Synheart's infrastructure is live on device inference is free, forever
Synheart's infrastructure is live on device inference is free, forever
Synheart builds Human State Interface infrastructure an on device, real-time read on focus, stress, and recovery that any app or AI can build on. Open standard. Private by architecture.
Devices track actions only.
Runs on device
Compatible with any device, wearable or not
AI RESEARCH COMPANY
What You Can Build
Here's what teams are building on Synheart today, from consumer wellness apps to infrastructure integrated directly into other companies' products.
Track focus, stress, and recovery daily, keeping data on their device.
Provide context on stress and mental load for better responses.
Identify focus levels and design the app accordingly.
See how a product actually affects the people using it, measured directly on their device.
Create products that detect when users are disengaged and adapt accordingly.
Give researchers a real-time, structured way to study attention and stress.
Signal Sources
There are two kinds of signals that Synheart's HSI infrastructure can process.
Physiological signals from any device reading the body watch, ring, patch are standardized by Synheart into a consistent stream.
Behavioral signals from digital devices: typing rhythm, scrolling pace, and patterns. All content remains private, focusing on interactions, not actions.
WHOOP
WATCH
FITBIT
PixelCompatible with wearable and wellness devices, and the digital devices people already use.
How It Works, Simply
Synheart handles the signal processing, the on-device computing with locally inferred models, and the output. You integrate once.
Where your team manages what you've built: keys, usage, subscriptions, and more, from a detailed developer dashboard that shows your app's data in one place.
Explore Platform
The one thing you actually integrate. Connects to signals, runs locally inferred models on the device, and gives you a clear read.
Explore Core SDK
In Practice
There are two kinds of signals that Synheart's HSI infrastructure can process.
A signal
Where your team manages what you've built: keys, usage, subscriptions, and more, from a detailed developer dashboard that shows your app's data in one place.
74
Focus
31
Stress
62
Recovery
These are estimates intended for software to build with. When signal confidence is low, Synheart reports that directly.
For Builders
Integrate Core SDK, pick a signal source, and read structured output immediately.
Privacy, Built In
This is how the whole system is built.
Backed by
Mila
Quebec AI Institute Montreal, Canada
Synheart is part of Mila Ventures, the startup program of Mila – Quebec AI Institute. Our founder worked in Yoshua Bengio's lab at Mila before starting Synheart.
NVIDIA
Accelerating human centric AI
Synheart models are small enough to run on the hardware people already wear. Cognitive load is read in under 5 ms on a wearable, with nothing sent to the cloud.
Academic Partners
Collaborative research for real world impact
We run studies with universities and labs, always with consented participants and ethics oversight, so our models are tested on real people in real settings.
Open Science
A more open and human centered future
Our papers are public, our SDKs are open source, and our datasets are free on Hugging Face, so anyone can check our work, replicate it, and build on it.
Privacy, Built In
And What's Built On It
Human state, read on-device and built into products people use.
THE AGE OF AGENTS
Agents now write, schedule, decide, and interrupt on people's behalf — and every one of those actions is timed blind. Timing is a human-state problem. That's the layer Synheart builds. For engineering teams, Synapse brings it to the AI tools you already run.
How It Works, Simply
Give a product a real, live read on how someone is doing: focus, stress, and recovery, all on their own device.
Start free
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