Reactor raises $59M for real-time AI world infrastructure

Reactor is a funding story with a real product thesis: generative video is moving from static clips toward interactive worlds that respond in real time. The startup emerged from stealth with $59M led by Lightspeed Venture Partners, with WndrCo, Amplify Partners, Sky9 Capital, FPV Ventures, and others participating. Reactor says its SDK and API let developers build real-time interactive applications without managing the inference, latency, and scaling complexity themselves. The founding team includes former Apple Vision Pro technical leads Alberto Taiuti and Bryce Schmidtchen, and the company says it is already working with media, entertainment, physical AI, and robotics partners. AWS is its preferred cloud provider. Watch whether world models mature fast enough for Reactor to become an infrastructure layer instead of a niche demo platform.

Key details: Reactor, $59M, May 29, 2026, Lightspeed Venture Partners, WndrCo, Amplify Partners, Sky9 Capital, FPV Ventures.

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