Reactor Emerges From Stealth With $59M for Real-Time AI Video

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Reactor, a San Francisco software startup building a platform for real-time generative AI video, has raised $59 million in a Series A round. Lightspeed Venture Partners led the financing, with participation from WndrCo, Amplify Partners, Sky9 Capital, and FPV Ventures. The round was dated May 28, 2026.

The company was founded in August 2025 by Alberto Taiuti and Bryce Schmidtchen, both of whom left Apple, where they were technical leads on the Apple Vision Pro. The wider team brings together engineers and researchers from Apple, Netflix, Meta, Google, Adobe, Replicate, and Microsoft, with backgrounds in graphics, real-time systems, interactive media, and scaling AI infrastructure.

Reactor is building the infrastructure layer that makes real-time world models accessible to developers. The goal is to support a new wave of interactive AI applications across media and entertainment, physical AI, and robotics. What sets the company apart is its AI inference engine, which is built to work independently of any single model.

The company plans to use the funding to expand internationally and within the United States to serve large customers, increase its GPU capacity for real-time processing, and invest in marketing. Amazon Web Services is providing compute infrastructure and distribution to handle real-time generative video workloads at global scale. Jeffrey Katzenberg has taken a stake in Reactor through his WndrCo holding company.