The body is a robotics dev kit that can run openpilot, open source software with over a million hours of usage in the field.
We believe that in order to solve AI, you must be embedded in the real world.
The body is human scale, and has a human usable development environment.
Sensorium streaming
Precise motor control
Runs Ubuntu 20.04
Open source software
Technical Specs
6.5" L x 1' 3.5" W x 4' 8" H
(16.5cm x 39.5cm x 142.3cm)
18lbs / 8.16kg
maximum speed
1 m/s
2 x 150W
battery capacity
100Wh (Li-ion)
nominal battery voltage
typical runtime (joystick control)
~2 hours
standby time (balancing)
~6-7 hours
29.4V 2A
time to charge
~2 hours

Can be charged while powered on and balancing.
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comma body

the future of people
or $91/mo with Affirm. Prequalify now
Free US Shipping
Free US shipping, No international shipping at this time. Ships in 1-3 months; first in, first out.
comma 3X sold separately.


What is the comma body?

comma body is “the future of people.” You buy a comma body, buy a comma 3X (the head), attach the comma 3X to the body, and watch it come to life.

We believe that in order to solve AI, for most peoples’ definition, you must be embedded in the real world. We define AI as a machine that can do every task at least as well as a human. And in order to do human tasks, it helps a lot to have a human-like body. The comma body is the beginning of that journey.

Today, it’s a mobile platform for the comma 3X, but we will be building a knee and arms for it. Like everything we do, we try to distill the problem down to its essence, so unlike some companies, we aren’t focused on the humanoid shape. Wheels are a fine form of locomotion for cooking and cleaning, the dream tasks of the comma body. Two arms, a knee, and a comma 3X should complete a comma person (sold separately, knee and arm coming in 2022/2023).

What software does it run?

The comma body runs openpilot! From openpilot’s perspective, the comma body is a car. It runs the same camera and logging software, so we’ll be able to learn from the fleet of bodies in the same way we learn from our fleet of cars.

At launch, the software will balance the body (using the same localizer as the car!) and allow you to drive it around via web interface. Shortly we’ll add video streaming to that web interface, allowing you to drive your body outside line of sight. We’d also like to add a VR app to drive the body from a first person view, this will be needed by the time we ship the arms.

Once we start getting data back from our body fleet, we can train models. The first model we will train (jointly with the driving model!) is a posenet, allowing inside out position tracking. When this model is shipped, the localizer will change from 3-DoF to 6-DoF. And once the dead reckoning is similar quality to what we have on the cars, adding a SLAM system will be very simple to allow drift free localization in your environment.

Read more: Launching the comma body

We recommend purchasing a comma 3X from the comma Shop to operate the body.

comma body software: GitHub
comma body shouldn’t go anywhere you couldn’t go on a hoverboard, so no stairs, etc.

In The Box

  • comma body kit (base, rails, and hardware)
  • 1 29.4V 2A charger
  • 1 mount [compatible with the comma 3X (not included)]
  • 1 USB-C 6.6ft 90 deg cable
  • 1 set of wheels
  • 1 helmet

Tech Specs

  • Dimensions: 6.5" L x 1' 3.5" W x 4' 8" H (16.5cm x 39.5cm x 142.3cm)
  • Weight: Device: 18 lbs (8 kg), Charger: 1 lb (0.5 kg)
  • Motors: 2 x 150W
  • Battery charge time: Device charges in approximately 2 hours when powered off using the included charger. Can be charged while powered on and balancing.
  • Battery type: Lithium-Ion rechargeable battery, 25.2V 100Wh
  • Height when assembled: 4' 8”(142.24cm)

Fine Print

30-Day Return
If for any reason you are dissatisfied with anything purchased at the shop, ship it back within 30 days for a full refund.

Free US shipping; we ship with UPS and signature confirmation. This item cannot be shipped internationally, but hopefully this will change in the near future. We do not currently offer expedited shipping. – Orders are typically fulfilled during the week of purchase.

1-year limited warranty against hardware defects.

comma body
Assembly Instructions
8 steps
40 min

Join the conversation

Have a question or want to learn more? There are thousands of knowledgeable community members on the Discord.


Developer Resources

Check out the code behind the the comma 3X and openpilot. Review, fork, and contribute to the open source ecosystem.