Rivian Buys Third Dimension to Speed Self-Driving and Uber Robotaxis
Rivian acquires U.K. AI startup Third Dimension to turn fleet camera data into 3D simulations for driver assistance and planned Uber robotaxi program.
Summary
Rivian acquired U.K. startup Third Dimension on October 22, 2026, to accelerate advanced driver assistance and the self-driving system for robotaxis it plans to supply to Uber. The undisclosed deal brings its mostly U.K.-based, 15-person staff into Rivian’s autonomy and AI team under James Philbin, while creating an opportunity to expand Rivian’s London AI hub. CEO Tolga Kart and Piotr Sokólski founded Third Dimension in 2024 and raised $7 million from Abstract Ventures, MVP, Soma Capital and Solari Capital. Its AI converts images and video into lifelike 3D environments, initially for game development, though the founders also identified defense and autonomous vehicle applications. The team will now focus exclusively on automated driving.
Third Dimension’s technology could reduce the gap between real roads and simulators traditionally built with game engines and synthetic data. Rivian plans to combine it with aggregated, anonymized camera data from tens of thousands of R1S pickup trucks, R1S SUVs, delivery vans and R2 SUVs whose owners enabled external camera sharing. More than 400,000 driving sequences reach Rivian daily for model training. The resulting simulator is intended to recreate rare, complex conditions without waiting for real-world edge cases, improving training and validation at fleet scale. Rivian has not disclosed the purchase price or a deployment timeline.
Positives
- More than 400,000 daily driving sequences could provide extensive material for training and validating Rivian’s automated-driving models.
- Third Dimension’s AI can reconstruct lifelike 3D environments from images and video, enabling simulation of rare and complex road conditions.
- All 15 employees will join Rivian’s autonomy and AI organization, strengthening James Philbin’s team and potentially expanding the London hub.
- Third Dimension raised $7 million after its 2024 founding, establishing its technology with backing from four venture capital firms.
- Rivian can apply the technology across driver assistance and the self-driving system for robotaxis it plans to supply to Uber.
Risks & concerns
- Rivian disclosed neither the acquisition price nor a timeline for deploying Third Dimension’s technology.
- Traditional simulators retain a quality gap from physical roads despite using synthetic data and increasingly large datasets.
- Rivian’s camera dataset covers only vehicles whose owners have enabled external camera sharing.
- Third Dimension’s 15-person team must adapt technology originally created for game development to safety-critical automated driving.