ReplayGlows vs Glasp
Glasp highlights across the web, PDFs, YouTube and Kindle books. ReplayGlows is built for learning from YouTube videos. Here is how they compare, feature by feature, with the source behind each Glasp claim.
Glasp is broader across the web: one highlighter for articles, PDFs, YouTube and Kindle books, with AI summaries and export to note apps. ReplayGlows focuses on YouTube: notes that reopen the video at their moment, study cards, and playlists or feeds you choose.
Feature by feature
Only features both tools can be compared on. Each Glasp cell links to its official source.
| Feature | ReplayGlows | Glasp |
|---|---|---|
| Timestamped notes on videos | Yes Notes saved at the exact moment of a YouTube video | Yes YouTube highlighter keeps a timestamp and jumps back to that second [2] |
| Return to the moment from a note | Yes Click a note to reopen the video there | Yes Click a timestamped summary point or highlight to jump to that second [2][3] |
| Full transcript beside the video | Yes When YouTube provides captions | Yes Full transcript beside the video, in each language YouTube has captions for [3] |
| AI summaries of videos | Partial Pro; uses your own OpenRouter or Cerebras key | Yes Summaries with ChatGPT, Claude, Gemini or Mistral; limited on the free plan [3][4] |
| Study cards with spaced repetition | Yes Free plan: 50 cards, 10 per video | Partial A free spaced-repetition calculator is listed; study cards are not described [2] |
| Search your saved notes | Yes Keyword filter on the Notes page | Yes Tags and search across saved highlights [2] |
| Playlists or collections | Yes Up to 3 playlists on the free plan | Partial Tags and one library; playlists are not described [2] |
| Export notes | Partial Chrome extension exports Markdown or JSON; web note export is part of Pro | Yes Markdown, HTML, CSV and JSON [2] |
| Export or sync to Notion or Obsidian | No Not offered | Yes Export to Notion and Obsidian; daily sync to Notion on the free plan [2][4] |
| Articles and PDFs | No Built for YouTube | Yes Highlights and summaries for web pages and PDFs [2] |
| Mobile apps | No Web app and Chrome extension | Yes iOS and Android apps [2] |
| Browser extension | Partial Chrome extension; public install being prepared | Yes Chrome, Safari, Edge and Firefox [2] |
| Free plan | Yes 10 videos, 50 notes per video, 3 playlists | Yes Free plan with usage limits [4] |
Choose Glasp if
- you want one place to highlight articles, PDFs, YouTube and Kindle books
- you need to export or sync notes to Notion or Obsidian
- you want iOS or Android apps
- you want AI summaries of videos now, on a free plan
Choose ReplayGlows if
- most of what you learn comes from YouTube videos
- you want notes that reopen the video at the exact moment
- you want study cards reviewed with spaced repetition
- you prefer playlists and feeds you choose to a recommendation stream
Pricing, as stated on each official site
- ReplayGlows
- Free: 10 videos, 50 notes per video, 3 playlists and 50 study cards (10 per video). Pro: $8/month or $72/year (50% off for students and teachers).
- Glasp
- Free: $0, with limits such as 3 basic YouTube summaries a day in the extension. Pro: $12.50 a month, or $150 a year billed annually (USD). Prices may change.
Sources
Official pages used for every Glasp fact on this page. Last checked: 15 October 2026.
- Glasp home page: https://glasp.co
- Glasp features page: https://glasp.co/features
- Glasp YouTube summary page: https://glasp.co/youtube-summary
- Glasp pricing page: https://glasp.co/pricing
Questions about Glasp
Is Glasp only for YouTube?
No. Glasp highlights web pages, PDFs, YouTube and Kindle books in one library. ReplayGlows is built around YouTube videos.
Can I export ReplayGlows notes to Notion or Obsidian?
Not today. The Chrome extension exports bookmarks and notes as Markdown or JSON. Note export from the web app is part of Pro.
Which should I pick for online lectures?
If lectures are your main source and you want timestamped notes and study cards, ReplayGlows is built for that: see the workflow for students. If you also want highlights across articles and PDFs, or mobile apps, Glasp covers more ground.
Ready to keep what you learn from YouTube?
Start with the free plan and take your first timestamped note today.