In the smart lock segment of 2026, three concrete developments stand out: the Matter protocol in Nuki 4.0, Apple Home Key in the Schlage Encode Plus, and offline PIN codes in Igloohome that work without any internet connection. Installing smart door locks is a DIY job - no locksmith needed, no drilling required.
From Tedee GO at 129 EUR - a typical Bluetooth smart lock for apartment doors - to Schlage at 229 EUR. Any of these smart locks can turn a door into part of a smart home without major modifications. Seven models, each suited to a different use case.
Quick Overview of Smart Door Locks 2026
| Model | Connection | Key feature | Price |
|---|---|---|---|
| Tedee GO | Bluetooth | Ultra-slim, auto-unlock | ~129 EUR |
| Yale Linus Smart Lock | Z-Wave/Zigbee | Tamper alarm, DIN | ~149 EUR |
| Philips 5100 Series | Bluetooth/WiFi | Fingerprint + PIN | ~159 EUR |
| Igloohome Bolt | Bluetooth | Offline PIN codes | ~179 EUR |
| August Smart Lock Pro | Z-Wave/Zigbee | Retrofit, keeps original key | ~189 EUR |
| Nuki Smart Lock 4.0 | BT+WiFi+Matter | Auto-unlock, Matter | ~199 EUR |
| Schlage Encode Plus | WiFi+BLE | Apple Home Key | ~229 EUR |
1. Tedee GO
Photo: Tedee, tedee.com
Tedee GO is the slimmest smart lock on this list - designed as an upgrade to your existing euro cylinder without replacing the lock itself. It mounts on the interior side of the door in about 15 minutes without a locksmith. The Bluetooth connection and auto-unlock function recognize when you approach and open the door automatically.
Battery life is 4-6 months with normal use. The Tedee app is clean and reliable. For WiFi control from a remote location, a Tedee Bridge is needed (additional ~49 EUR). Compatible with Google Home and Amazon Alexa.
| Specification | Value |
|---|---|
| Connection | Bluetooth 5.0 |
| Installation | Euro cylinder (DIY, 15 min) |
| Auto-unlock | YES |
| Battery | 4-6 months |
| WiFi | With Tedee Bridge (additional) |
| Compatibility | Google Home, Alexa |
| Price | ~129 EUR |
Pros: Easiest installation on the list; ultra-slim design; reliable auto-unlock; long battery life; original key still works
Cons: WiFi requires an additional Bridge (~49 EUR); no fingerprint reader; smaller brand recognition than Nuki or Yale; no Z-Wave protocol
Our opinion: Tedee GO is the right choice for renters who want a keyless smart lock without major modifications. Installation amounts to swapping the interior cylinder rosette - no drilling, no locksmith. For 129 EUR you get auto-unlock and app control. The basics are covered.
2. Yale Linus Smart Lock
Photo: Yale, yalehome.com
Yale Linus Smart Lock is a DIN standard compatible model - fitting most European locks in apartments and houses. Z-Wave and Zigbee support makes it ideal for integration into existing smart home systems (SmartThings, Home Assistant, Fibaro). The tamper alarm sends a notification if someone physically tries to manipulate the lock.
Yale is one of the oldest lock brands in the world - 160 years of experience. The Linus model comes with the Yale Connect Hub for WiFi and remote access. A guest code keypad is available as an add-on.
| Specification | Value |
|---|---|
| Connection | Z-Wave Plus / Zigbee |
| Standard | DIN - European standard |
| Alarm | Active tamper alarm |
| Hub | Yale Connect Hub (included) |
| App | Yale Home app |
| Compatibility | SmartThings, Home Assistant |
| Price | ~149 EUR |
Pros: Z-Wave/Zigbee - ideal for Home Assistant; DIN standard for EU doors; tamper alarm; Yale brand reliability; hub included; local protocol with no cloud dependency
Cons: No fingerprint reader; more conservative design; Z-Wave hub requires configuration; app less polished than Nuki
Our opinion: Yale Linus Smart Lock is for Home Assistant or SmartThings users who want local Z-Wave control without cloud dependency. The tamper alarm is a specific feature competitors lack. For apartments in older buildings with DIN cylinders, this is a natural fit.
3. Philips 5100 Series
Photo: Philips, philips.com
Philips 5100 Series has something rare in this price range: a fingerprint reader. Three unlocking methods - fingerprint, PIN code on the keypad and the smartphone app. For people who don't carry keys or want quick access without pulling out their phone, the fingerprint reader is a genuine advantage. Up to 100 fingerprints can be stored.
