AI Tutor That Turns Lectures and Textbooks Into Notes, Chats and Practice Tests
Three college friends (YC) built an AI tutor that turns videos, PDFs and slides into notes, chat and quizzes.
In plain English
YouLearn is a study helper for students. You add lecture videos, textbooks or slides, and it makes notes, answers your questions and creates practice tests from that material. Three friends who met in college built it because long lectures and dense books slowed them down. Students pay a monthly subscription after a free start.
$70K/mo recurring revenue, 150K monthly users (founders, YC launch, May 2025)
Operator: David Yu, Achyut Krishna Byanjankar and Soami Kapadia (co-founders)
A named, real operator ran this and shared results publicly. The figures are their own.
Not disclosed.
The tool stack
Payments
OpenAI API ↗LLM / vision
Whisper ↗Speech-to-text
Prices are the vendors' published list prices as researched in Oct 2026 and change often — always check the vendor's pricing page.
Step-by-step setup
- Accept every format students have: videos, PDFs, slides.
- Turn each one into notes, a chat tutor and practice questions.
- Free tier to spread on campus, paid plan for heavy use.
- Grow through students sharing it and app-store search.
What's automated vs. the human 10%
The machine does
- Core AI generation/analysis
- Billing and onboarding
You still do
- Product quality and support
- Distribution and marketing
- Compliance and edge cases
Overview
Three college friends (YC) built an AI tutor that turns videos, PDFs and slides into notes, chat and quizzes.
Operator: David Yu, Achyut Krishna Byanjankar and Soami Kapadia (co-founders). Website: https://www.youlearn.ai/
Estimated split: about 90% of the work automated, 10% human.
Realistic income
In their May 2025 Y Combinator launch post the founders said YouLearn’s monthly recurring revenue grew from $1K to $70K in eight months, with 150,000 monthly active users. This figure is operator-reported, not independently verified. This is one operator’s result, often after months or years of work, and doesn’t predict yours. Check the live source — numbers change.
Risks
- The $70K/mo figure is from the founders’ YC launch post (May 2025); no later figure.
- Must support learning, not doing graded work for students.
- Big AI companies offer free study modes.
- Startup cost and time to first dollar are not disclosed.
*Income figures are illustrative ranges based on public pricing and typical outcomes reported by practitioners, not guarantees. Most new online businesses earn little or nothing at first. Not financial, legal or tax advice.
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