From Petoi · 30,000+ robots shipped
The Palm-Sized Robot
That Talks Back, Walks, & Teaches You To Code.
Quaddle is the world's first 4-servo omnidirectional robot dog. It reacts to your touch, holds a real conversation, and grows with you from drag-and-drop blocks to Python - no lab required.
Claim Early Access🔒 Free to join. No payment, no commitment. Founding-backer pricing revealed to the list first - unsubscribe anytime.
⭐ GitHub's most-starred quadruped platform
🎓 Cited in 20+ academic papers 🌍 Shipped to 60+ Countries
Three Quaddles. Pick where you want to start.
Every model walks, does tricks, and codes in Block, Python, and C++. Each one adds more on top of the last - reserve now and choose your exact model at launch.
Builder
FOR MAKERS AND CODER
- Walks, does tricks & omnidirectional movement
- Block / Python / C++ coding
- Raspberry Pi Zero socket + Arduino/ESP32 support
The essential open-source robot
Buddy
FOR MAKERS AND CODER
- Everything in Builder
- Open-domain AI conversation
- Learn & Replay - teach tricks by hand
Talks back, reacts to touch & remembers your moves
Scout
For research & classrooms
- Everything in Buddy
- Gesture, light & infrared sensors
- Most advanced senses light, objects & gestures
The full sensing & research platform
30,000+
Robots shipped worldwide
$700K+
Raised on Kickstarter & Indiegogo
60+
Countries
Since 2018
Open-source OpenCat platform
Before you sign up
Exactly What You're Joining - No Surprises
💳
$0 today
The list is free. You're reserving your spot, not buying - no card, no commitment.
🏷️
Best Price, First
By swapping expensive motors for smart mechanics, Quaddle is engineered to cost far less than multi-servo robots. Founding-backers see the price - and the biggest discount - before anyone else.
📦
Ships From Proven Team
Petoi has delivered 30,000+ robots since 2016. This isn't a first-timer's crowdfund gamble.
✉️
You stay in control
We email you launch dates and deals - that's it. One click to unsubscribe, always.
Why quaddle
Most Robots Wow You For a Day, Then Collect Dust
Quaddle keeps surprising you. It talks, reacts to touch, and never stops being hackable from your desk to a research bench.
🦿
Legs Reinvented
A retro-mechanical design drives full knee lifts with a single motor - slashing cost, boosting battery life, and making advanced walking easy to hack.
🧭
World's first 4-servo omnidirectional dog
Trots, glides sideways, and does crisp in-place spins - without piling on joints and actuators.
🛡️
Built to take a hit
100+ resilient motions on an adaptable, research-ready platform built for real-world challenges.
💬
Chat with it
Open-domain AI conversation - ask it almost anything (Buddy & Scout models).
👆
Touch it
Tap Quaddle and it reacts with movements and expressions. Control it from a free mobile app.
🧱
Make it yours
LEGO-compatible body shell - snap on any brick to personalize the look.
No code needed to start
Teach It a Trick with Your Hands
Physically guide Quaddle through any movement tap to record, tap to replay. No code, no app required.
✅ Learn & Replay available on Buddy and Scout
✅ Start with simple tricks, end up mastering robotics without realizing it
✅ Quaddle grows with you - desk toy today, research platform tomorrow
Code it your way
From drag-and-drop blocks to C++ and ROS
Drag blocks on an iPad or Android tablet. Graduate to Python when you're ready. AI helps you along the way.
✅ Block coding → Python → MicroPython → C++ (Arduino IDE) → ROS
✅ Built on OpenCat, cited in 20+ academic papers
✅ Free curricula included for classrooms and self-learners
A tinkerlab in your palm
Plug things in. Make it yours.
Multi-core processors and programmable peripherals packed into a palm-sized frame.
✅ Arduino / ESP32 module support to expand sensing and capabilities
✅ Built-in Raspberry Pi Zero socket on all models - run computer vision or any Pi project (Pi not included)
✅ ROS-ready for AI robotics, autonomous navigation, and reinforcement-learning research
The team behind Quaddle
Built on a platform that's already proven
Dr. Rongzhong Li founded Petoi in his dorm lab in 2016. When his prototype went viral, he set out to make a robot that truly works in real hands -not just fancy demos only experts could reproduce.
✅ OpenCat: GitHub's most-starred open-source quadruped project since 2018
✅ 30,000+ Bittle dogs & Nybble cats shipped to 60+ countries
✅ $700K+ raised across prior Kickstarter & Indiegogo campaigns
✅ Used in university research labs and K-12 classrooms worldwide
Real robots. Real people. Real love.
Trusted by makers, teachers & researchers
Quaddle keeps surprising you. It talks, reacts to touch, and never stops being hackable from your desk to a research bench.
★★★★★
“Since I started the autonomous swarm robot project with Bittle, I have learned many skills, such as Python socket communication, Linux command line, GIT, OpenCV, YOLO, Raspberry Pi, and ROS2.”
Reid Graves
★★★★★
I own multiple Petoi robots because they're fast, durable, and programmable. My boyfriend got one too! Using Petoi Skill Composer, I create fun new tricks easily. Highly recommend Petoi robots!”
Laila C
★★★★★
“I've tested several quadrupeds. Bittle stands out for its build quality, performance, affordability, and easy integration with our platform thanks to its open-source API and Petoi's great technical support.”
Muhammad Nadij
Everything you're wondering
Have a Question? We’ve Got the Answer!
Be first in line
Reserve your Quaddle - free