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YC S25

Opennote

The notebook that thinks with you.

About

Opennote is a notebook with an AI thinking partner built in. Feynman lives in your work: it edits your writing, references your knowledge and the web, runs background tasks, and gives feedback as you work.

Founders

Family Office Investors

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Industry & Focus

ConsumerAI-Enhanced LearningEducationSaaSProductivity