Manus

Manus, developed by Butterfly Effect Technology Group, is a Chinese AI startup that built a general-purpose autonomous AI agent capable of completing complex, multi-step tasks end-to-end — including web browsing, coding, research, and file management — operating asynchronously in a sandboxed cloud environment. The product went viral in March 2025 after demos showcased its ability to handle long-horizon tasks far more autonomously than competing agents. Meta announced its acquisition of Manus for over $2 billion in December 2025.