Second brain, visualised
See how your
ideas connect.
Cortex turns scattered notes into a living network you can explore, query, and trust.
12k+
notes linked daily
0.4s
median retrieval
100%
private and local-first
Not another folder. A network that works for you.
Instant recall, cited
Ask in natural language and get answers drawn only from your notes, with a link to the exact source paragraph every time.
Backlinks without busywork
Every mention creates a two-way link. You see context coming in and going out, so no idea sits alone.
Yours, on your device
Local-first storage with end-to-end encrypted sync. Export everything as Markdown at any time, no lock-in.
“The graph showed me my thesis was hiding in notes I wrote eight months apart. I would never have found that link alone.”
Simple pricing
Free to start
1,000 notes free forever. Pro is $8 per month for unlimited notes, AI recall, and priority sync.
Get Cortex free