Name: Glasp AI
Brand: Glasp AI

Tool Introduction

Glasp is a social web highlighter and AI-powered knowledge management platform created to combat digital knowledge loss. It helps users capture, organize, and share insights from articles, research papers, and videos. The tool was inspired by a personal health crisis that led co-founder Kazuki Nakayashiki to consider the impermanence of personal learning.

The platform is built to preserve individual highlights as part of a shared digital legacy. Glasp promotes open learning by encouraging public sharing of annotations and summaries. The name stands for “Greatest Legacy Accumulated as Shared Proof,” underscoring its goal of collective intelligence.

Glasp blends AI with social collaboration to make content discovery easier and more meaningful. It supports users across more than 100 countries and is based in San Francisco, California. Unlike traditional note-taking tools, Glasp focuses on making knowledge visible through public engagement and personalized AI support.

Demo Available?

Glasp offers a free tier with instant access—no credit card or special signup needed.

Tool's Accuracy

Users describe Glasp AI’s tools as reliable for organizing and sharing highlights. The AI Clone feature answers questions using cited highlights, and summarization is praised for learning effectiveness.

Aggregate Rating

4.5/5 stars (estimated from informal sources and limited reviews)

Detailed Overview

Glasp combines browser-based annotation tools with AI features to enable shared learning experiences across web articles, PDFs, and videos.

What Glasp AI Does

Glasp offers browser extensions for Chrome and Safari plus an iOS app to highlight, annotate, tag, and summarize content from web pages, PDFs, and videos. Highlights are organized with notes or links and are public by default for community discovery. AI features include summarization tools, related content suggestions, and “AI Clones”—personalized bots trained on a user’s saved material. Users can export highlights or share them via Twitter, Microsoft Teams, or Slack integrations.

Who Glasp AI is for

Glasp serves individual learners like students, educators, researchers, writers, journalists, and lifelong learners who need structured digital knowledge capture. It also supports companies and schools that want to preserve institutional memory or onboard new members efficiently. Communities use it to build shared repositories of annotated insights.

Top Differentiators

Public-first sharing: Highlights are visible by default for easier discovery.
AI personalization: Includes summaries, recommendations, and custom chatbots.
Digital legacy focus: Helps users leave lasting intellectual contributions.
Cross-platform integration: Works across browsers, devices, video platforms.
Community knowledge base: User-curated insights accessible across the network.

Introductory Video

Founding Year

2021

Target Industry

B2C, B2B, SMB, Education, Research, Technology, Media, Knowledge-driven Enterprises

Available Integrations

Browser Extension: Available on Chrome, Safari, Edge, Brave, and other Chromium browsers for in-browser highlighting and annotation.
Notion: Exports highlights and notes via Notion API with formatting preserved; requires authentication and follows Notion’s API limits.
Obsidian: Supports manual export to Markdown for import into Obsidian vaults; not a live sync.
Kindle: Imports highlights manually from Kindle; includes daily review reminders and export options to other note-taking apps.
Pocket: Allows users to import saved content highlights into Glasp.
Medium: Enables importing of article highlights for centralized knowledge capture.
YouTube: Generates transcripts and AI summaries within the browser using models like GPT-4o, Claude, Mistral AI, and Gemini; requires captions or transcripts.

Free: Includes unlimited public highlights, basic YouTube summaries (3/day), PDF uploads and summaries (~5 files), and audio transcription and summaries (30 minutes/month).
Pro: Includes unlimited private highlights, unlimited basic YouTube summaries, advanced YouTube summaries (1,000/month), PDF uploads and summaries (100 files/month), audio transcription and summaries (300 minutes/month), and daily auto-sync/export to Notion.
Unlimited: Includes unlimited private highlights, unlimited basic YouTube summaries, advanced YouTube summaries (5,000/month), unlimited PDF uploads and summaries, audio transcription and summaries (1,500 minutes/month), daily auto-sync/export to Notion, and priority support.

A 50% discount is available for educators and students through the student discount page. Annual plans include two months free. Subscriptions can be managed in user settings. Access continues until the end of the billing period after cancellation.

Pricing last verified: 01/19/2026
Official Source: https://glasp.co/pricing
Disclaimer: Pricing is subject to change. Please confirm current pricing on the vendor site.

