mindmap.io vs LMCanvas: which should you use? (2026)

LMCanvas gets the core idea right: linear chat is a dead end, conversations are trees, and you should be able to fork any point, run prompts in parallel, and keep every angle on one canvas. It is free, open-source under MIT, and local-first, with every canvas stored as plain JSON on your own machine. If you live on a Mac and already pay for Claude Code or Codex, that is a genuinely appealing setup. The question this page answers is what you give up to get it, and what changes once the work needs per-node models, AI that explores on its own, and a map other people can open without installing anything.

TL;DR verdict

Pick LMCanvas if you want a free, open-source, fully local macOS app that reuses a CLI subscription you already pay for, and you value owning your data as plain JSON over sharing or cross-platform access. Pick mindmap.io if you want one canvas that runs in any browser, switches between Claude, GPT, Gemini, and Grok per node on one subscription, auto-expands branches on its own, zooms a whole map down to keywords, and publishes as a public link anyone can clone. mindmap.io is free for up to 5 maps with limited AI built in, so you match LMCanvas on free mapping and get AI in every node from day one.

The comparison

Both tools start from the same conviction, so the branching rows are close. Both are free for up to 5 maps, and mindmap.io adds AI in every node on its free tier. LMCanvas wins two rows outright on open-source code and local-first privacy, and those wins are real: you can audit every line and it never sees your data. mindmap.io leads because the rows that turn a branch canvas into sustained thinking, per-node models, auto-expand, zoom summaries, ask-your-whole-map, and a link anyone can open, are the ones it was built around.

Mindmap: notes and AI on one keyboard-first canvas

LMCanvas and mindmap.io agree on the fundamentals. You fork from any node, or highlight a phrase mid-response and spawn a child that inherits the context above it, and every detour stays on the canvas. Where mindmap.io pulls ahead is what else lives next to those AI threads. Every node is either a note or an AI prompt, and one keystroke toggles between them, so a text, image, link, or file note sits beside a live conversation as a first-class node rather than a basic sticky note. LMCanvas testers have asked for things as small as hyperlinks inside sticky notes, which tells you how thin its note layer is today. mindmap.io is keyboard-first end to end: one keystroke forks a branch, one toggles a node, and navigation stays on the keys so a hundred-branch canvas keeps moving at the speed you think.

AI capabilities: per-node models, auto-expand, and four zoom levels

This is where the two diverge most. LMCanvas is multi-provider, but it routes through CLIs you install yourself, and the model is chosen per canvas: Claude Code for one board, Codex for another, cursor-agent for a third. mindmap.io makes the model a per-node choice. Claude can reason in one branch while GPT drafts in the next and Gemini checks the third, all in the same map on one subscription with no API keys. Auto-expand lets you set a direction and the AI asks its own follow-up questions and builds whole branches on its own, which LMCanvas does not do. AI zoom summaries condense every node across four levels, from Full to Tweet to Phrase to Keyword, so you read an entire map at a glance, while LMCanvas zoom is structural navigation only and never summarizes the content. mindmap.io also generates an interactive map from an article or pasted text, lets you search across the whole map, and lets you ask your whole map as a knowledge base that cites the nodes it answers from. None of those three appear in LMCanvas today. If your work already runs through an AI agent, mindmap.io can be driven by your own agent over MCP or an installable skill to create and grow maps programmatically, whereas LMCanvas.ai is a browser-based branching-chat canvas (BYO OpenRouter key) with no documented API, MCP server, or programmatic surface for an external agent to create nodes/maps; the “Git-based API / Python SDK” surfaced in searches belongs to a separate, similarly-named project, llm-canvas by LittleLittleCloud, not LMCanvas.ai.

