Last updated: 2026-08-19
Glasp is a social highlighter for the web, PDFs, and YouTube videos, with an AI clone feature: it summarizes what you save using a choice of AI model, then builds a personalized AI trained on your own highlights. Over 1 million people use it to turn everyday reading into a shared, searchable knowledge base.
About Glasp
Founded in 2021, Glasp is a social web and PDF highlighter that lets people collect, organize, and share highlights from articles, PDFs, and YouTube videos as they read, storing everything automatically to a personal profile. AI-powered summaries, generated with a choice of ChatGPT, Claude, Mistral AI, or Gemini, turn passive reading into active learning, and users can train a personalized AI clone on their own highlights and notes.
Glasp stands for "Greatest Legacy Accumulated as Shared Proof" and centers on community learning: people follow like-minded readers, discover articles through others' highlights, and build a shared knowledge base together. Highlights export to Notion, Obsidian, Roam Research, and other note apps in Markdown, HTML, CSV, or JSON, and the platform has grown to over 1 million users worldwide among researchers, students, writers, and lifelong learners.
Pricing
Three tiers: Free ($0), Pro ($12/month or $10/month billed annually), and Unlimited ($30/month or $25/month billed annually). Pro adds unlimited private highlights, 1,000 YouTube summaries, 100 PDF uploads, 300 minutes of audio transcription, and Notion auto-sync. Unlimited removes every cap: 5,000 YouTube summaries, 1,500 minutes of audio, and priority support.
| Tier | Monthly price | What it includes |
|---|---|---|
| Free | Free | Free tier with usage limits: 3 YouTube summaries/day, 5 PDF uploads, 30 mins audio transcription |
| Pro | $10/mo | Annual billing at $10/month; monthly billing at $12/month. |
| Unlimited | $25/mo | Annual billing at $25/month; monthly billing at $30/month. |
Key Features
- Web & PDF Highlighting: Color-coded highlights save straight from any webpage, PDF, or YouTube video with no separate app or export step required
- AI-Powered Summaries: One click generates a summary of the page, PDF, or video using whichever model you've selected: ChatGPT, Claude, Mistral AI, or Gemini
- AI Clone Feature: Trains a personalized AI assistant on your saved highlights so it can answer questions and suggest articles based on your own reading history
- Social Learning Network: See what like-minded readers highlighted on the same article, and follow specific people whose annotations you find useful
- Multi-format Export: Send highlights to Notion, Obsidian, Roam Research, Evernote, and other note apps as Markdown, HTML, CSV, or JSON
- Kindle Integration: Pulls in Kindle eBook highlights automatically so they sit alongside web and PDF highlights in one profile
Pros
- Highlighting saves straight from the page you're reading, so there's no separate app to open first
- The social feed surfaces highlights other readers made on the same article, which is genuinely useful for finding what to focus on
- Choosing between four different AI models for summaries is unusually flexible for a highlighter tool
- Free tier covers public highlighting fully, so casual users never feel pressured to pay
- Exports to most major note apps, so highlights aren't locked into Glasp's own format
- The AI clone turns a highlight archive into something you can actually query later
Cons
- Public-by-default sharing may not suit professionals handling sensitive information
- Search and organization features could be stronger when managing large highlight libraries
- Limited mobile app support for PDF highlighting and image annotation
- Private highlighting requires paid subscription
- Highlighting may not work reliably on all websites without a page refresh
Frequently Asked Questions
What does Glasp actually cost?
Free costs nothing. Pro runs $12/month (or $10/month paid yearly) and adds unlimited private highlights plus Notion auto-sync. Unlimited runs $30/month (or $25/month paid yearly), removing every usage cap and adding priority support.
What do you get on Glasp's free tier?
The free tier runs to unlimited public highlights, three YouTube summaries a day, five PDF uploads, and roughly half an hour of audio transcription a month. Private highlights and Notion syncing are the two things it holds back for paid plans.
What should you use instead of Glasp?
NotebookLM is the closer research pick when you want AI answers grounded strictly in documents you upload rather than public web highlights. Mem takes a different route, an AI-first notes app that auto-organizes what you capture instead of highlighting it in place.
What separates Glasp from NotebookLM?
NotebookLM restricts its AI to a private set of documents you upload; Glasp highlights and AI-summarizes anything public on the open web, PDFs, or YouTube, then shares those highlights socially with other readers. NotebookLM leans toward grounded, citation-style research answers, while Glasp leans toward social discovery and everyday knowledge capture.
What does it take to start using Glasp?
Sign up at glasp.co or install the browser extension, then highlight text on any webpage, PDF, or YouTube video, each highlight saves automatically to your profile. Turn on AI summaries in settings and pick a model to generate your first summary within minutes.
Top Alternatives
- NotebookLM: Highlighting and sharing insights across the open web and YouTube is Glasp's job; NotebookLM is for answers grounded strictly in your own uploaded documents.
- Mem: Glasp adds a social layer to reading you already do. Mem is the better buy if you want an AI-first workspace that organizes notes on its own.
HokAI guides covering Glasp
- Best AI Tools for Summarizing YouTube Videos and Podcasts in 2026: AI Summarizer, MurmurCast and Glasp compared on price, automation and data handling for YouTube video summaries, plus when a free chatbot beats all three.
- Best AI Note-Taking Tools in 2026: Brain2, Glasp, Mem, and Gemini Notebook Compared: Brain2, Glasp, Mem, and Gemini Notebook solve four different note-taking jobs, not one. Real 2026 pricing, free-tier caps, and which one to skip entirely.
- Best AI Tools for YouTube Research in 2026: TubeAI, Gemini Notebook, AI Summarizer, Glasp, and Genspark compared for YouTube research: real 2026 pricing, free-tier limits, and who should pick each one.