Features & Specs

Browser Extensions: Highlight webpages or PDFs directly in Chrome or Safari.
iOS App: Save annotations while browsing on mobile devices.
Highlighting & Annotation: Add text notes or tags for easy sorting.
AI Summarization: Uses GPT-3.5/4.0 (OpenAI), Anthropic models, Mistral AI for summaries.
Semantic Search & Recommendations: Powered by OpenAI embeddings with Pinecone storage.
AI Clones (Digital Me): Bots answer questions using your own saved highlights.
Public & Private Modes: Default sharing is public; privacy settings available for paid accounts.
Tagging & Organization: Link highlights thematically for fast retrieval later.
Social Discovery Tools: Follow others; browse trending notes globally.
Export & Integration Options: Share via Twitter or apps like Slack or Teams.
Supported Content Types: Web pages, PDF documents, online videos.
Technical Stack Details: Combines LLMs with

Security & Compliance

Data Handling/Storage Regions: User data is stored in separate namespaces within Pinecone, a vector database service.

Industry Use-Cases

Education

Students use Glasp to highlight and tag readings, then review AI summaries. Shared highlights support group learning. Educators organize resources and share annotated content with students for easier access.

Research & Academia

Researchers highlight findings and use AI search to discover related studies. Teams preserve insights collaboratively, while AI Clones enable future members to retrieve past knowledge through simple questions.

Business & Enterprise

Employees annotate key documents and share them across teams. AI Clones help new hires access institutional knowledge quickly. Teams highlight industry content and receive trend-based recommendations.

Media & Content Creation

Writers tag source material by project and summarize research with AI. Editors publish curated highlights on current topics to engage audiences through newsletters or social media.

Tool's Alternatives

Readwise
Focuses on aggregating highlights from sources like Kindle and Pocket with strong spaced repetition tools. It lacks robust social features but supports long-term memory retention.

Matter
Provides web and PDF highlighting with clean reading interfaces and mobile support. Its summarization is less customizable than Glasp's, but syncing across devices is seamless.

Noiz
Specializes in summarizing YouTube videos with multilingual support. It offers fast transcription but does not handle web or PDF content.

Glarity
A browser extension summarizing YouTube videos, web pages, and documents. It supports 12 languages but requires a ChatGPT account.

UpContent, Shareist, and Screvi
Offer basic content curation with some AI features. These tools do not match Glasp's level of AI summarization or social knowledge management.

Frequently Asked Questions

What platforms and devices does Glasp AI support?
Glasp works through browser extensions for Chrome, Safari, Edge, Brave, and an iOS app. It supports highlighting and annotating web pages, PDFs, and videos directly in-browser or on mobile.

How does the free plan compare to paid plans?
The Free plan includes unlimited public highlights, 3 basic YouTube summaries daily, 5 PDF summaries monthly, and 30 minutes of transcription. Paid plans increase limits and unlock private mode features, AI Clones, and integrations.

What are the main features of Glasp AI?
Features include highlighting across formats, tagging, GPT-based summarization, personalized AI Clones, semantic search with OpenAI embeddings via Pinecone storage, content exports, and community-based discovery tools.

Can I export my highlights from Glasp AI?
Yes. Users can export highlights to Notion via API with formatting preserved or manually to Obsidian as Markdown. Highlights can also be shared using Slack, Microsoft Teams, or Twitter.

What does the Team plan include?
The Team plan costs $50/month or $500/year. It provides everything in Pro plus 5,000 advanced YouTube summaries monthly, unlimited PDF uploads and summaries, 1,500 minutes of audio transcription per month, and priority support.

Who typically uses Glasp AI?
Users include students organizing study materials; educators sharing annotated resources; researchers preserving insights; businesses onboarding teams; journalists managing sources; and communities building shared knowledge bases.

What is an AI Clone on Glasp?
AI Clones are chatbots trained on a user’s saved highlights. They answer questions based on that personalized material using models like GPT-4o or Claude for context-aware responses.

Is data stored securely in Glasp AI?
User data is stored in separate namespaces within Pinecone’s vector database service to maintain organizational separation across users’ content.

Can I use Glasp for summarizing YouTube videos?
Yes. The platform generates transcripts and AI-powered summaries from YouTube videos inside the browser using supported language models. Captions or transcripts must be available for this feature to work.

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Glasp AI

A social web highlighter for active learners, readers, and writers.