From Petoi · 30,000+ robots shipped

Quaddle | The Palm-Sized Robot 
That Talks Back, Walks,
& Teaches You Robotics Coding & AI.

Quaddle | The Palm-Sized Robot 
That Talks Back, Walks, Teaches You Robotics Coding & AI.

Quaddle is the world's first 4-servo omnidirectional quadruped robot. It reacts to your touch, holds a real conversation, and grows with you from beginner coding to advanced AI robotics - no lab required.

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🔒 Free to join.  Early access to our August 2026 Kickstarter launch.  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 can be built from a kit, programmed in Block coding, Python, C++, and runs on open-source firmware OpenCat. Each one adds more on top of the last - reserve now and choose your exact model at launch.

Quaddle Builder Robot stands

Builder

Curious kids & beginners

  • Walks with 90+ movements and does tricks
  • Raspberry Pi Zero socket + Arduino/ESP32 support
  • Decorate it with LEGO-compatible  blocks and custom 3D-printed parts

The essential open-source robot

Get Early Access →

MSRP - $139

Super early bird price - $99

Quaddle Buddy Robot stands

Buddy

Most people

  • Everything in Builder
  • Open-domain AI conversation
  • Learn & Replay - teach tricks by hand

Talks back, reacts to touch & remembers your moves

Get Early Access →

MSRP - $219

Super early bird price - $139

Quaddle Scout Robot stands

Scout

Makers, engineers & researchers

  • Everything in Buddy
  • Gesture, light & infrared sensors
  • Most advanced  senses light, objects & gestures

The full sensing & research platform

Get Early Access →

MSRP - $269

Super early bird price - $179

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 customizable and 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 Quadruped

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.

Quaddle robot stands and say hi

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.

quaddle robot button press
Quaddle robot corgi head

Make it yours

Snap on LEGO-compatible blocks, design, print & attach your own 3D-printed parts to personalize Quaddle's 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 → MicroPython → Python → C++ (Arduino IDE) → ROS
✅  Built on OpenCat, cited in 20+ academic papers
✅ Free curricula included for classrooms and self-learners

SMARTER ROBOT with sensors

Quaddle Scout 

The most advanced model

✅ Capable of sensing light and objects and detecting gestures.
✅  Compatible with AI vision module.

About Petoi Open Source Robots

30,000+

Robots shipped worldwide

$700K+

Raised on Kickstarter & Indiegogo

60+

Countries

Since 2018

Open-source OpenCat platform

Petoi Open Source Robot Family

Before you sign up

Exactly What You're Joining - No Surprises

💳
$0 today

The list is free to join. You will be notified when we launch Quaddle on Kickstarter.  Not buying - no card, no commitment.

🏷️
Best Price

By swapping expensive motors for smart mechanics, Quaddle is engineered to cost far less than multi-servo robots.  Founding backers get 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 information about Quaddle, launch dates and deals - that's it. One click to unsubscribe, always.

Petoi robots are Trusted by makers, STEM teachers & researchers

STEM educator testimonial on Petoi robots
CMU graduate student testimonial on Bittle robot dog
10-year old testimonial on Bittle robot dog and Nybble robot cat

Frequently Asked Questions

Have a Question? We’ve Got the Answer!

Do I pay anything to join?

No.  You will provide your email to get notified about the Kickstarter project launch.  If you want to lock in the super early bird price, you will pay $1 deposit, which is fully refundable if you decide not to back Quaddle's Kickstarter project.

Is Quaddle a toy? Do I need a technical background?

No background needed. Start with tap-to-record tricks(Buddy & Scout) and drag-and-drop block coding, then grow into Python and C++ whenever you're ready. It's just as at home on a research bench as on a desk.

What payment methods do you accept?

We accept major credit cards (Visa, Mastercard, American Express) as well as PayPal for secure and convenient payment. At this time, we do not accept cash on delivery or personal checks.

What's the difference between Quaddle and Bittle or Nybble?

Quaddle is Petoi's newest platform — a compact, affordable robotics kit with a 4-servo omnidirectional design, built-in AI conversation, a LEGO-compatible shell, and a Raspberry Pi Zero socket on every model. Bittle/Bittle X (9 servos) and Nybble/Nybble Q (11 servos) are built for more complex dog- and cat-like movements, while Quaddle trades some of that complexity for a smaller, more affordable form factor. All three share Petoi's open-source OpenCat platform, so they're all codable with blocks, Python, C++, or ROS.

Is the firmware open source?

Yes. Quaddle runs on OpenCat - GitHub's most-starred open-source quadruped project  with free curricula and STL files, supported by an active community.

Will you share STL files? Is the hardware open source?

Software is open on OpenCat — the same platform as Bittle and Nybble. We'll share 3D-printable shells and mounts for customization. Load-critical joints stay closed — they're injection-molded because printed parts can't survive Quaddle's dynamic moves. Full policy on the Kickstarter page.

Join 30,000+ Petoi robot owners — be first in line

Reserve your Quaddle - free

Join the early-access list to unlock founding-backer pricing and be the first to know when Quaddle goes live.

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🔒 $0 today · Kickstarter launches August 2026 · Unsubscribe anytime