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Fourier

Shanghai robotics firm bridging rehabilitation hardware and general-purpose humanoids.

Fourier (formerly Fourier Intelligence) was founded in 2015 by Alex Gu and built its reputation in rehabilitation robotics before moving into humanoids. It marketed the GR-1 as the world's first mass-produced humanoid, followed by the GR-2 and the GR-3 'Care-Bot'.

Fourier sells its GRx humanoids to research and enterprise customers, with named research users including ETH Zurich and Carnegie Mellon. The company raised roughly ¥800 million (about US$109 million) in a Series E in January 2025 from investors including Guoxin, Pudong VC and Prosperity7. Its rehabilitation division reaches more than 2,000 medical institutions across 40-plus countries — a distinctive distribution pathway few humanoid makers can match — and its commercial focus is now shifting toward healthcare-oriented platforms like the GR-3.