open robotzFind your build

THE OPEN ROBOT DIRECTORY

Good things
come in
parts.

Find your next robot to build. Discover open-source hardware, from the first printed part to the code that makes it move.

Explore the collection Made to be made your own.
IN THE OPEN / ARM
SO-101 follower arm: black 3D-printed links, a white gripper jaw and a LeRobot stickerLESS SCROLLING.
MORE BUILDING.
SO-101Photo: TheRobotStudio/SO-ARM100 README
$121.94per follower arm
Real hardware. Real files. Every spec has a source. Free to explore. Always.Curiosity starts here

01 THE COLLECTION

Find your kind
of robot.

Small hands. Big ideas. A rover for the long way home.
There’s a whole world of hardware to make your own.

28 robots to get curious about

The assembled two-finger gripper shown from two sides.Hand

Milan Amighi, Constantin Scholz, and Bram Vanderborght (Brubotics – VUB & imec)7 GitHub stars, snapshot Oct 30, 2026

Hands-on Tutorial: 3D Tactile Sensor Integration in Robotic Fingers for Smart Manipulation

3D-printed · actuators not documented

A two-finger gripper tutorial adds Melexis Tactaxis 3D force sensors to the fingertips for measuring normal and shear forces.

Cost
Not documentedNo cost in the reviewed sources
Can I sell it?
Check firstHW not documented · SW not documented
Open files
2 of 6BOM, code partial · PCB, sim not documented
Maintained
ActiveLatest activity Sep 4, 2026
RUNS ONROS 2PythonESP32
Photo: MilanAmighi/Hands-on-tutorial-on-3D-tactile-sensor-integration-in-robotic-fingers README
Overview graphic featuring a rendered articulated OpenEAI-Arm alongside hardware, platform, and evaluation panels.Arm

eai-yeslab141 GitHub stars, snapshot Oct 30, 2026

OpenEAI-Arm

Not documented · actuators not documented

A 6-DoF serial desktop arm with an independently controlled end-effector channel, built from published mechanical design files for manipulation research.

Cost
About CN¥5,500documented manufacturing cost
Can I sell it?
YesHW BSD-3-Clause · SW BSD-3-Clause
Open files
4 of 6PCB, guide not documented
Maintained
ActiveLatest activity Oct 17, 2026
RUNS ONROS 2Python
Photo: eai-yeslab/OpenEAI-Arm README
White desktop robotic arm with a gripper and blue tubing against a pale blue background.Arm

Source-Robotics3,415 GitHub stars, snapshot Oct 30, 2026

PAROL6

3D-printed · actuators not documented

A 3D-printed desktop robotic arm with open-source STL files, a bill of materials and assembly instructions.

Cost
Not documentedNo cost in the reviewed sources
Can I sell it?
Yes, with creditHW GPL-3.0 · SW GNU General Public License Version 3
Open files
5 of 6PCB not documented
Maintained
ActiveLatest activity Oct 22, 2026
RUNS ONROS 2Python
Photo: Source-Robotics/PAROL6-Desktop-robot-arm repository
Render of a reBot robotic arm with black and yellow links and a gripper.Arm

Seeed-Projects4,628 GitHub stars, snapshot Oct 30, 2026

reBot Arm Base Series

Mixed · actuators not documented

A two-model robotic-arm project with public STEP design files and BOMs for the B601-DM and B601-RS.

Cost
Not documentedNo cost in the reviewed sources
Can I sell it?
Yes, with creditHW CERN-OHL-W-2.0 · SW Apache-2.0
Open files
4 of 6Code partial · PCB not documented
Maintained
ActiveLatest activity Oct 30, 2026
RUNS ONROS 1ROS 2LeRobot+2
Photo: Seeed-Projects/reBot-DevArm README
An SSG48 gripper with a cable attached, shown against a light background.Hand

Source-Robotics184 GitHub stars, snapshot Oct 30, 2026

SSG48 adaptive electric gripper

3D-printed · 1 actuators

A 400 g adaptive electric gripper with adjustable gripping force and a 48 mm stroke, for assembly and human-robot collaboration.

Cost
Not documentedNo cost in the reviewed sources
Can I sell it?
YesHW Apache 2.0 · SW Apache-2.0
Open files
4 of 6Code partial · PCB not documented
Maintained
ActiveLatest activity Sep 27, 2026
RUNS ONROS 2Python
Photo: Source-Robotics/SSG-48-adaptive-electric-gripper repository
A pink 3D-printed robotic arm on a white background.Arm

Thayslm30

T.A.R.A. - Three-D Printed Affordable Robotic Arm

3D-printed · actuators not documented

A 3D-printed robotic arm with STL parts, Arduino control code and documented assembly steps.

Cost
Not documentedNo cost in the reviewed sources
Can I sell it?
Check firstHW not documented · SW not documented
Open files
5 of 6PCB not documented
Maintained
Not documentedNo activity snapshot
RUNS ONArduinoPython
Photo: Thayslm30/Three-D-Printed-Affordable-Robotic-Arm README

Costs are the maker’s documented figures, with their original scope. Stars are recorded GitHub snapshots, never a quality score. Active: activity within 90 days of the snapshot. Quiet: within a year. Dormant: longer. Read between the files

02 READ BETWEEN THE FILES

Open isn’t
one checkbox.

A public repository is a start. A buildable robot takes more. We look at six parts of every project, so you know what’s there before you get your hands busy.

01 / CAD

The shape of things.

Design files and printable parts. See what you can make, modify, and put together.

02 / BOM

Every little part.

A bill of materials. The shopping list behind the build, with costs where documented.

03 / ELECTRONICS

Under the shell.

Circuit designs, boards, and wiring. Custom hardware or off-the-shelf components.

04 / CODE

A mind of its own.

The software that brings it to life. Check the stack before you start building.

05 / SIMULATION

Try before you print.

A digital model to test, train, and explore before the hardware meets the real world.

06 / GUIDE

A way through.

Assembly instructions. Because a folder full of files isn’t the same as a finished robot.

AND ONE IMPORTANT QUESTION

Can you build it? Can you sell it?

Those are different questions. Hardware and software can carry different licenses. Every listing explains what’s available and what the documented licenses allow. If we don’t know, we say so.

THE NEXT GREAT THING MIGHT START ON YOUR DESK.

Less watching the future.
More putting it together.

Let’s find your build