Bluetooth for app control, Zigbee for smart home integration. Runs on 4x AA batteries (6-12 months life). IP54 splash protection makes it suitable for entrance doors exposed to the elements.
| Specification | Value |
|---|---|
| Fingerprint | YES - up to 100 users |
| Access | Finger / PIN / App |
| Connection | Bluetooth + Zigbee |
| Battery | 4x AA, 6-12 months |
| Protection | IP54 |
| Material | Stainless steel |
| Price | ~159 EUR |
Pros: Fingerprint reader - unique in its class; 3 access methods; IP54 protection; 100 user profiles; Zigbee integration; steel housing
Cons: Smaller Philips Smart Lock service network in some regions; bulkier design; no Matter support; Philips Home app less intuitive than Nuki
Our opinion: Philips 5100 is for households with multiple people where keys are a constant headache - children, elderly residents, delivery workers. Fingerprint access is the fastest and most reliable way to get through the door. For 159 EUR you get biometric security without an installer.
4. Igloohome Bolt
Photo: igloohome, igloohome.co
Igloohome Bolt is the only model on this list that generates offline PIN codes that work without WiFi or an internet connection. The algorithm encrypts a time-limited PIN code directly into the lock - a guest receives a code that's valid only during a set period. Perfect for Airbnb rentals: each guest gets a unique PIN for exactly the duration of their stay, with no need to physically hand over a key.
The Igloohome app is focused on property managers - it can generate hundreds of codes for different time periods. Bluetooth for local control, no WiFi requirement.
| Specification | Value |
|---|---|
| Offline PIN | YES - time-limited codes |
| WiFi | NO - Bluetooth only |
| Airbnb | Optimized for short-term rental |
| Codes | Unlimited number of time-based codes |
| Battery | 4x AA, 8-12 months |
| App | Igloohome - property management |
| Price | ~179 EUR |
Pros: Offline PIN - works without internet; ideal for Airbnb and short-term rental; time-limited codes; no cloud dependency for core function; 8-12 months battery life
Cons: No smart home integration (Z-Wave/Zigbee); no fingerprint; industrial-type design; smaller brand recognition; no auto-unlock
Our opinion: Igloohome Bolt is a specific tool for a specific problem. If you rent out a property short-term or have a place with frequent guests, the offline PIN system is far safer than handing out physical keys or relying on cloud-dependent codes. One of the few smart door locks that works completely offline.
5. August Smart Lock Pro
Photo: August, august.com
August Smart Lock Pro has a unique characteristic on this list: it installs only on the interior side of the door and keeps the original key on the outside. Tenants who live in buildings where co-owners or landlords don't permit lock changes - August solves the problem. The original lock remains untouched, the key still works, but from the inside you have smart control.
Z-Wave and Zigbee support for Home Assistant integration. August Connect WiFi Bridge included in the box for remote access. Auto-lock and auto-unlock functions built in.
| Specification | Value |
|---|---|
| Retrofit | YES - no cylinder replacement |
| Original key | Remains active |
| Connection | Z-Wave / Zigbee + WiFi (Bridge) |
| Auto-lock | YES - programmable |
| Bridge | August Connect included |
| Compatibility | Alexa, Google Home, Apple HomeKit |
| Price | ~189 EUR |
Pros: Original key stays - landlords won't notice a thing; Apple HomeKit support; Z-Wave/Zigbee; auto-lock and auto-unlock; no drilling or locksmith
Cons: Design visible on the interior side; no keypad option; smaller August service network in EU; WiFi Bridge requires a stable internet connection
Our opinion: August Smart Lock Pro is the answer for renters who live in apartments and can't change the lock. The retrofit approach is clever - the landlord doesn't know, the tenant has smart control. The only model on the list combining Apple HomeKit with Z-Wave.
6. Nuki Smart Lock 4.0
Photo: Nuki, nuki.io
Nuki Smart Lock 4.0 has the Matter protocol built in - it works with Apple Home, Google Home and Alexa without a separate bridge. WiFi and Bluetooth are directly in the device, which was a common complaint about older Nuki models that needed a separate Bridge hub for remote access.
The auto-unlock algorithm is precise - fewer false triggers than competitors. Nuki is an Austrian company and the best-selling smart lock in the EU. Battery lasts 6+ months on 6x AA cells.
| Specification | Value |
|---|---|
| Connection | Bluetooth 5.1 + WiFi + Matter |
| Matter | YES - compatible with Apple/Google/Amazon |
| Auto-unlock | YES - precise geofencing |
| Bridge | Not needed (WiFi built in) |
| Battery | 6x AA, 6+ months |
| Compatibility | Apple Home, Google Home, Alexa |
| Price | ~199 EUR |
Pros: Matter protocol - future compatibility guaranteed; built-in WiFi without a bridge; most reliable auto-unlock in its class; Nuki ecosystem and accessories; European brand
Cons: 199 EUR - pricier than competitors without a fingerprint reader; Matter implementation still maturing; 6 batteries instead of a rechargeable cell; no keypad
Our opinion: Nuki Smart Lock 4.0 is the premium smart door lock choice for someone building a smart home for the long term. Matter protocol means there won't be compatibility issues when you change smart home platforms. If you want just one lock and refuse to compromise - this is it.
