YC Summer 2026 (S26) founder

James Stevens

Founder of Enact, Real-world RL environments for robotics models

Company

James Stevens is listed as a founder of Enact. Enact creates the physical environments to benchmark and hill climb robotics models on high-value tasks. We find where robots fail, and fix them with our in-house training loop.

Founder traction evidence

Public posts and activity attributed directly to this founder.

  1. X

    Today we’re launching Enact: post-training infrastructure that makes robotics models work in the real world.

    Today we’re launching Enact: post-training infrastructure that makes robotics models work in the real world. Robotics models fail when execution reaches states their training data never covered. A slip, an off-angle grasp, or an external disturbance can leave the policy without

  2. X

    We’ve started moving onto longer-horizon tasks.

    We’ve started moving onto longer-horizon tasks. Table bussing - π0.5 completed 48/50 rollouts on a consistent setup. Very much in distribution, but a useful baseline.

  3. X

    Can't wait to drip out my humanoid with custom hypebeast parts

    Can't wait to drip out my humanoid with custom hypebeast parts

  4. X

    I’ll be at Actuate next week.

    I’ll be at Actuate next week. If you’re working on robot evals, recovery data, or deployment robustness, let’s grab coffee. DM me!

  5. X

    should we start a war with Belgium?

    should we start a war with Belgium?

  6. X

    I guess I’m from the Gulf of America now

    I guess I’m from the Gulf of America now

  7. X

    @elonmusk sponsor our next event?

    @elonmusk sponsor our next event?