Glasp
Social web highlighter with an AI clone trained on your notes.
About Glasp
Glasp is a social web highlighter built by Glasp Inc. that lets users mark up text on web pages, PDFs, and YouTube videos — with timestamps for video — and collect those highlights into a personal, searchable knowledge library. Browser extensions are available for Chrome, Safari, Firefox, Edge, Brave, and Opera, alongside iOS and Android apps, and the tool is used by a stated 2 million-plus researchers, writers, and lifelong learners. Its distinguishing feature is an AI clone, trained on a user's own highlights and notes, that acts as a writing partner: continuing paragraphs, drafting weekly digests of best reads, and surfacing insights drawn from the material someone has actually saved rather than a generic model. Additional capabilities include PDF chat, audio transcription, daily Kindle highlight reviews, shareable "quoteshot" images, and a knowledge graph for tracking what's been learned over time. Glasp also connects to note-taking and read-later apps such as Obsidian, Notion, Roam Research, Readwise, Pocket, Matter, Raindrop, Instapaper, Medium, Snipd, Hypothesis, Diigo, and Weava, and exposes a developer API along with an MCP connector for Claude and ChatGPT. The core highlighting extension is free; the site does not spell out paid-tier pricing in detail.
At a glance
- Company
- Glasp Inc.
- Platforms
- Web, Chrome Extension, iOS, Android
- API
- Available
- Integrations
- Obsidian, Notion, Roam Research, Readwise, Pocket, Matter, Raindrop, Instapaper
- Last verified
- August 2026
Who It's For
- •Writers, bloggers, and content creators.
- •Researchers and students.
- •Lifelong learners and knowledge enthusiasts.
- •Marketers and digital content teams.
- •Academic professionals and educators.
How It Works
- 1Users highlight and annotate web content, PDFs, and videos using the platform.
- 2Highlights and notes are organized into collections and used to train personalized AI models.
- 3The AI models help generate new content like paragraphs, summaries, and ideas based on curated data.
- 4The tool supports exporting content and sharing insights with a community of like-minded individuals.
How to Use Glasp
- 1Create an account and install the Glasp web highlighter extension.
- 2Highlight important content on websites, PDFs, or videos.
- 3Organize your highlights into collections or notes.
- 4Use the AI assistance features to generate writing, summaries, or ideas based on your curated highlights.
- 5Share your highlights and insights with the community or export your content.
Key Features
- •Web and PDF highlighting
- •AI clone trained on highlights and notes
- •YouTube video highlighting and summarization
- •PDF chat
- •Audio transcription
- •Knowledge graph
- •Quoteshot sharing
- •MCP connector for Claude/ChatGPT
Use Cases
- •Curating research highlights into a personal knowledge base
- •Generating blog drafts from saved highlights
- •Summarizing YouTube videos and PDFs
- •Sharing quotes and insights with a community
Pros & Cons
Advantages
- •Enables personalized AI models based on user-curated content.
- •Supports diverse content types (web, PDF, videos).
- •Fosters community sharing and collaboration.
- •Simplifies content organization and idea generation.
Disadvantages
- •Features may require a learning curve for new users.
- •Limited details on advanced AI capabilities compared to specialized tools.
- •Dependence on web extensions may have compatibility issues.
Alternatives
- Readwise
- Hypothesis
- Notion
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Frequently Asked Questions
What is Glasp?
Glasp is a social web highlighter built by Glasp Inc. that lets users mark up text on web pages, PDFs, and YouTube videos — with timestamps for video — and collect those highlights into a personal, searchable knowledge library.
How much does Glasp cost?
Glasp uses custom pricing — contact the vendor for a quote.
Is Glasp free?
Glasp is a paid tool and does not offer a free plan.
What are the best Glasp alternatives?
Popular Glasp alternatives include Readwise, Hypothesis, Notion.
What is Glasp used for?
Glasp is commonly used for Curating research highlights into a personal knowledge base, Generating blog drafts from saved highlights, Summarizing YouTube videos and PDFs.
Does Glasp have an API?
Yes, Glasp offers an API for developers.
What platforms does Glasp support?
Glasp is available on Web, Chrome Extension, iOS, Android.
Information Accuracy
Please note: While we regularly update all tool information including descriptions, features, pricing, and other details, this information may change over time as tools evolve and update their offerings. For the most current and accurate information, we recommend visiting the official website directly. Our goal is to provide you with comprehensive and up-to-date information to help you make informed decisions.