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One Robot: World models for robot evals and training.
One Robot is a Y Combinator-backed company that world models for robot evals and training. The company participated in the Winter 2026 batch of Y Combinator.
One Robot builds simulation environments that are realistic to see and realistic to interact with, so robotics teams can train and evaluate robot policies without being bottlenecked by robot time.
Today, improving a VLA often means more real-world hours: setting up the scene, running trials, resetting, and repeating. This loop is slow, expensive, and hard to scale.
One Robot was part of Y Combinator's Winter 2026 cohort, has a team of approximately 2 employees, and is actively operating.