Glasp

Glasp is a social web highlighter for researchers and learners who want to capture, organize, and revisit knowledge from webpages, PDFs, and YouTube.

Key capabilities include:

• Highlighting with notes and tags across web pages, PDF documents, and YouTube transcripts, including timestamped video highlights
• AI summarization for YouTube videos, webpages, and PDFs, with support for models including ChatGPT, Claude, Gemini, and Mistral AI
• AI clone (chat with your highlights) built from saved highlights and notes to retrieve context and generate tailored responses
• Import and export workflows such as importing Kindle highlights (with daily review reminders) and exporting to Notion, Roam Research, and Obsidian, plus formats like Markdown, HTML, CSV, and JSON

Pricing: Freemium, Free ($0/month), Pro ($10 to $12/month), Unlimited ($25 to $30/month), with annual discounts.

What makes it notable is the combination of highlighting plus community discovery (following other users’ highlights) and AI features that turn a personal highlight library into a searchable, conversational knowledge base. Available as Web and as browser extensions (Chrome and Safari).