Ambient Comfort Intelligence — Now in Beta

Comfort, automated.

COSI reads your body, learns your preferences, and silently adjusts your environment — temperature, light, airflow — before you feel uncomfortable.

Join the waitlist See how it works
Comfort Score · Live
82
↑ Rising · Awake context
HRV 58ms
20.4°C
62% RH
310 lux
Cooling room to 19.5°C for sleep prep
How it works

One loop.
Endless comfort.

COSI closes the gap between how you feel and how your environment responds — automatically.

01
Sense your body
COSI reads physiological signals from your Apple Watch, Fitbit, Oura Ring, or COSI Band — HRV, skin temperature, motion, and stress patterns.
02
Read your environment
Connected to your Nest thermostat, Govee lights, smart plugs, and sensors — COSI knows exactly what your room feels like right now.
03
Compute your score
A real-time Comfort Score (0–100) fuses your body data and environment into a single signal. The engine learns your personal baselines over time.
04
Adjust invisibly
COSI acts before you notice discomfort. Temperature drifts, lights shift, airflow adjusts. No notifications. No dashboards. Just comfort.
⌚
Apple Watch
HRV 58ms · Skin temp 36.1°C
↓
🧠
COSI Cloud
Comfort Score: 82 · Rising
↓
🌡️
Google Nest
Cooling to 19.5°C
↓
💡
Govee Lights
Dimming to 15% warm white
Works with

Your devices,
finally connected.

COSI works with the smart home devices you already own. No new hardware required to get started.

⌚Apple Watch
💍Oura Ring
⌚Fitbit
⌚Garmin
🌡️Google Nest
🌡️Ecobee
💡Govee
💡Philips Hue
💡LIFX
🔌TP-Link Kasa
🔊Amazon Alexa
🏠Google Home
📡COSI Band COMING SOON
🔌COSI Smart Plug COMING SOON
Features

Built for people
who feel everything.

📊
Real-time Comfort Score
A live 0–100 score that fuses your physiological state with your environment. Updates every few seconds.
🧠
Personal learning engine
COSI learns your baselines over days and weeks. Your comfort profile becomes uniquely yours — impossible to replicate.
🌙
Sleep intelligence
Tracks sleep stages, micro-awakenings, and restlessness. Automatically optimizes temperature through every phase of your night.
🏠
Multi-room zones
COSI Nodes bring comfort intelligence to every room. Bedroom, office, living room — each optimized independently.
💬
COSI AI
Ask anything about your comfort data. "Why was my score low last night?" gets you a real answer grounded in your actual data.
👥
Shared comfort
Two people, one room. COSI averages comfort scores and finds the environment that works best for both of you.
Pricing

Start free.
Automate everything.

No hardware required to get started. Connect your existing devices and experience comfort intelligence today.

Free
$0
forever
  • Real-time Comfort Score
  • 1 climate device
  • 1 lighting device
  • 1 wearable
  • Unlimited COSI hardware
  • Basic schedule automation
  • 7-day history
  • COSI AI (basic)
  • Real-time automation
  • Comfort pattern learning
  • Multi-room zones
Get started free
Most popular
Pro
$9.99
per month · 7-day free trial
  • Everything in Free
  • Unlimited devices
  • Real-time AI automation
  • Comfort pattern learning
  • Custom schedules
  • Multi-room zone control
  • Advanced sleep intelligence
  • 90-day history + trends
  • Proactive COSI AI
  • Shared environment mode
  • Guest + Vacation mode
Start free trial
2 months free
Pro Yearly
$99
per year · save $21
  • Everything in Free
  • Unlimited devices
  • Real-time AI automation
  • Comfort pattern learning
  • Custom schedules
  • Multi-room zone control
  • Advanced sleep intelligence
  • 90-day history + trends
  • Proactive COSI AI
  • Shared environment mode
  • Guest + Vacation mode
Get started
Hardware

Built for comfort.
From the ground up.

Optional COSI hardware unlocks the full comfort loop — deeper biometrics, faster response, zero friction.

COSI Band
$179
Wrist sensor · EDA + temp + motion
  • ✓Continuous EDA stress tracking
  • ✓Skin temperature sensor
  • ✓Motion + activity tracking
  • ✓7-day battery · waterproof 50m
  • ✓Wireless charging
Pre-order Band →
COSI Hub
$99
Room sensor · environmental intelligence
  • ✓Temperature + humidity + CO₂
  • ✓Light + noise level sensing
  • ✓Smart plug control built-in
  • ✓Works with Nest, Govee, Hue
  • ✓Always-on, plug-in device
Pre-order Hub →
Best value
Starter Kit
$299 $337
Save $38 · Band + Hub + Smart Plug
  • ✓Everything in Band + Hub
  • ✓COSI Smart Plug included
  • ✓Full comfort loop out of the box
  • ✓Priority shipping
  • ✓1 month COSI Pro free
Pre-order Starter Kit →
COSI Band Lite
$109
Entry wrist sensor · temp + motion
  • ✓ Skin temperature sensor
  • ✓ Motion + activity tracking
  • ✓ 5-day battery · splash resistant
  • ✓ USB-C charging
  • — No EDA stress sensor
Pre-order Band Lite →
Most advanced
COSI Band Pro
$249
Full biometric suite · clinical grade
  • ✓ Everything in Band
  • ✓ Optical heart rate + HRV (PPG)
  • ✓ SpO2 blood oxygen sensor
  • ✓ Haptic comfort alerts
  • ✓ Always-on Comfort Score display
  • ✓ 10-day battery · waterproof 100m
  • ✓ Sapphire glass · stainless steel
Pre-order Band Pro →
Founder Edition Limited — 50 units

Band + Hub + Smart Plug + Lifetime Pro — pay once, never again. Only available to our first 50 customers.

✓ All hardware included ✓ Lifetime Pro subscription ✓ Priority support forever ✓ All future features included
$499 $745+
one-time · no subscription ever Claim Founder Edition →
Get early access

The app is almost ready.
Get in early.

COSI app early access is opening soon. Sign up and we'll send you a link the moment it's live — plus founder pricing on Pro.

📱 Early app access
💰 Founder pricing on Pro
🔔 Hardware launch updates
🧪 Beta feature testing

No spam. Unsubscribe anytime. Free to join.

500+
People waiting
iOS + Android
App platforms
$0
To get started