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Rodin extracts your intellectual fingerprint from personal writing and connects you with people who think like you.
Rodin is an AI-powered tool that extracts your intellectual fingerprint from personal writing. It analyzes your notes, essays, journal entries, or Obsidian vault exports to reveal how you think — your recurring themes, open questions, mental models, intellectual influences, blind spots, and core driving question. It then connects you with people who think like you.
An intellectual fingerprint is a structured AI analysis of your writing that reveals how you think. It has 8 layers: a one-liner summary of your intellectual project, recurring themes, open questions, mental models, intellectual DNA (who shaped your thinking), blind spots, a core question, and an archetype (a 3-word identity like "The Contrarian Synthesiser"). No two fingerprints are alike.
You paste your writing into Rodin. Our AI reads across your body of work and extracts patterns in how you think. It then runs a 12-dimensional cognitive topology analysis — measuring epistemic confidence, argument density, conceptual leap distance, and 9 other structural signals — to build a cognitive signature that captures not what you think, but how you structure thought. A public profile page is generated with a shareable link.
Anything you've written: notes, essays, journal entries, Obsidian vault exports, Notion exports, tweets, blog posts, or even long email threads. The more text you provide, the more accurate your fingerprint. At least a few thousand words works best. Rodin looks for what you keep returning to, not individual pieces.
Rodin uses three layers of matching. First, 512-dimensional embeddings are generated for semantic similarity. Second, Jaccard similarity scores compare overlap across fingerprint layers with learned weights. Third, our proprietary Cognitive Topology Analysis compares 12-dimensional cognitive signatures — how two people structure thought, not just what they think about. The final score blends 70% semantic + 30% cognitive topology.
Cognitive Topology Analysis (CTA) is Rodin's proprietary engine that measures how someone structures thought. It extracts a 12-dimensional cognitive signature from pure linguistic computation — no API calls. Dimensions include epistemic confidence, temporal orientation, argument density, conceptual leap distance, reference topology, dialectical complexity, abstraction level, and intellectual tempo. It captures whether you reason from authority or first principles, whether you think in abstractions or concrete examples.
Yes. Rodin accepts any text or markdown. For Obsidian, you can upload an entire vault folder of .md files at once — Rodin parses wikilinks and extracts knowledge graph structure as additional context. For Notion, export your workspace as markdown and paste or upload. Logseq, Roam, and any markdown-based tool work the same way.
Your intellectual twin is the Rodin user whose cognitive signature and intellectual fingerprint overlap most with yours. They're the person who thinks most like you across all dimensions — not just shared interests, but shared reasoning structures, similar blind spots, and overlapping core questions. Your profile page shows your intellectual twin and other similar thinkers.
A portion of your writing is stored to support your profile and enable fingerprint evolution over time. Your writing is not used to train AI models. You can delete your profile and all associated data at any time using your management link. See our Privacy Policy for full details.
Accuracy increases with the amount and variety of writing you provide. With a few thousand words of authentic personal writing, most users find the fingerprint remarkably resonant — especially the core question, blind spots, and archetype. The cognitive topology analysis is calibrated against linguistic research and produces consistent results across multiple analyses of the same writing.
When you create your profile, you receive a management link with a unique token. Visit that link to access profile management, where you can edit or permanently delete your profile and all associated data. If you've lost your management link, contact us for help.
Yes. Rodin is currently free to use. You can generate your intellectual fingerprint, create a public profile, and find similar thinkers at no cost. We may introduce premium features in the future, but the core fingerprint experience will remain free.