Notes for people who think in systems
Your second brain.
Capture ideas the moment they arrive. Cortex links them so recall feels automatic.
Built for long-term thinking, not inbox zero.
Cortex keeps capture friction near zero, then quietly builds the graph you will need weeks later.
Instant capture
Dump a thought without leaving the task you are already in.
Bidirectional links
Related notes surface as you write, so connections form on their own.
Search that understands
Ask a question in plain language. Get the notes that actually answer it.
Local-first
Your library lives on your machine first, then syncs when you want it to.
Three steps. No ceremony.
Capture
Hotkey, mobile share sheet, or a plain text inbox. Whatever is fastest in the moment.
Connect
Link a note once. Cortex proposes the rest from shared language and nearby ideas.
Recall
Search by meaning, not exact wording. The right page opens with its neighbors in view.
Start the brain you will still use in five years.
Free for personal libraries. Export anytime. No account required to try the desktop app.