Opennote

Opennote is an AI-powered notebook that pairs note-taking with an embedded tutor called Galileo, designed to answer questions and explain concepts based on the material a student is currently working with. Users can upload lecture slides, textbooks, and existing notes, or record lectures and paste YouTube links for automatic transcription and summarization, turning raw source material into structured, searchable notes. Built-in practice tools generate flashcards and quizzes from that content, and a tutorial generator can produce short videos and diagrams to explain difficult topics. The platform is aimed at students, self-learners, and researchers who want their notes, recordings, and practice material in one workspace instead of switching between separate apps for transcription, flashcards, and tutoring. Opennote is a Y Combinator-backed, Canadian-founded startup that grew to more than 50,000 student users on a freemium model, with a free tier and paid plans for additional media generation. In May 2026, document-intelligence company Reducto acquired Opennote. According to Opennote's own announcement, its team is joining Reducto and sunsetting its educational software in the following months, so the product's long-term availability to students is uncertain.