Comparing Glasp and Readwise Reader for saving highlights from YouTube videos and the web. Glasp is a free social highlighter, and Reader is a paid read-it-later app with review built in. Here’s how they compare, and where MensorAI fits if you save sources to write from.
Last reviewed: October 2026. The MensorAI team wrote this comparison. We try to be fair and accurate, and we’d encourage you to try both tools.
MensorAI started as a YouTube note-taking tool for learners. Now it saves articles, passages and YouTube moments as you go, and when you sit down to write, you ask across all of them. Every answer links back to the passage it came from.
| Feature | Glasp | Readwise Reader | MensorAI |
|---|---|---|---|
| YouTube transcript highlighting | Captions around the moment | ||
| AI video summaries | Basic | ||
| AI Q&A about video content | |||
| Social/community features | |||
| Article highlighting | Saves passages | ||
| Spaced repetition | |||
| Obsidian/Notion export | Markdown file | ||
| RSS feed reader | |||
| Free tier available | Saving is free |
Glasp is better if you want free highlighting and like sharing what you read. Readwise Reader is better if you read a lot across articles, books and newsletters and want a daily review with spaced repetition. MensorAI has no review or flashcards, so if remembering is the goal, stay with Reader. MensorAI fits when you save sources to write from: you ask across your articles, passages and YouTube moments, and every claim links back to the passage it came from.
MensorAI is for writers and creators who research newsletters, articles and scripts from what they read and watch. It doesn’t write the piece for you, and it has no summaries, flashcards or spaced repetition.
Glasp is better if you want free highlighting and like sharing what you read. Readwise Reader is better if you read a lot across articles, books and newsletters and want a daily review with spaced repetition. MensorAI has no review or flashcards, so if remembering is the goal, stay with Reader. MensorAI fits when you save sources to write from: you ask across your articles, passages and YouTube moments, and every claim links back to the passage it came from.
It depends on what the notes are for. If you write newsletters, articles or scripts, MensorAI saves the YouTube moment you’re watching with the captions around it, plus articles and passages, from a browser extension. You ask across everything you saved, and every claim links to the passage it came from. It has no summaries, flashcards or spaced repetition, and it doesn’t write the piece for you.
Saving sources is free. Asking and finding videos on YouTube need an active trial or a paid plan. You get a 7-day free trial of Pro features with a limited AI allowance. No credit card required. After that, plans are $9, $19 or $22 a month, and they differ only in how many AI requests you get per day.