Reactor, a developer platform for real-time generative video, emerged from stealth with $59 million in funding led by Lightspeed Venture Partners, with participation from WndrCo, Amplify Partners, Sky9 Capital, FPV Ventures, and additional investors.
The company is building an infrastructure layer designed to make real-time world models accessible to developers, enabling interactive AI applications across media and entertainment, physical AI, and robotics.
According to the company, world models represent a major shift in artificial intelligence by moving beyond static content generation into systems capable of perceiving and responding in real time. Reactor aims to support a new category of media experiences that are dynamically generated and shaped by user interaction rather than pre-rendered in advance.
Reactor said its platform provides a unified SDK and API that enables developers to build real-time interactive applications with only a few lines of code, eliminating the need to manage the complexity of deploying and scaling these systems independently.
The company was co-founded by Alberto Taiuti and Bryce Schmidtchen, both former technical leads on the Apple Vision Pro. Taiuti previously co-founded Luma AI, where he served as CTO and helped build the infrastructure behind a widely used 3D and video generation platform.
Reactor’s broader team includes engineers and researchers from Apple, Netflix, Meta, Google, Adobe, Replicate, and Microsoft.
Reactor said it is already working with partners across media and entertainment and physical AI, with demand from film and television studios as well as robotics companies.
The company also highlighted collaboration with Overworld, which is leveraging Reactor’s infrastructure to support development around interactive world models.
In addition, Amazon Web Services will serve as Reactor’s preferred cloud provider, supporting the compute infrastructure and distribution required for real-time generative video workloads at global scale.
The Reactor platform is available today through SDK and API access with usage-based pricing tied to model type.
KEY QUOTES:
“World models are redefining what AI can do, moving from systems that generate content in isolation, to ones that perceive and respond in real time. We are building the critical layer between the model labs and the developers who want to create with them. This is about enabling a new form of media; one where experiences that weren’t previously possible, are generated live, and anyone can build and distribute them.”
Alberto Taiuti, CEO and Co-Founder, Reactor
“Real-time video models are currently inaccessible to developers due to a lack of infrastructure that can reliably serve them. Alberto, Bryce, and the team bring a rare combination of real-time systems expertise and product vision to this problem, and we believe Reactor is well positioned to become the foundational platform in this new category.”
Bucky Moore, Partner, Lightspeed Venture Partners
“Every major shift in media has been driven by new tools that expand what creators can do. AI is a transformative moment, but the real opportunity lies in making these technologies usable at scale. Reactor is building the platform that can enable a new generation of storytelling and interactive experiences.”
Jeffrey Katzenberg, Founding Partner, WndrCo
“Building world models is only part of the challenge, making them usable and responsive in real time is equally critical. Reactor provides infrastructure support that helps us bring these systems to developers and users, as we work toward building a new medium of interactive entertainment you can truly inhabit.”
Louis Castricato, CEO, Overworld
“Reactor’s real-time video platform demands inference infrastructure that can deliver at the speed of interaction, not just the speed of generation, and AWS is unmatched in solving for the latency, scale, and reliability that these workloads require. Profitable AI starts with lower-cost inference. From purpose-built chips to flexible AI services, AWS is uniquely positioned to help platforms like Reactor scale real-time generative video economically to developers everywhere.”
Jason Bennett, VP and Global Head of Startups and Venture Capital, AWS
