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Cortex
Second brain, spatially
ProductCanvasWhy CortexTry free
Now with spatial canvas

Your thoughts, in space.

Cortex is the note app for people who think in webs, not lists. Capture anywhere, arrange on an infinite canvas, and let links form themselves.

Start your vaultWatch the canvas

Free for personal use · Local-first · Export anytime

note · 2m ago

Working memory is a queue

Externalize the next action so the brain can keep thinking.

gtdcognition
linked · graph

Atomic notes win

One idea per node makes reuse cheap.

suggested link
accept

Meeting 03.12 → onboarding friction

Shared language: “context switch cost”

Everything a second brain needs. Nothing a second brain doesn't.

Designed for makers, researchers, and anyone whose best ideas arrive sideways.

⌘

Capture from anywhere

Global hotkey, share sheet, or email-to-vault. Your inbox is always one keystroke away.

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Canvas + graph

Pin notes on an infinite board. The graph updates as you rearrange — same data, two views.

✦

Ask your archive

Natural-language search that cites the notes it used, not a black-box summary.

Built for how ideas actually form

Ideas arrive incomplete. Cortex holds them in place long enough to grow, then shows you the path between what you knew and what you know now.

Bidirectional links
See both directions of every reference.
Daily notes
A soft inbox that stays part of the graph.
Source chips
Quotes keep URL, page, and date.
Soft export
Markdown and JSON, no ransom.

Give your ideas a place to live.

Import from Markdown or Obsidian in under a minute. Keep your files forever.

Get Cortex free
Cortex · Iteration 04 · SpatialIdeas deserve coordinates.