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AI knowledge base that saves, summarizes and connects articles, videos, podcasts and PDFs into a graph you can chat with.
Popular tool to chat with PDFs and other documents, giving summaries and cited answers, with a free daily tier and no-signup start.
Engagement suite adding live chat, comments, polls and live blogs to publisher and brand sites to grow and monetize audiences.
Lets you chat with any YouTube video for timestamped answers, best for learners and researchers skipping long watch time.
White-label custom-GPT chatbot builder for agencies reselling AI support bots trained on client sites, files and 5,000+ apps.
No public pricing
Free trial available
- ✦One-click saving of articles, videos, podcasts, PDFs
- ✦AI summaries of saved content
- ✦Automatic tagging and knowledge-graph linking
- ✦Chat with your knowledge using GPT, Claude or Gemini
- ✦Spaced-repetition quizzes
- ✦Browser extension, web and mobile apps; API/MCP access
- ✦Chat with PDFs, Word, PowerPoint and text files
- ✦Summaries with cited sources
- ✦Multi-file chats via folders
- ✦Any-language upload and chat
- ✦Extra tools: AI writer, detector, flashcards, slides
- ✦No-signup quick start
- ✦Threaded comments
- ✦Real-time group chat
- ✦Live blog streams
- ✦AI polls and moderation
- ✦First-party data capture
- ✦No-code website embed
- ✦Q&A on any YouTube video
- ✦Answers cited with timestamps
- ✦Video and audio upload transcription
- ✦Command-line interface
- ✦Cross-video search and collections
- ✦Embeddable chatbot widget
- ✦Train bots on websites, documents and YouTube
- ✦5,000+ integrations plus API-driven actions
- ✦One-line widget embed and messaging-app channels
- ✦Full white-label and multi-client management
- ✦Switchable models (GPT, Claude, Gemini, Mistral)
- ✦95+ languages with analytics and lead capture
- →Building a personal 'second brain'
- →Summarizing long content to save time
- →Chatting with your own saved knowledge
- →Retaining what you read via spaced repetition
- →Understand research papers
- →Study and homework help
- →Review contracts and reports
- →Translate and summarize documents
- →Live event coverage
- →Growing on-site community
- →Monetizing audience with ads
- →Capturing first-party data
- →Studying lectures interactively
- →Extracting insights from webinars
- →Getting steps from tutorials
- →Searching across a playlist or channel
- →Automating repetitive customer support
- →Agencies reselling branded chatbots
- →E-commerce and lead-generation assistants
- →Multilingual website help desks