Sharing: an interactive link anyone can clone

LMCanvas is local-first by design. Every canvas is plain JSON in a folder you own, with no account, no servers, and no sync, which is the right call if privacy is the whole point. The cost of that choice is sharing. There is no account and no cloud, so there is no live link to hand someone, and export beyond the raw JSON is not marketed, to the point that an HN tester asked for chat export outright. mindmap.io takes the public-thinking route. Export any map to Markdown, PNG, JSON, or a clean chat transcript, or publish a public, interactive, read-only share link that other people explore node by node and clone to make their own. Your reader does not just see a screenshot of your thinking. They walk it, branch it, and take it with them.

Choose mindmap.io if

• You want one canvas in any browser, not a macOS-only desktop app you install and authenticate a CLI for.
• You compare models constantly and want Claude, GPT, Gemini, and Grok switchable per node in one map.
• You want auto-expand to explore a direction for you and AI zoom summaries to step back from a hundred branches.
• You want a public share link readers can clone and the option to ask your whole map, on a free tier that includes AI.

Choose LMCanvas if

• You want a free, open-source app with no platform cost and code you can read and audit yourself.
• You want true local-first privacy, with every canvas as plain JSON on your machine and no account or servers.
• You already pay for Claude Code, Codex, or Cursor and want to reuse that subscription with no second AI bill.
• You work solo on a Mac and never need to share a map as a live link with anyone else.

What LMCanvas does well

LMCanvas is a credible, well-articulated take on the same idea we believe in, and its strengths are easy to respect. It is free and open-source under the MIT License, so there is zero platform cost and you can inspect every line. It is genuinely local-first: no servers, no account, and all canvases stored as plain JSON in a folder you own, back up, and delete on your terms. It reuses the provider CLI you already pay for, so there are no API keys to manage and no second bill, and the branching canvas itself is solid, with fork-from-any-node, highlight-a-phrase-to-branch, and parallel execution so you run the same prompt down two branches to compare. Built solo by an experienced young engineer off a demo that drew about 2.1 million views, it has real momentum. The trade-off, echoed in early user feedback, is that it is macOS-only with no Windows, Linux, or web yet, it asks you to install and authenticate a CLI before the canvas does anything, and rough edges remain, such as reported canvas-scroll bugs near the page edges.

FAQ

Is mindmap.io a good LMCanvas alternative?

Yes, especially if you like the branching idea but want it in a browser instead of a macOS-only app, with no CLI to install. mindmap.io gives you the same fork-any-point canvas plus per-node models, auto-expand, zoom summaries, and a shareable link, all without touching the command line.

Do I need to install a CLI or bring API keys to use mindmap.io?

No. mindmap.io runs in your browser with no install and no API keys. You get ChatGPT, Claude, Gemini, Grok, and more on one subscription, and you switch the model per node to compare answers in the same map. LMCanvas instead asks you to install and authenticate a provider CLI first.

Is mindmap.io open-source and local-first like LMCanvas?

No, and that is an honest point for LMCanvas. mindmap.io is a hosted web app, not an open-source local-first desktop tool, so your maps live in the cloud rather than as plain JSON on your machine. If auditable code and fully local storage are your top priorities, LMCanvas fits that better today.

Can I share a mindmap.io map with someone who does not have the app?

Yes. You publish a public, interactive, read-only link that anyone opens in a browser, explores node by node, and clones into their own copy. LMCanvas is local-first with no accounts or cloud, so there is no live link to share.

Does mindmap.io have a mobile app?

No, and that is deliberate. mindmap.io is built for the big screen where real thinking happens, with keyboard-first navigation and room to see a whole map. It is a focused desktop-web tool by design rather than a phone-first one.

Is mindmap.io free?

Yes. mindmap.io is free for up to 5 maps with limited AI. A paid plan unlocks unlimited maps, every frontier model, higher limits, and Milo. LMCanvas itself is free, though you still pay for whatever provider CLI subscription it runs on top of.

Try the canvas that keeps thinking with you

LMCanvas gives you a private, free branch canvas tied to one CLI on one Mac. mindmap.io gives you a canvas that runs anywhere, switches models per node, expands branches on its own, zooms across every node, and shares as a link anyone can clone.

Try mindmap.io free →

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