Reactor
Developer platform and API for real-time, interactive generative video and world models.
About Reactor
Reactor hosts real-time world models behind one SDK and API, so developers can build apps where generated video reacts to user input frame by frame instead of rendering a clip after a long wait. It handles deployment and scaling; builders pay per use, priced by model. Use cases include interactive entertainment, film and TV previs, robotics and simulation. Founded in 2025 by two former Apple Vision Pro engineers, it launched publicly in May 2026 with a $59M Series A led by Lightspeed.
Key Features
💰 Pricing
Usage-based, billed by model type.
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📊 Comparison vs Alternatives
| Feature | ||||
|---|---|---|---|---|
| Pricing | Paid | Freemium | Freemium | Freemium |
| Rating | — | ⭐ 4.8 | ⭐ 4.8 | ⭐ 4.6 |
| Free Tier | ❌ | ✅ | ✅ | ✅ |
| Popularity | 30% | 100% | 94% | 92% |
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