Private by design
Models, prompts and answers never touch a server. There is no account, no telemetry and no way to look in — because there is nothing to look at.
Introducing Hearth
Intelligence that
stays home.
Hearth is a small, quiet box that runs large AI models on your own hardware. Ask questions, automate your home, search your files — and nothing ever leaves the house.
- 100% on-device inference
- Whisper-quiet at 19 dB
- Wi-Fi 7 & Thread built in
As seen in
The Localist
Home Signal
Quiet Tech
The Domestic Review
North of Home
Why Hearth
Everything local. Nothing watched.
Your conversations, files and habits are the most personal data you own. Hearth keeps all of it where it belongs — in your home.
Fast where it matters
The Ember H1 chip sustains 45 TOPS, so a 27-billion-parameter model answers in well under a second — no spinner, no queue, no cloud round-trip.
Whole-home reach
Wi-Fi 7, Thread and Matter built in. Talk to it from the kitchen, the office or the garden — it bridges to the devices you already own.
Works offline
Internet goes, Hearth doesn't. Every model runs on the box itself, so the assistant, the summaries and the automations keep working through any outage.
Whisper-quiet
A passive-friendly thermal design idles at 19 decibels — quieter than a library. You will notice it only when you want to.
Updates that respect you
Model updates download and verify on the box. Your data is never used for training, and you can pin any model version you like.
Hearth
Cloud assistants
Your conversations
Stay on the box
Stored by the provider
When the internet drops
Keeps working
Goes silent
Voice response
Under 300 ms
600 ms to 2 s
Monthly cost
$0, after purchase
$8–20 per month
Who can look in
You
The provider
How it works
From box to home in ten minutes.
-
01
Plug it in
Power, Wi-Fi, done. The Hearth app finds the box and walks you through setup — no account required.
-
02
Pair your home
Lamps, locks, speakers and sensors join over Thread and Matter. They stay on your network, controlled locally.
-
03
Talk to it
Ask questions, run routines, search your own files. Every word is processed on the box and then forgotten.
Under the hood
Boring hardware, remarkable results.
No fans screaming, no blinking light show. Just a dense little computer that does one job exceptionally well.
- Chip
- Ember H1 — 45 TOPS NPU, 8-core CPU
- Memory
- 32 GB unified LPDDR5x
- Models
- 7B to 27B parameters, 128K context
- Audio
- 4-mic far-field array, dual 40 mm drivers
- Connectivity
- Wi-Fi 7, Thread, 2 × USB-C, 2.5 GbE
- Power
- 45 W adapter, 11 W at idle
- Footprint
- 120 × 120 × 38 mm, 640 g
- Noise
- 19 dB(A) idle, 24 dB(A) sustained load
Pricing
One box. Three sizes.
Every Hearth includes the assistant, the app and lifetime model updates. No subscription, ever.
Hearth Mini
For a desk, a bedroom, a first try
$349one-time
- 7B and 13B models
- 16 GB unified memory
- Assistant + file search
- Wi-Fi 7 & Thread
Most popular
Hearth
For the whole home
$649one-time
- 7B to 27B models
- 32 GB unified memory
- Assistant, search & automations
- Matter & home control
- Dual speakers, 19 dB idle
Hearth Pro
For heavy users and small studios
$1,199one-time
- 27B models at full precision
- 64 GB unified memory
- 256K context window
- Second unit for mesh audio
- 2.5 GbE + 4 × USB-C
Early testers
Quiet. Fast. Worth it.
The internet went down for six hours last week. Hearth didn't notice. Neither did my family.
It summarized a month of meeting notes in ninety seconds, on my own network. I stopped being afraid of my smart home.
Six months in, the only thing I notice is the silence. It is the first gadget I forget is there.
Questions
Asked, honestly answered.
No. Inference, memory and storage all live on the box. The only network traffic Hearth ever makes is for model updates, and those are signed, verified and optional — you can set the box to fully offline and everything keeps working.
Out of the box, Hearth ships with a tuned 27B model for conversation, a 7B model for fast tasks, and a vision model for photos. Any open model that fits in memory can be added from the app — the box handles quantization automatically.
Nothing, as far as you can tell. The assistant, file search, summaries and home automations all run locally. Cloud-only conveniences like web search pause until you reconnect — the box tells you plainly when that happens.
Hearth idles at 19 decibels, which is below the noise floor of most rooms, and draws 11 W at rest. Under sustained heavy load it rises to 24 dB and 45 W — you will feel a gentle warmth on the top, never a fan.
Through Matter and Thread, both built in. Lamps, thermostats, locks and sensors pair from the app and are controlled locally — so "lights off" still works at 2 a.m. with no cloud in the loop. Plain Wi-Fi devices work too.
The full price is the box. The companion app, the assistant, model updates and a two-year hardware warranty are all included, with no monthly fee. When a better model comes out, you download it — that is the whole business model.
Pre-orders open
Ready to bring intelligence home?
The first 1,000 boxes ship in December, with a 60-day no-questions refund window. If Hearth is not quieter and faster than your cloud assistant, send it back.