Wi-Fi Bridge for remote control
lock_operation_methods: Yale Home app, Auto Unlock, KeySense, existing key, Yale Smart Keypad, Yale Dot
smartphone_app_availability: Yale Home app for Android and iOS
voice_assistant_compatibility: Amazon Alexa, Google Home, Apple Home, Samsung SmartThings
```

- **Price:** £1971.09 [^4]
- **Summary:** The Yale Linus L2 Lite is a compact, drill-free interior retrofit smart lock with Matter over Thread, Bluetooth, Auto Unlock, KeySense and digital key sharing. It suits renters and smart-home users who want app-based access and broad ecosystem support without replacing their exterior door hardware.
- **Ideal For:** It suits the question 'What is the most compact smart lock available?' because its round body measures 61 mm in diameter and 72 mm thick, weighs 260 g and uses three compact CR123 batteries.
- **Additional Sources:** [^5], [^5]

### tedee tedee PRO
```yaml
product: tedee-tedee-pro
brand: tedee
price_gbp: 295.89
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
connectivity: Bluetooth, WiFi via Tedee Bridge
bluetooth_range: 10
wifi_compatibility: WiFi via Tedee Bridge
lock_operation_methods: Tedee app, automatic locking and unlocking, voice assistants, keypad, key
smartphone_app_availability: Tedee app for iOS and Android
voice_assistant_compatibility: Siri, Google Assistant, Amazon Alexa
```

- **Price:** £295.89 [^6]
- **Summary:** tedee PRO is a compact, quiet smart lock with a rechargeable battery and Bluetooth connectivity. It works with the Tedee app, major voice assistants, smart-home systems, and optional keypad access, making it suitable for users seeking premium connected door control.
- **Ideal For:** tedee PRO suits the search for the most compact smart lock because it has a 45 mm maximum diameter and 55 mm depth, while also offering a quiet motor and integrated rechargeable battery.
- **Additional Sources:** [^7]

---
## References & Sources
[^1]: Nuki, accessed 2026-09-04. https://nuki.io/en/products/smart-lock-pro-5th-gen
[^2]: Galaxus, accessed 2026-09-04. https://www.galaxus.be/en/s4/product/nuki-smart-lock-pro-5th-gen-eu-cylinder-smartphone-access-control-57386537
[^3]: SmarterHOME, accessed 2026-09-04. https://smarterhome.sk/en/door-locks/nuki-smart-lock-pro-5th-gen-1824.html
[^4]: Yale South Africa, accessed 2026-09-04. https://yalehome.co.za/smart-home/smart-door-locks/
[^5]: electroshock.cz, accessed 2026-09-04. https://zabezpeceni-chytre-domacnosti.heureka.cz/yale-linus-smart-lock/
[^6]: tedee, accessed 2026-09-04. https://tedee.com/enau/product-info/tedee-pro/
[^7]: tedee.me, accessed 2026-09-04. https://tedee.me/pages/tedee-pro