Home Assistant Voice

Home Assistant Voice

Launch Year: 2024

Model: NC-VK-9727

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Our review

Home Assistant Voice Review: A Voice Assistant That Can Run Entirely on Your Own Network

Local speech to text, local conversation and local text to speech, with a mute switch that physically cuts power to the microphone.

The verdict

Home Assistant Voice is the answer for people who want voice control without sending their speech to a company's servers. Speech to text, the conversation agent and text to speech can all run locally against your own Home Assistant instance, with cloud versions of each available through a subscription if you want more capable processing. The privacy hardware is real rather than decorative: the mute switch physically cuts power to the microphone. It only works with Home Assistant, has no screen or camera, and connects over 2.4 GHz Wi-Fi.

Best for
  • Home Assistant users
  • Privacy-focused homes
  • Local-only voice control
  • Tinkerers and self-hosters

Pros

  • Speech to text, conversation and text to speech can all run locally
  • Cloud versions available per stage with a subscription, if local is not enough
  • Mute switch physically cuts power to the microphone
  • No camera at all
  • Programmable buttons plus volume and play/pause controls
  • Line out for connecting a better speaker
  • Small and light at 84 x 84 x 21 mm and 96 g
  • Low price

Cons

  • Home Assistant only: no Alexa, Google Home, HomeKit or SmartThings
  • Not a hub: no Zigbee, Thread border router or Matter bridge
  • No screen and no display of any kind
  • No voice match, so it cannot tell family members apart
  • No temperature, humidity, motion or ambient light sensing
  • 2.4 GHz Wi-Fi only, with no Ethernet and no 5 GHz
  • Line out only, with no line in
  • Warranty terms are not documented

Who is Home Assistant Voice for?

It is for people already running Home Assistant who want to talk to it. Mainstream smart speakers are the front end of a cloud service; this one is the front end of your own server, which changes both the privacy story and what the assistant can do, since it addresses your entities and automations directly rather than a vendor's device list. It is a small unit, 84 mm square and 96 g, designed to sit on a shelf or a desk in the room you want to control.

How the local voice stack works

All three parts of the voice pipeline exist in local form: speech to text turns your words into text on your own hardware, the conversation agent interprets the request, and text to speech generates the spoken reply. Nothing has to leave the house. Cloud versions of each stage are available with a subscription, which is the route to take when local models are not accurate enough or your server is not powerful enough, and the choice is yours per stage rather than all or nothing. On the device there are volume and play/pause controls plus programmable buttons, so common actions can be triggered without speaking at all, and a line out lets it feed an external speaker for better audio.

Privacy hardware

The mute switch is the detail that separates this from other assistants: it physically cuts power to the microphone rather than asking the software to ignore it. For an always-listening device in a bedroom or a home office, that is the difference between trusting a setting and trusting a circuit. There is also no camera at all, and no ambient light or motion sensing, so the device has no way to observe the room beyond hearing it.

What to know before you buy

Home Assistant is the only supported platform, by design: there is no Alexa, no Google Home, no Apple HomeKit and no SmartThings, so this is not a device to buy before you have a Home Assistant server running. It is not a hub either, with no Zigbee coordinator, no Thread border router and no Matter bridge. There is no screen, no camera, no built-in temperature or humidity sensing, and no voice match, so it will not tell family members apart. Wi-Fi is 2.4 GHz only, with no Ethernet port and no 5 GHz, and audio output is line out only rather than line in. Warranty terms are not documented.

Is Home Assistant Voice worth it?

It is cheap for a voice assistant, and cheaper still measured against what it replaces, which is a cloud service with an ongoing relationship to your speech. If you run Home Assistant and want voice control that keeps working when the internet is down and does not phone home, it is the most direct route there. If you do not run Home Assistant, there is nothing here for you, and if you want music playback and a polished assistant experience, a mainstream smart speaker will feel more finished.

Frequently asked questions

Does Home Assistant Voice work without the internet?

Yes, if you use the local pipeline. Speech to text, the conversation agent and text to speech all have local options that run against your own Home Assistant instance. Cloud versions of each are available with a subscription.

Does it work with Alexa or Google Home?

No. Home Assistant is the only supported platform.

How does the microphone mute work?

The mute switch physically cuts power to the microphone, rather than relying on software to stop listening.

Can it act as a Zigbee, Thread or Matter hub?

No. It is a voice device only, with no Zigbee coordinator, Thread border router or Matter bridge functionality.

Can I connect it to better speakers?

Yes. It has a line out, so it can feed an external speaker. There is no line in.

At a glance

Summary

Everything this voice assistant supports, grouped by category.

Size & Materials
3.3 × 3.3 × 0.8 in (84 × 84 × 21 mm)3.4 oz (96 g)
Connectivity
2.4 GHz WiFiBluetooth
Integrations
Home Assistant
Speech to Text
LocalCloud (Subscription Required)
Conversation agent
LocalCloud (Subscription Required)
Text to Speech
LocalCloud (Subscription Required)
Features
3.5mm line in/out (Line Out Only)Physical Volume ControlsPhysical Play/Pause ControlsMic Off SwitchProgrammable Buttons

Price History

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Company
Nabu Casa logo

Nabu Casa

4.6/ 5 avg ratingUSA flagHeadquartered in USA

Nabu Casa is the company founded by the creator of Home Assistant, the popular open-source home automation platform. It funds Home Assistant development and offers Home Assistant Cloud for easy remote access and voice assistant integration, plus hardware like Home Assistant Green and the Voice Preview Edition. Nabu Casa is central to the privacy-focused, locally controlled smart home community.

Full specifications

Every spec, organized

Browse the full breakdown by category. Tap the on any row for what it means, or the for sources and documentation.

Size & Materials
Dimensions

3.3 × 3.3 × 0.8 in (84 × 84 × 21 mm)

Weight

3.4 oz (96 g)

Available in colors

NO

Connectivity
2.4 GHz WiFi

YES

5 GHz WiFi

NO

Bluetooth

YES

Ethernet

NO

Integrations
Google Home

NO

Alexa

NO

Apple HomeKit

NO

Samsung SmartThings

NO

Home Assistant

YES

Hub
Zigbee Coordinator

NO

Thread Border Router

NO

Matter Bridge

NO

Speech to Text

When you are controlling your assistant with voice, the speech-to-text engine turns your voice command into text.

Local

YES

Cloud

Subscription Required

Conversation agent

The conversation agent is the brains of your assistant and will process the incoming text commands.

Local

YES

Cloud

Subscription Required

Text to Speech

When you are controlling your assistant with voice, the text-to-speech engine turns the conversation text responses into audio.

Local

YES

Cloud

Subscription Required

Display
Screen

NO

Screen Type

-

Color Screen

-

Touch Screen

-

Screen Size

-

Screen Resolution

-

Video
Camera

NO

Field of View

-

Camera Off Switch

-

Sensors
Motion

NO

Temperature

NO

Humidity

NO

Ambient Light

NO

Alerts
Glass breaking

NO

Smoke/CO alarm

NO

Features
3.5mm line in/out

Line Out Only

Physical Volume Controls

YES

Physical Play/Pause Controls

YES

Mic Off Switch

YES

Mute switch that physically cuts power to the microphone

Wall Mount

NO

Voice Match

NO

Programmable Buttons

YES

Head to head

Home Assistant Voice vs the competition

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Nabu Casa

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