# Level Home Level Bolt

*Level Home / C-D21U*

> The Level Bolt is a retrofit that makes an existing deadbolt smart and keeps its keys, with Matter over Thread built in. Remote use needs a Matter-over-Thread hub controller. It suits HomeKit, Google Home, Alexa, SmartThings and Home Assistant users, with native support through Matter over Thread.

- Canonical page: https://smarthomecanon.com/devices/level-bolt-matter
- Last checked: 2026-10-20

## Key facts

| Fact | Value |
| --- | --- |
| Brand | [Level Home](https://smarthomecanon.com/brands/level) |
| Category | Lock |
| Model numbers | C-D21U |
| Status | Current[^1][^2] |
| Matter device type | withheld |
| Form | Retrofit for an existing deadbolt[^3] |
| Matter over Thread | Matter over Thread built in[^3] |
| HomeKit and Home Key | Works with HomeKit; Home Key not stated by Level[^2] |
| Remote access needs | Matter-over-Thread hub controller[^3] |
| Unlock methods | Level Home app, physical key; optional Keypad[^3] |
| Power | 1 CR2 battery included[^3] |
| Released | unknown |

## Integration paths

**How the Level Home Level Bolt connects**

| Path | Requires | Local | Features lost |
| --- | --- | --- | --- |
| [Matter / Thread](https://smarthomecanon.com/protocols/matter-thread) | Thread border router, Matter controller[^3] | unknown | unknown |
| [BLE](https://smarthomecanon.com/protocols/ble) | BLE proxy or phone[^3] | unknown | unknown |
| [Wi-Fi cloud](https://smarthomecanon.com/protocols/wifi-cloud) | Vendor bridge[^3] | unknown | unknown |

**Platform support for the Level Home Level Bolt**

| Path | Platform | Support | Integration |
| --- | --- | --- | --- |
| Matter / Thread | [HomeKit](https://smarthomecanon.com/platforms/homekit) | Native[^2] |  |
| Matter / Thread | [Google Home](https://smarthomecanon.com/platforms/google-home) | Native[^2] |  |
| Matter / Thread | [Amazon Alexa](https://smarthomecanon.com/platforms/alexa) | Native[^2] |  |
| Matter / Thread | [Samsung SmartThings](https://smarthomecanon.com/platforms/smartthings) | Native[^2] |  |
| Matter / Thread | [Home Assistant](https://smarthomecanon.com/platforms/home-assistant) | withheld |  |
| Wi-Fi cloud | [Google Home](https://smarthomecanon.com/platforms/google-home) | Native[^4] |  |
| Wi-Fi cloud | [Amazon Alexa](https://smarthomecanon.com/platforms/alexa) | Native[^4] |  |

## Related pages

- [Level smart locks](https://smarthomecanon.com/lines/level-smart-locks) (line)
- [Level Home](https://smarthomecanon.com/brands/level) (brand)
- [Matter over Thread](https://smarthomecanon.com/protocols/matter-thread) (protocol)
- [Bluetooth Low Energy](https://smarthomecanon.com/protocols/ble) (protocol)
- [Wi-Fi through a cloud service](https://smarthomecanon.com/protocols/wifi-cloud) (protocol)
- [HomeKit](https://smarthomecanon.com/platforms/homekit) (platform)
- [Google Home](https://smarthomecanon.com/platforms/google-home) (platform)
- [Amazon Alexa](https://smarthomecanon.com/platforms/alexa) (platform)
- [Samsung SmartThings](https://smarthomecanon.com/platforms/smartthings) (platform)
- [Home Assistant](https://smarthomecanon.com/platforms/home-assistant) (platform)

## Sources

[^1]: Level Bolt (Matter) - Level shop. https://level.co/products/level-bolt/matter/ (manufacturer, checked 2026-10-17)
[^2]: All products - Level shop. https://level.co/all-products/ (manufacturer, checked 2026-10-17)
[^3]: Level Bolt - Level. https://level.co/level-bolt/ (manufacturer, checked 2026-10-17)
[^4]: Level Connect Wi-Fi Bridge - Level shop. https://level.co/products/connect-wifi-bridge/ (manufacturer, checked 2026-10-17)