Kinexa AI

The intelligence in every joint.

Kinexa AI designs smart, high-torque-density actuator modules — the muscles of humanoid and mobile robots. Designed in San Francisco. Every joint ships with JointOS.

  • Stanford
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Actuators with a brain.

A humanoid needs dozens of joints. Most of them are dumb parts in an AI-first stack, sourced through a supply chain US teams don't control. Kinexa modules ship identified — friction, backlash, and heat included — so robot-learning teams stop losing months to the sim-to-real gap.

  • KX-R

    Rotary modules

    Quasi-direct-drive actuators for humanoid and mobile robots: high-torque BLDC, low-ratio planetary, integrated driver, dual encoders.

  • KX-L

    Linear modules

    Planetary roller-screw actuators for legs and hips, where precision manufacturing is the moat. Next in the line.

  • JointOS

    Firmware plus cloud

    Firmware on the joint MCU: torque and thermal sensing, auto-calibration, fleet health, and exportable dynamics models for MuJoCo and Isaac Sim.

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Talk to us about a joint.

We're meeting design partners, robot OEMs, and investors. Tell us what you're building and we'll set up a call.

Reply time
Within one business day
Based in
San Francisco, California

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