The SO-101 robot arm, ready to run out of the box.
Hashtag Robotics builds engineering-grade robot platforms on top of the open robotics ecosystem. Our first platform is the SO-101: a 5 DOF desktop robot arm with a parallel gripper, compatible with Hugging Face LeRobot. It ships as leader plus follower, assembled and tested, so you plug it in and start working straight away. Pre-order for the first batch is open.
First batch is limited. Pre-order is not binding and no payment is collected at this stage. When your slot opens, we reach out first with pricing and delivery.
What the SO-101 is, at a glance
A compact, open-design desktop arm built for real robot-learning work, not a toy and not a kit you have to assemble.
Built for people who actually want to run robot policies
Leader plus follower out of the box means you can teleoperate, record demonstrations and train policies on day one.
Researchers and labs
Collect demonstrations, run imitation learning and benchmark policies on a standard, reproducible SO-101 platform that drops straight into a LeRobot workflow.
Educators and students
A real 5 DOF arm for robotics, control and machine-learning courses. It arrives assembled and tested, so class time goes into learning, not into building hardware.
Builders and engineers
Prototype manipulation, teleoperation and data-collection pipelines with leader and follower arms, on top of an open, well-documented design you can extend.
SO-101, answered
The things buyers ask us most before they pre-order.
Does the SO-101 arrive assembled?
Yes. The SO-101 ships fully assembled and tested. It is not a kit, so there is no build step on your side. You plug it in and start working with it right away.
What does leader plus follower mean?
The SO-101 comes as two arms. The leader is the operator-guided controller arm you move by hand, and the follower is the task arm that mirrors it. Together they let you teleoperate and record demonstrations for imitation learning.
Is the SO-101 compatible with LeRobot?
Yes. The SO-101 is compatible with Hugging Face LeRobot in Python, covering teleoperation, data collection, imitation learning and policy training. It is based on the open SO-ARM100/SO-101 design. SO-100 is the earlier version and SO-101 is the current one; SO-ARM100 and SO-ARM101 are the same family naming.
How does the pre-order work?
Pre-order is free and collects no payment today. You register your interest, and when your slot opens we reach out first with pricing and delivery details. There is no commitment at this stage.
Reserve your SO-101
Join the free pre-order for the first batch. No payment today · assembled and tested · LeRobot compatible. We reach out with pricing and delivery when your slot opens.
Pre-order the SO-101