Fourier, also known as Fourier Intelligence, develops humanoid robots and robotic rehabilitation systems.
Fourier, also known as Fourier Intelligence, develops humanoid robots and robotic rehabilitation systems. Founded in 2015 and headquartered in Shanghai, the company builds the GRx humanoid series alongside the Fourier Rehab portfolio of rehabilitation devices.
Sources: Fourier: GR-2 launch announcement, September 2024; Fourier Rehab: rehabilitation products brochure, February 2026
Fourier announced GR-2 on 30 September 2024 as a platform for developers, researchers and enterprises. The manufacturer’s technical brochure lists a 175 cm, approximately 63 kg humanoid with up to 53 degrees of freedom and a single-handed payload of approximately 3 kg. Its dexterous-hand options, teleoperation and developer toolkit support robot research and adaptation.
Sources: Fourier: GR-2 launch announcement, September 2024; Fourier: GR-2 technical specifications
Fourier unveiled GR-3 on 6 August 2025 with a focus on companionship and human interaction. Its current developer documentation lists a height of 165 cm, a weight of approximately 71 kg and up to 55 degrees of freedom with optional dexterous hands. The launch framed mobility support, health monitoring and physical rehabilitation as potential future applications.
Sources: Fourier: GR-3 unveiling, August 2025; Fourier: GR-3 developer specifications
Fourier Rehab’s portfolio includes ArmMotus EMU, a cable-driven system for upper-limb rehabilitation, and ExoMotus M4, a lower-limb exoskeleton for supported gait and sit-to-stand training. The RehabHub ecosystem brings together dedicated rehabilitation devices with their own intended uses and product documentation.
Sources: Fourier Rehab: rehabilitation products brochure, February 2026
FDA’s device-listing dataset includes Fourier GR-3 Humanoid Robot as a class I powered exerciser under product code BXB. Registration and listing do not establish approval, clearance or authorization, and this record supplies no 510(k) number. CE and ISO 13482 certification claims for GR-2 or GR-3 remain unverified in the reviewed product documents. Regulatory status should be checked for the named model, intended use and jurisdiction.
Sources: FDA: Fourier device registration and listing records; FDA: what registration and listing establish; Fourier: GR-3 developer specifications
Sources reviewed .
Platform maturity, autonomy stack, and flagship-system specifications in one view.
A concise view of platform maturity and deployment footprint.
Capabilities and model layers highlighted by the company.
Published operating specifications for the lead system.
In early 2026, Fourier unveiled the GR-3, a humanoid care robot advancing emotional AI in robotics.
Track Fourier Intelligence's valuation over time.
Fourier was founded in 2015 by Alex Gu (Gu Jie) and Zen Koh in Shanghai's Zhangjiang high-tech zone, with the mission of transforming physical rehabilitation through robotics. In 2017, Fourier unveiled the X1, China's first lower-limb exoskeleton with tactile feedback, and launched the M2 upper-limb rehabilitation robot.
By 2019, Fourier had deployed devices in hundreds of hospitals across more than 10 countries, establishing itself as a global leader in rehabilitation robotics. The humanoid pivot began in 2019 with development of the GR-1. In July 2023, the GR-1 was publicly unveiled at WAIC in Shanghai.
In 2024, Fourier unveiled the GR-2, a next-generation humanoid with comprehensive upgrades. The company rebranded, splitting into "Fourier" for humanoid robotics and "Fourier Rehab" for medical devices. Since founding, Fourier has completed nine funding rounds, including Series D backed by SoftBank Vision Fund II and a Series E in early 2025 worth nearly 800 million yuan.
In August 2025 Fourier positioned GR-3 as its first care-centric humanoid, emphasizing soft design, multimodal vision/audio/tactile interaction, dual hot-swappable batteries, and service scenarios such as companionship, education, and assisted living. Specs widely listed: 165 cm, 71 kg, 55 DoF, ~3h runtime per pack.
In early 2026, Fourier unveiled the GR-3, a humanoid care robot advancing emotional AI in robotics.
Fourier was founded in 2015. It announced GR-2 on 30 September 2024 and unveiled the care-oriented GR-3 on 6 August 2025. Its product portfolio includes humanoid platforms for research and interaction, alongside dedicated robotic rehabilitation devices.
