An open-source robotics kit for makers, hackers & STEAM educators. Learn robotics, coding, physical AI, and 3D printing on one desk robot — then personalize its looks, tricks, and AI persona to make it yours.
Start anywhere. Upgrade anytime.
Scout's radar head can be removed to become Buddy.
An ingenious mechanism allows a single motor to drive both the shoulder and knee. By replacing extra actuators with smart mechanics, Quaddle cuts costs and extends battery life while delivering agility that rivals—and in some ways surpasses—that of far more complex robots.
Watch this 2-minute video to experience Quaddle's AI dialogue and real footstep rhythms in action!
Fast running, gliding, sideways motion, and crisp in-place spins—all with just four servos.
Less complexity. More possibilities.
Swap the foot tips to conquer land, water, and gravity.
Build tomorrow, today.
Your robotics journey starts here.
Physically guide Quaddle through any movement — no code or app needed. Just tap to record and replay via its feedback servos.
Share your own moves with the OpenCat community.
The wilder, the better.
Join 30,000+ Petoi robot owners — get early access to our August 2026 Kickstarter launch.
Most robots wow you for a day and collect dust by the weekend. Quaddle talks back, reacts to your touch, and keeps surprising you.
It reacts, it plays, it keeps surprising you — this isn't a one-trick robot dog.
Quaddle Scout is the most advanced model, capable of sensing light and objects and detecting gestures. Compatible with AI vision module.
Transform Quaddle into entirely new robots—from bipeds to Mecanum-wheel rovers—with 3D-printed parts and the OpenCat platform. Prototype, iterate, and explore AI robotics—no big lab required.
Coming soon — control and interact with Quaddle in our free web simulator — no installation, works on mobile.
One 4-servo mini robot dog — from block coding to embodied AI research, every level is covered.
Join 30,000+ Petoi robot owners — get early access to our August 2026 Kickstarter launch.
We packed a powerhouse of multi-core processors and peripherals into a palm-sized frame for ultimate hacking and tinkering.
Snap-fit design for fast building and rebuilding.
Screw-free body. Ready in minutes. Walks for hours.
Drag-and-drop blocks on iPad or Android tablet. Graduate to Python when you're ready. AI coding helps you along the way.
Built on OpenCat — the open-source quadruped platform cited in 20+ academic papers. Block coding → Python → MicroPython → C++ (Arduino IDE) → ROS.
These aren't just buzzwords — they're what you actually build and learn, step by step.
Start with a free beginner block-coding curriculum and tutorials we will provide, then grow into Python, C++, and beyond at your own pace.
Built for classrooms: code it together, print your own parts, and see physical AI in action on real hardware, not a screen.
Plug things in. Make it yours.
This is hands-on physical AI — you can see the code, watch it move, and rebuild the loop yourself.
Join 30,000+ Petoi robot owners — get early access to our August 2026 Kickstarter launch.
Join 30,000+ Petoi robot owners — get early access to our August 2026 Kickstarter launch.
Dr. Rongzhong Li founded Petoi in his dorm lab in 2016. After his prototype OpenCat robot video went viral, he wanted to ensure the robot could truly work in more users' hands, rather than keep posting fancy demos branded as open-source that only experts could reproduce.
Quaddle is the next robot dog from that same team, on the same platform, backed by the same track record shown above. Dr. Li still reads all customer emails and handles a quarter of them directly.
Quaddle runs on OpenCat — GitHub's most starred open-source quadruped robot project since 2018.
Join 30,000+ Petoi robot owners — get early access to our August 2026 Kickstarter launch.