# Nuki Smart Lock Ultra (Swiss round profile)

The Swiss round profile Ultra is useful because it narrows Nuki's premium Matter-over-Thread lock to a door type that otherwise needs careful checking. Buy it only when the Swiss hardware fit is confirmed.

Canonical page: https://matterhome.io/devices/nuki-smart-lock-ultra-swiss-round
Markdown page: https://matterhome.io/devices/nuki-smart-lock-ultra-swiss-round.md
Author: Matterhome Editorial Team
Author profile: https://matterhome.io/authors/matterhome-editorial-team
Edited and fact-checked by: JC Martinez
Editor profile: https://matterhome.io/authors/jc-martinez

## Device Facts

- Brand: Nuki
- Model: Smart Lock Ultra (Swiss round profile)
- Product type: Matter-over-Thread Retrofit Smart Lock
- Category: Locks
- Connection: Matter over Thread
- Matter status: Nuki lists a Swiss round profile variant of Smart Lock Ultra, with the same Matter-over-Thread smart lock platform used by the Ultra family.
- Launch date: 2026-01
- Thread border router required: Yes
- Brand hub required: No
- Typical price range: €349
- Markets: Europe
- Review status: Compatibility guide
- Product image: https://matterhome.io/content-assets/devices/nuki-smart-lock-ultra-swiss-round/product.webp
- Product image alt text: Nuki Smart Lock Ultra Swiss round profile cylinder variant
- Product image source: https://media.crystallize.com/nuki-production/26/1/12/a1953f76/nuki-ultra-cylinder_ch.png

## Ecosystem Support

- Apple Home: Supported
- Google Home: Supported
- Alexa: Supported
- SmartThings: Supported
- Home Assistant: Supported

## Best For

- Swiss round profile doors that fit Nuki's Ultra path
- Buyers who want the Ultra design rather than a bulkier retrofit lock
- Matter homes with Thread already stable at the entrance

## Skip If

- Your door uses Euro profile, Nordic, or North American deadbolt hardware
- You want a lock that installs without a careful cylinder check
- You need complete lock administration inside one Matter app

## Setup Notes

- Confirm that the door uses compatible Swiss round profile hardware before ordering.
- Complete Nuki app installation and calibration before Matter pairing.
- Use a Thread-capable Matter controller for ecosystem control.

## Known Limitations

- This variant is for Swiss round profile door hardware, not Euro profile, Nordic, or North American deadbolt doors.
- Nuki app features and accessory permissions may remain separate from Matter ecosystem controls.
- Platform support for lock users, logs, and codes can vary.

## Pros

- Brings Nuki Smart Lock Ultra to Swiss round profile doors
- Native Matter-over-Thread control without a Nuki bridge
- Same small Ultra lock body as the Euro profile model
- Works with Nuki's keypad and NFC accessory path

## Cons

- Door and cylinder fit are narrower than the general Euro profile model
- Requires Thread border router coverage at the door
- Matter apps may not expose every Nuki access-management detail

## Sources

- https://nuki.io/en/products/smart-lock-ultra
- https://nuki.io/en/products/product-details/smart-lock-ultra-technical-details
- https://nuki.io/en/company/news/nuki-now-supports-matter
- https://media.crystallize.com/nuki-production/26/1/12/a1953f76/nuki-ultra-cylinder_ch.png

## A narrower Ultra variant

This is still Nuki Smart Lock Ultra, but the buyer problem is different from the Euro profile model. The Swiss round profile version exists for a specific door hardware path, so compatibility should be boring before price, Matter support, or accessory bundles enter the discussion.

If the door is right, the payoff is the same Nuki Ultra platform: a compact interior retrofit lock, Matter over Thread for ecosystem control, and Nuki's app for setup and deeper lock management.

## What Matter changes and what it does not

The lock can join Apple Home, Google Home, Alexa, SmartThings, or Home Assistant through Matter over Thread. That removes the need for a Nuki bridge for the Matter path, but it does not turn every Nuki access feature into a portable Matter feature.

Plan on using the Nuki app for installation, calibration, firmware, remote access choices, and accessory pairing. Use your Matter ecosystem for the shared lock-control layer.

## Check the cylinder before comparing prices

The wrong lock shape turns a good Matter product into a return. Confirm Swiss round profile compatibility, make sure a Thread border router reaches the entry, and then compare this against the more general Euro profile Ultra or the less expensive Pro and Go models.