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Opennote is an AI-powered learning platform that consolidates lecture materials, notes, and readings in one place and provides contextual explanations, practice tools, and video tutorials to help students understand course content.
Also known as Opennote, Inc.
Founders & leadership· Y Combinator alumni (S25)
Opennote was founded in 2025 by Rishi Srihari, Abhi Arya, and Vedant Vyas.
Investors · 7
Also in the syndicate · 2
Company profile
researched Aug 2026Opennote is an AI learning platform built around a notebook in which an AI assistant works alongside the user. Students consolidate lecture materials, notes, readings and uploaded files in one workspace, and the assistant (branded Galileo on the company's site, and earlier described as Feynman) reads the material being worked on to provide contextual explanations, Socratic questioning, feedback, practice problems, visual breakdowns, runnable code and step-by-step walkthroughs. Product modules include a rich text note editor, AI chat, a recorder that turns audio or a pasted YouTube link into notes and summaries, generated tutorial videos and diagrams, and inline flashcards and quizzes. A "spaces" feature lets users upload content or ask questions and receive AI responses in multiple formats, and users can collaborate, share journals and publish their learning to the community.
The company positioned the product for students, self-learners and researchers, describing itself as an interactive AI ecosystem for learning that lets users personalize and engage with course content by turning class materials into AI-generated videos, diagrams and workflows. Opennote, Inc. is a Delaware company that operated a subscription service with institutional licensing for schools and districts. In May 2026 Reducto, a San Francisco-based AI document-processing company, acquired Opennote to expand its document intelligence and unstructured data work, citing Opennote's expertise in helping users navigate dense educational material as relevant to Reducto's "document agents"; the Opennote team joined Reducto immediately and financial terms were not disclosed.
Founding story
Opennote was founded in 2025 by Abhi (Abhigyan) Arya, Rishi Srihari and Vedant Vyas, a team of three undergraduate computer science and software engineering students. Vyas was a University of Guelph engineering student and Srihari and Arya were students at the University of California, Irvine. The founders described prior experience building software at medtech, fintech and infrastructure startups and years of tutoring and teaching-assistant work, and said they built the study product they had wanted as students.
Business model
Subscription software sold directly to individual learners, with licensed subscriptions available to educational institutions such as schools and school districts. Payments were processed through Stripe, subscriptions renewed automatically and were non-refundable except where required by law.
Three pricing tiers: a free tier with limited daily chats, file uploads and journal views; a premium tier at $15 per month with unlimited access to free-tier features plus video generation and unlimited use of the spaces feature; and an enterprise tier for colleges and universities priced by quote.
Traction
The Y Combinator launch post stated more than 55,000 students used Opennote, and later coverage of the acquisition cited more than 50,000 students having used the platform. The company reported users in nearly 100 countries and a campus ambassador program with over 15 participants across North American universities. The team remained at three full-time employees through its Y Combinator batch.
Latest developments
In May 2026 Reducto acquired Opennote to expand its document intelligence and unstructured data processing capabilities, with the Opennote team and technology joining Reducto immediately and financial terms undisclosed. Reducto said the acquisition would strengthen its work on "document agents."
▸Full profile — market position, technology, go-to-market, geography, history, risks & controversies
Market position
Opennote positioned itself against static note-taking apps, passive quiz generators and legacy learning management systems by offering an AI tutor embedded in the user's notes with collaborative and social study features. It was categorized by Y Combinator under AI-enhanced learning, education, SaaS, consumer and productivity.
The product places an AI tutor inside the notebook itself rather than in a separate tool: it reads the user's in-progress work, offers guidance without re-explanation, and delivers explanations as practice problems, visual breakdowns, runnable code and generated videos. Collaboration features allow users to study together, share journals and publish learning publicly.
Technology
Opennote used custom systems built on Meta's open-source Llama large language models. The platform reads a user's working document to generate contextual explanations, practice problems, quizzes, flashcards, diagrams and generated tutorial videos, and can transcribe and summarize recorded audio or YouTube links into notes.
Go-to-market
Direct self-serve signup with a free tier and paid subscriptions, supported by a campus ambassador program with more than 15 student participants at institutions including McGill University, Clemson University, the University of Waterloo and the University of California San Diego. The founders also solicited introductions to student groups, clubs and institutions and offered a promotional discount through the Y Combinator launch post.
Undergraduate and other students, self-learners and researchers, plus educational institutions including colleges, universities, schools and school districts purchasing licensed subscriptions.
Geography
Headquartered in San Francisco, California, with earlier operations in Guelph, Ontario and Irvine, California. Users were reported in nearly 100 countries, and the campus ambassador program covered institutions across North America.
History
The company was founded in 2025 and initially operated from Guelph, Ontario and Irvine, California. It closed an all-equity, all-SAFE round of $850,000 in April 2025, announced in July 2025, and was accepted into Y Combinator's Summer 2025 batch, which carried an additional $125,000 of dilutive funding plus a further $375,000 upon completion of the program. The company subsequently based itself in San Francisco. In May 2026 Opennote was acquired by Reducto.
Risks & controversies
The company's terms of service disclaim warranties on AI output, noting that AI-generated responses may be inaccurate and that Opennote assumes no liability for misinformation or reliance on AI-generated content, and require users to avoid using AI output for cheating or plagiarism. Terms also state that user inputs may be used to refine and improve AI models and that AI interaction data may be stored.
Compiled by commissioned research from 8 cited public sources — announcements, filings, and press listed under research sources below.
Key figures
latest reportedCompany-reported or press-reported figures, each dated to when it was claimed — not independently audited.
Images
Competitors · 1
by search overlap
Companies competing with Opennote for the same Google search keywords, organic and paid, via search-intersection analysis.
Timeline · 2
launches, deals, and filingsReducto, a San Francisco-based AI document-processing company founded in 2023, acquired Opennote to expand its document intelligence and unstructured data processing capabilities and its work on "document agents." The Opennote team and technology joined Reducto immediately; financial terms were not disclosed.
All-equity round in SAFEs, closed in April 2025, led by Afore Capital with Sancus Ventures, Script Capital, Untitled Ventures and undisclosed angels. Funds earmarked for international expansion, scaling operations out of the Bay Area and hiring technical talent. Y Combinator acceptance came with an additional $125,000 of dilutive funding and a further $375,000 upon program completion.
$850K source ↗
Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.
In the news
▸Research sources · 8
primary sources listed
- Opennoteopennote.com · web
8 public sources were cited for this profile; the first-party ones are listed here.
Frequently asked questions
- What does Opennote do?
- AI-powered notebook and learning platform that embeds an AI tutor in students' notes and course materials.
- Who founded Opennote?
- Opennote was founded by Rishi Srihari, Abhi Arya, Vedant Vyas in 2025.
- Who are Opennote's investors?
- Opennote's investors include Afore Capital, Sancus Ventures, Y Combinator, Andreessen Horowitz, Script Capital.
- Who acquired Opennote?
- Opennote was acquired by Reducto.
- Where is Opennote headquartered?
- Opennote is headquartered in San Francisco, US.