Capture sparks
Frictionless capture from anywhere. A thought becomes a node the instant it arrives — no folders, no filing, no friction.
Synapse
Sign inYour second brain, alive
Your mind,
illuminated.
Synapse is a note-taking app that thinks the way you do — capturing sparks, linking them into constellations, and lighting the path back to every idea you've ever had.
- 2.4M
- nodes linked daily
- 120ms
- median recall
- ∞
- thoughts, one graph
Three motions of thought.
The Synapse methodConnect ideas
Bidirectional links weave notes into a living graph. The more you write, the smarter the constellation becomes.
Recall instantly
Semantic search surfaces what you half-remember. Ask in plain language; your past self answers.