Code, design, diagrams, notebooks, sheets and workflows. Live on your desktop, tablet and phone at the same time. Run it on your own machine or in the cloud, with whichever models you choose.
Free for non-commercial use, no card. Home Circuit, cloud machines and cloud workflows need a paid plan.
Not a companion app — the same editors, the same agent, the same files.
A small app in the menu bar or system tray of your Mac, PC or Linux box. The work runs on your own hardware — the live session, not a synced folder.
Connecting your own machine is on the paid plan.
Connect to your Mac, PC or Linux box over your wifi.
Tunnel back to your machine securely. No ports to open on your router.
A Linux machine in the cloud, for when running Circuit at home is not possible.
So you screenshot the design. Describe the diagram in words. Re-explain the layout it can’t see. Then open the next tool and do it again.
You shouldn’t have to describe your own work to a machine that could just look at it.
Draw it. Your coding agent reads the board itself — the shapes, and how they relate to each other — not just a screenshot of it.
Draw a circle, rectangle, triangle or polygon freehand and a tidy one takes its place. Fill it with a gradient, give it an outline, drop a shadow behind it. The shape stays editable afterwards — drag its corners like anything else you drew with a tool.
Ask for it and it arrives as real objects: boxes, arrows, layers and text you can restyle, rearrange and export. Not a flat picture of a diagram — the diagram itself, with every fill, corner and line end still yours to change.
Claude Code, Gemini and Codex run right here, in real terminals on your own machine. Circle something, select it, then say what you want — what you select is what your agent sees. Code edits come back as an accept-or-reject diff.
Fix a word three lines back without tapping through the text. Search everything that has scrolled past. Select a chunk of output and copy it out — a stack trace, a filename, a block of results — without reaching for a mouse. In the assistant’s prompt box, the code editors and the terminals alike. It’s vim editing, if that means something to you.
You place the nodes and decide how they connect, so the shape is yours; it writes what goes inside them. It does everything you would expect of an automation tool, and a good deal that has nothing to do with automation.
It is part of the IDE you already have open, not a separate service to subscribe to. And it runs on your phone and tablet too.
Python and JavaScript run on the device itself — in notebooks, at a REPL and inside workflow nodes. Set breakpoints, step through, inspect the variables, and keep the scope alive from one cell to the next. Connect a Circuit and Python runs natively on that machine, with Go, Rust, C, C++ and Zig alongside.
Claude, GPT and Gemini run on our credits or on your key. Point it at an aggregator with your own key and the wider open-weight catalogue opens up. Or run a model on your own machine. On recent Apple hardware in the app, use the on-device models with no network at all.
Remove a background, clean up an image, read printed text out of a photo or screenshot — using the on-device models on your Mac, iPad or iPhone. No network, no key, nothing metered. Works on a plane.
Loop a folder on your own drive through AI — background removal, conversion, resizing, generation — and write the results straight back. No uploading, no per-file cloud bill. The same workflow can deploy to the cloud on a schedule, or whenever another app calls it.
The agent opens a real browser tab right beside your work, then drives it — clicking, typing, scrolling, filling the form. And it reads the page back: the console, the network requests and the DOM — so it can find its own bug rather than hand you one. In the desktop app it also takes screenshots.
None of the above could be added to an existing editor. A plugin inherits the seams of the thing it plugs into. It can add a panel.
It can’t make a whiteboard, a design canvas, a notebook, a spreadsheet, a workflow graph and a terminal into things one agent reads structurally and acts on — running on a phone against a machine at home. So the IDE was designed for AI, flexibility and connectivity from the start.
The studio in the web, the app on your desk, real terminals, your own coding agent and any model you bring — free, for personal, non-commercial work.
Free
Everything on your own desk
Every editor in the web, and the desktop app as a full code IDE — your projects, your files, your terminals, your coding agent, your own models. Nothing metered — for non-commercial work.
From $9
We run the AI
Cloud models on our credits instead of your key, the build-it-for-me wizards, the agent editing your documents rather than only reading them, and workflows deployed to run in the cloud.
From $20
Off your desk, and paid work
Reaching your own machine from a phone or tablet — on the network or, with Home Circuit, from anywhere. Cloud Circuit when you want a machine you don’t own. Working alongside someone in the same document. And the licence that covers commercial work.
Think with AI. Not just talk to it.
Free for non-commercial use, on your machine and in the web. No card either way.