MensorAI turns YouTube into your personal learning system. Take notes while you watch, research any topic with AI, and ask questions across your entire library.
Stop doomscrolling. Save videos with purpose and build a curated library.
Ask any question. AI digs through your library and YouTube, finds the right experts, and saves the best videos for you.
Chat with your entire video collection. Get answers pulled straight from your notes and saved videos.
Instant briefings, key takeaways, and quiz questions. Watch less, remember more.
Paste a URL or use the browser extension. Your library starts here.
Take rich notes as you watch. Track action items. Ask AI about the video.
Ask any question. AI searches your library and YouTube to find answers and new content.
Chat with your collection. Get answers pulled from everything you've saved.
Discover public lessons shared by other learners. Your notes are private by default.
Stop losing insights to scattered bookmarks and forgotten notes.
| Feature | Watch Later | Notion/Obsidian | MensorAI |
|---|---|---|---|
| Save videos | |||
| Rich note-taking | |||
| AI video chat | |||
| Research agent | |||
| Ask your library | |||
| Community lessons |
Start with a 7-day free trial — full Pro access, no credit card required
All your videos, notes, and insights stay with you forever. You just lose access to AI features like Speed Mode, Video Chat, and semantic search. You can still view and edit everything you've created.
Currently MensorAI is optimized for YouTube. We're focused on doing one thing exceptionally well. Support for other platforms may come in the future based on community demand.
Yes. Your notes are private by default. Only lessons you explicitly choose to publish become visible to the community. We never share or sell your data.
Starter gives you the core tool plus basic AI features (Speed Mode 5/mo, Video Chat 3 msg/session). Plus adds Research Agent, Ask Your Library, Socratic Questions, and knowledge graph syncing with higher limits. Pro removes all limits, for just $3/mo more than Plus.
After your 7-day trial with full Pro access, you'll need to choose a plan to continue. All your videos, notes, and data are preserved — you just pick the tier that fits your learning style.
I spent years watching educational content, feeling productive, but retaining almost nothing a week later. The gap between consumption and understanding was frustrating.
I built MensorAI to close that gap. It's built to help you retain what you watch, not to keep you watching.
This is a tool for the intentional learner. The person who watches to understand, not just to kill time.
Turn your watch history into real progress today.