Affordable parts
Built around a Raspberry Pi, common servos, printable components, and an actively evolving bill of materials.
Open-source robot pet · active prototype
Build a robot pet.Give your AI a body.
Molty is a four-legged robot pet you assemble yourself. It is being built to walk, talk, remember, and react when your AI agents get something done.
Walking now. Voice, memory, and agent connections are next.
- Prototype cost
- ≈$60
- Computer
- Raspberry Pi
- Status
- Walking
LIVE PROTOTYPE
PI-POWERED
REAL HARDWARE / JULY 2026
This is a working prototype—not a render.
Molty is being built in public from printable parts, common servos, and a Raspberry Pi. Every stable step, failed gait, loose cable, and working integration becomes part of the open build.
Watch the latest 48-second demo01 / BUILD
A robot pet you make yourself.
Print the parts, connect the servos, and bring Molty to life. Because you build the body yourself, the relationship starts before Molty takes its first step.
Open and repairable
Replace parts, modify behaviors, and make your Molty different from every other one.
Built in public
The BOM, failed gaits, fixes, and working demos are shared as they happen.
02 / BOND
More companion than voice assistant.
Molty is being designed to greet you, learn routines, remember interactions, and express what it is doing through movement and sound.
No notification dashboard. No face trapped behind another screen. Just a pet that shares your desk.
Walking and motion control
The current prototype walks, waves, and dances with Raspberry Pi-powered motion control.
Voice, memory, and expressive routines
These companion behaviors are the next build stage, not capabilities of today's walking prototype.
03 / CONNECT
Give your cloud agent a face and body.
Connect Molty to the agents already working for you. When an agent finishes a task, finds an opportunity, or needs attention, Molty can react in the room.
Agent connections are in early experiments. The reaction below is a concrete behavior the project is building toward.
See the agent reactionPLANNED REACTION
CONCRETE EXAMPLE
Trading agent makes a profitMolty celebrates.
LIVE PROTOTYPE PROGRESS
The messy middle is the project.
Molty wobbles. Servos disagree. Cables escape. Every failure is public—and every fix moves the pet closer to becoming something people can build and live with.
BUILDING IN PUBLIC
HOW MOLTY WORKS
Fast reflexes. Slow thoughts.
Molty does not wait for an AI model before moving. Balance and motion run through a fast local reflex loop. Planning, memory, and agent decisions happen through a slower reasoning loop.
That keeps the body responsive while the mind is still thinking.
Local motion control is working now, while gait refinement and recovery remain in development. The full agent loop is planned.
IN DEVELOPMENT
FAST LOOP
The reflex loop
Live sensor data becomes motor commands for gait, balance, recovery, and responsive movement.
SenseBalanceMove
PLANNED
SLOW LOOP
The agent loop
AI models interpret context, plan actions, form memories, and decide what Molty should do next.
UnderstandPlanRemember
LONG-TERM GOAL
The long-term goal is for both pathways to improve over time.
Better movement locally, and better decisions through memory and planning.
PRODUCT ROADMAP
Build the body. Grow the bond. Connect the agent.
Molty is a long-running robotics project, but the next steps are concrete: make the kit reproducible, make the pet expressive, and make agent connections useful.
Building now
01 / BUILD
A kit people can assemble
Affordable parts, printable components, documented assembly, stable walking, and repairable hardware.
Next
02 / BOND
A companion with personality
Voice, memory, routines, and expressive movement grounded in what Molty can sense and do.
Early experiments
03 / CONNECT
A physical body for agents
Turn meaningful agent events into movement, sound, attention, and shared rituals.
BUILD UPDATES
Want to build the first Molty?
Get the BOM, CAD files, and important build updates as they become available.
Follow @moltypet for build releasesUseful updates only. No weekly newsletter.
CREATOR OF MOLTY
“I'm building the robot pet I wanted on my desk: open, expressive, repairable, and connected to the agents already working for me.”
