What it sells
An intelligent, visual knowledge base for learning complex topics.
Business model breakdown
Buyer: who owns the budget?
Individual students, researchers and lifelong learners pay for themselves; teams can collaborate free.
Trigger: what makes them buy now?
UnverifiedLearning or researching complex topics from many sources (PDFs, YouTube, notes) and wanting AI help to understand and organize them.
Workflow: what inputs become what output?
Capture sources (PDF annotation, web clipper, YouTube, Readwise, Zotero), take notes in cards, arrange them on whiteboards with bi-directional links, and use an AI tutor/agent to explain and organize.
Economics: what it saves and how it charges
Consumer subscription with AI credits as the upsell lever; yearly billing saves 25%.
Distribution: how it reaches customers
Self-serve: desktop (Mac, Windows, Linux), iOS and Android apps with a 7-day trial; also a CLI that works with Claude Code and Codex.
Funding history and coverage
| Round date | Stage | Amount | Investors | Source |
|---|---|---|---|---|
| — | Y Combinator Winter 2022 | — | Y Combinator | ycombinator.com |
Profiles summarize public reporting and company websites. Business-model notes are MaxBC's reading of that material, not confirmed facts; unknowns are left blank rather than guessed. Updated 2026-10-12.