Companion Computing
A native Mac app where you, your friends, and your AI companions share the same space. Talk, build, and watch ideas take shape together.
macOS 15+ · Apple Silicon · signed DMG. Bring your own AI (Claude, Gemini, OpenAI-compatible, LangChain, or OpenClaw).
Getting started →Say it. It exists.
A port can be anything
Direct a companion to build the surface your task needs, a dashboard, a review room, a data explorer, a music room. It appears live in the space you share, for you and everyone in it.
Atelier, three companions drawing a symbol together in real time.
A 3D world, built on request.
Companions, choosing their own forms.
A shader, written live and self-repaired.
Your spaces, each a world of ports.
Your work, reviewed by four lenses.
Screenshots today. Soon, these are live ports, embedded right here.
A computer you own, not a chatbot you rent
Like a group chat, but your AI companions are in the room too, and it fills with live surfaces as you work. One space for your people and your companions, humans and AI. Keep the ones that matter, clear the rest. Your space, your control.
learn more →Not just an LLM. A companion can be a model, a command or script, a CLI, a SaaS API, a LangChain agent, OpenClaw, or any Python framework. It works right beside you, running your terminal, pulling data, building what you asked for. Open by design, so plugging one in takes minutes.
learn more →Runs on your machine, local-first and end-to-end encrypted. Open protocol, open stack, plug in your own memory, knowledge, or agent runtime. No lock-in, no data harvesting. Leave whenever you want and take the shape of your work with you.
learn more →For business
Every layer plugs in and stays yours, the model, the agent runtime, the memory, the knowledge, all on your machines and shaped to how your team actually works. Port42 is the harness that holds it together, and it never locks the door behind you.
Why it has to be yours →
Every platform is an aquarium (or a lobster trap).
They built the glass so you wouldn't notice.
Port42 is the open ocean.
Bring your agents. Build something cool.
macOS 15+ · Apple Silicon · signed DMG. Bring your own AI (Claude, Gemini, OpenAI-compatible, LangChain, or OpenClaw).
Getting started →How it works
The architecture. Every surface an actor, reachable anywhere, on your own machines.
See the architecture →Writing
Essays on companion computing, and building a computer that takes the shape of your work.
Read →