7. Schlage Encode Plus
Photo: Schlage, schlage.com
Schlage Encode Plus has Apple Home Key. That means: hold your iPhone or Apple Watch near the lock and the door opens. No app needed, works offline too. For Apple Watch wearers, that's a flick of the wrist - nothing comes out of your pocket.
WiFi is built in, the keypad comes standard. Schlage is an American lock brand with over 100 years in the industry - the mechanical side is beyond question.
| Specification | Value |
|---|---|
| Apple Home Key | YES - iPhone and Apple Watch |
| Connection | WiFi + Bluetooth |
| Keypad | YES - PIN code as standard |
| Offline access | YES (Apple Home Key) |
| Compatibility | Apple Home, Alexa |
| Warranty | 3 years mechanical |
| Price | ~229 EUR |
Pros: Apple Home Key - fastest access for iOS users; built-in WiFi; keypad as standard; Schlage mechanical reliability; 3-year warranty; works offline
Cons: Apple Home only (no Google Home/Alexa as primary); American standard cylinder - may need adjustment for EU doors; highest price on the list; no fingerprint
Our opinion: Schlage Encode Plus is for iPhone users who want the fastest access without compromise. Apple Home Key is more practical than any app-based control - the iPhone just touches the lock. If you wear an Apple Watch, walking through the door is literally a wrist gesture.
Conclusion
Choosing among smart door locks comes down to three factors: smart home ecosystem, door type and use case.
| User profile | Recommendation | Price |
|---|---|---|
| Budget entry into smart home | Tedee GO | ~129 EUR |
| Home Assistant / Z-Wave ecosystem | Yale Linus Smart Lock | ~149 EUR |
| European brand, Zigbee | Philips 5100 Series | ~159 EUR |
| Airbnb and short-term rental | Igloohome Bolt | ~179 EUR |
| Tenant, no drilling, keeps key | August Smart Lock Pro | ~189 EUR |
| Matter protocol, long-term smart home | Nuki Smart Lock 4.0 | ~199 EUR |
| Apple Home Key, premium | Schlage Encode Plus | ~229 EUR |
For Home Assistant and Z-Wave: Yale Linus Smart Lock (149 EUR) or August Smart Lock Pro (189 EUR). For the Apple ecosystem: Schlage Encode Plus (229 EUR) with Apple Home Key. For Airbnb and short-term rental: Igloohome Bolt (179 EUR) with offline PIN codes. For tenants who can't change the lock: August Smart Lock Pro (189 EUR) - keeps the original key. For long-term smart home with Matter: Nuki Smart Lock 4.0 (199 EUR).
Installation of smart door locks is a DIY job in every case - none of the models on this list requires a locksmith for standard European doors.
Frequently Asked Questions
Can smart door locks be hacked?
All models on the list use AES-128 or AES-256 encryption for Bluetooth and WiFi communication. The risk of hacking is theoretical, but in practice a physical attack on the door is a greater threat than a cyberattack on a smart lock. Nuki and Yale regularly publish security patches. Igloohome Bolt, which works offline, is completely isolated from internet-based attacks.
Nuki or Yale Linus - which to choose in 2026?
Nuki Smart Lock 4.0 (199 EUR) for users who want Matter protocol and the easiest integration without a bridge - the app is better and auto-unlock is more reliable. Yale Linus Smart Lock (149 EUR) for Home Assistant and Z-Wave users who want local control without cloud dependency and a tamper alarm. For a 50 EUR difference - Nuki wins if you don't already have a Z-Wave hub.
Which smart door lock works without internet?
Igloohome Bolt (179 EUR) is designed specifically for offline operation - it generates PIN codes cryptographically without any internet connection. Schlage Encode Plus supports Apple Home Key which works offline via Bluetooth. All locks on the list work normally with a key or PIN code even without an internet connection - smart features require WiFi/Bluetooth, but the door can still be opened.
How long does installation take and is a locksmith required?
Installing Tedee GO, Nuki or August Smart Lock Pro takes 15-20 minutes as a DIY job with a Phillips screwdriver - no drilling, no locksmith. Yale Linus Smart Lock and Philips 5100 require a cylinder swap (EU standard), which is still DIY but slightly more involved. Schlage Encode Plus may require adjustment for European doors. None of the models on this list requires a professional installer for standard doors.
Sources
- Nuki Smart Lock 4.0 - Matter protocol specifications - Matter 1.2 certification and WiFi integration without a bridge
- Yale Linus Smart Lock - Z-Wave certification - Z-Wave Plus and Zigbee compatibility documentation
- Igloohome offline algorithm - security documentation - description of the cryptographic offline PIN algorithm
- Apple Home Key - compatible devices - Apple's official list of Home Key compatible locks