Head to head · Chat & research · updated Oct 25, 2026
NotebookLM vs Glasp
NotebookLM scores 17 to Glasp's 10 on public evidence for summarize articles, videos & threads, and they rank #2 and #4 there. Both are free to start. Numbers below are the same public signals the ranking uses, recomputed nightly — nothing here is sponsored.
NotebookLM
A grounded research notebook that answers only from the sources you upload and can turn them into Audio Overview podcasts.
+ Answers are grounded strictly in your uploaded PDFs, Docs, URLs and YouTube videos with citations, and Audio Overviews turn them into a two-host podcast.
− Sources are capped per notebook and the free tier limits daily queries and audio generations.
Glasp
A social web highlighter with AI summaries of articles and YouTube videos that feeds your highlights into a personal knowledge base.
+ One-click YouTube transcript and summary plus highlight export to Notion, Obsidian and Readwise.
− The social feed and public highlights by default are not what everyone wants, and the AI features feel bolted on.
Side by side
public evidence| NotebookLM | Glasp | |
|---|---|---|
| Evidence score / 100 | 17 | 10 |
| GitHub stars | closed source | closed source |
| Hacker News stories, 30d | 1 | 0 |
| Release-feed mentions, 30d | 0 | 0 |
| Last activity | – | – |
| Pricing | Free tier · Free; NotebookLM Plus via Google AI Pro $19.99/mo | Free tier |
| Platforms | web, ios, android | web, chrome-extension, ios |
| Maker | Glasp |
Which one?
Pick NotebookLM if
- you want the stronger public evidence (17 vs 10)
- you need it on android
Best for studying a fixed set of documents.
Pick Glasp if
- you need it on chrome-extension
Best for highlighting and summarizing web reading.