Your brain's
operating system
A living knowledge graph that learns from how you think. Connect Obsidian, Claude, and your own notes into one neural network that remembers - and forgets - like you do.
Other tools hand Claude your text.
Cyton hands it your judgment.
Search plugs your notes into Claude as a flat pile of text - a half-finished thought ranks the same as the idea you've sharpened for months. Cyton scores every memory the way your brain does: by how reliable it is, how much you value it, and how central it is to your thinking. So Claude leads with what you actually trust and return to, not the closest keyword match.
It answers from your conclusions, not your scratchpad.
Every note carries a reliability tier and a salience score. A consolidated idea outranks a raw capture; the thoughts you keep returning to outrank the ones you jotted once. Claude leads with your settled thinking, not the first keyword match.
It knows which of your ideas are load-bearing.
Cyton tracks your hubs - the concepts everything else connects to. Ask something broad and Claude anchors on your core ideas first, then follows the strongest links outward, the way your own recall actually moves.
It resurfaces what you'd have forgotten.
Every memory sits on a forgetting curve. When a note you haven't opened in weeks turns relevant again, Cyton flags it and feeds it in - so Claude reminds you of your own past thinking at the moment it counts.
It compounds every time you think.
Retrieval is static - it finds similar text and stops. Cyton rewires around you 24/7: links strengthen when ideas come up together, fade when they don't. Every session starts from a sharper map of your mind than the last.
Memory isn't flat.
Your PKM shouldn't be either.
Cyton models the same five memory systems neuroscientists have identified in the brain. Every note you take is classified, decays realistically, and consolidates over time.
Your notes.
Connected automatically.
Every conversation you have with Claude Code shapes your graph. When topics come up together in a session, Cyton strengthens the edge between them. Topics you stop discussing gradually decay. No manual linking. No tagging required - your thinking does the work.
Your notes,
enriched automatically.
On the Free plan, Cyton enriches your graph automatically - assigning tiers, extracting concepts, and linking ideas. To do it, the opening of each note (around the first 600 characters) is sent to Claude Haiku through Cyton's own account. No setup, no API key needed.
On Pro, that same enrichment routes through your own Claude Code instead. The note text goes to Anthropic under your account - Cyton's servers and API key are never in the loop. (See exactly what's sent below.)
Exactly what Cyton sends to AI.
And what never leaves your Mac.
Cyton keeps and searches everything on your machine. To enrich your notes and grow your graph, it works with Claude. Here is exactly what gets sent to AI, what never leaves your Mac, and what AI writes back - no fine print.
No note content is ever stored on a Cyton server, sold, or used to train a model. Crash reports are stripped of note content before they are sent.
Your vault.
Cyton watches it.
Point Cyton at your Obsidian vault and walk away. Every save is processed instantly - concepts extracted, nodes created, synapses updated. No plugins, no manual steps, no disruption to your existing workflow.
Curious how it actually works?
Go under the hood - the forgetting curve, the signals Cyton scores every note on, and how the graph rewires itself as you think.
Simple, honest pricing.
Free forever for individuals. Pro unlocks the full neural stack.
Download the app to get started. No account needed until you're ready to upgrade.