OpenArm ships as $6,500 open-source 7DOF humanoid arm
OpenArm is an open-source robotic arm project built for physical AI research and for work in contact-rich environments, tasks where a robot's end effector has to make careful, controlled contact with objects or people. Each arm has 7 degrees of freedom (7DOF), and the project describes it as built with high backdrivability and compliance, mechanical properties meant to make human-robot interaction safer, while still delivering payload capacity the project calls practical for real-world tasks.
A complete bimanual system, a matched pair of arms, is priced at $6,500 USD. Buyers can get a unit assembled or build it themselves (DIY), sourced through a list of verified and certified manufacturers the project maintains worldwide.
Beyond the hardware, the project also defines OpenArm Cell, a standardized test setup with a unified background, consistent lighting and fixed camera placement. The stated goal is to let researchers in different labs run experiments on OpenArm under matching conditions so results can be reproduced and compared, feeding into a shared discussion of the state of the art in physical AI research.
The project is pitched as a platform for teleoperation, imitation learning, simulation and real-world data collection in contact-rich tasks. Its maintainers say they are actively seeking contributors, research partners and company collaborators to develop it further, and participation is governed by a published Code of Conduct.
The source material is the project's own README. It does not name individual authors, an institution or a company behind the project, does not give a release date, and does not provide technical specifications beyond the 7-DOF count: payload capacity, weight, materials, actuator details and any comparison to other humanoid-arm platforms are all absent from the text.
Key facts
- OpenArm is an open-source 7DOF humanoid robotic arm built for physical AI research in contact-rich environments.
- A complete bimanual (two-arm) system costs $6,500 USD, available assembled or as a DIY build through verified manufacturers worldwide.
- High backdrivability and compliance are meant to make the arm safer for human-robot interaction while keeping practical payload capacity.
- OpenArm Cell, a standardized environment with fixed background, lighting and camera placement, is meant to make research results reproducible across different labs.
- The project's README names no individual authors, institution or company, gives no release date, and lists no specs beyond the 7-DOF count.
Why it matters
Humanoid-robotics research is often bottlenecked by hardware cost and by test setups that differ from lab to lab, which makes results hard to compare. OpenArm is pitched as a lower-cost, open-source answer to both problems: a 7DOF arm at $6,500 for a full bimanual system, paired with OpenArm Cell, a standardized rig meant to give separate research groups matching background, lighting and camera conditions so their results can be reproduced and compared against each other.
Who it affects
Physical AI and embodied AI researchers working on teleoperation, imitation learning and contact-rich manipulation are the direct audience, since the arm is pitched as a platform for exactly those workflows. It also reaches robotics hobbyists and makers who can build a unit DIY, and companies or labs the project is trying to recruit as contributors and collaborators.
How to use it
A complete bimanual OpenArm system costs $6,500 USD. It can be bought assembled or built DIY, and the project maintains a list of verified and certified manufacturers worldwide to source parts or complete units from. The project is open for contributors, research partners and company collaborators, with participation governed by a published Code of Conduct.
How solid is it
The only material available is the project's own GitHub README, a self-description rather than independently verified reporting. It does not name individual authors, an institution or a company behind OpenArm, and gives no release or publication date. Beyond the 7-DOF figure, it provides no further technical specifications: no payload capacity, weight, materials or actuator details, and no comparison to other humanoid-arm platforms.
Risks and caveats
The safety and compliance claims, high backdrivability, safe human-robot interaction, practical payload, are the project's own characterization and are not backed in the text by test data, benchmarks or third-party evaluation. The DIY option and the reliance on a worldwide list of manufacturers for assembled units also mean build quality and specifications could vary by source, though the text gives no detail on how that variance is controlled.
“With high backdrivability and compliance, it is built with safe human-robot interaction in mind while delivering practical payload capabilities for real-world applications.”
— OpenArm project README