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Side-by-side features, use cases and pricing — because the right pick depends on your job and budget, not just the ranking.
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ChatPDF
✓ verifiedFreemium
Popular tool to chat with PDFs and other documents, giving summaries and cited answers, with a free daily tier and no-signup start.
1.8M visits/mo43K saves
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Ragie
✓ verifiedFreemium
Managed context/RAG API that indexes, parses and retrieves documents, images, audio and video for developers building AI agents.
16K visits/mo
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Context Link
✓ verifiedFree trial
Connects your docs, inboxes and apps into one source-backed knowledge base that ChatGPT, Claude and agents can query.
19K visits/mo
Pricing
No public pricing
No public pricing
No public pricing
Developer: Free (1,000 max page processing)
Starter: $100/month (10,000 total pages)
Pro: $500/month (60,000 total pages)
Context: $19/seat/mo (7-day trial)
Context + Lenses: $59/mo (then $19 per extra seat)
Free trial available
Core features
- ✦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
- ✦AI Chatbot powered by ChatGPT, GPT-4o & Gemini
- ✦Available on multiple platforms (Web, iPhone, Apple Watch, macOS, Android)
- ✦Humanlike responses
- ✦Homework assistance
- ✦Proofreading
- ✦AI Writing Assistant
- ✦Lifelike voice AI agents
- ✦24/7 availability
- ✦Customer-led conversational platform
- ✦Integration with enterprise systems
- ✦Hybrid vector, keyword and summary indexing
- ✦Native connectors to Google Drive, Notion, Slack and others
- ✦Multimodal ingestion of text, PDF, image, audio and video
- ✦Agentic OCR document parsing with structured extraction
- ✦Custom entity extraction via plain-language instructions
- ✦MCP server for permissioned agent access
- ✦Multi-tenant data partitioning
- ✦Unifies docs, websites, inboxes and files into one synced knowledge base
- ✦Works with ChatGPT, Claude, Copilot, Gemini and MCP-aware agents
- ✦Source-cited answers with reviewable past lookups
- ✦Save settled decisions as reusable Memories
- ✦Sources auto re-sync every 24 hours
- ✦Exclude anything you do not want indexed
Use cases
- →Understand research papers
- →Study and homework help
- →Review contracts and reports
- →Translate and summarize documents
- →Get help with homework, from essays and compositions to math questions.
- →Proofread written work to create professional-grade documents.
- →Get personalized help with any writing project, from essays to social media posts.
- →Act as a travel agent.
- →Answering customer service calls
- →Providing information and support
- →Resolving customer issues
- →Automating call center operations
- →Adding accurate retrieval/context to an AI agent or assistant
- →Building AI search over a company's Drive/Notion/Slack knowledge base
- →Extracting structured entities and tables from documents at scale
- →Let AI answer questions about your business from existing content
- →Give e-commerce or agency teams one place to query support, brand and catalog docs
- →Keep canonical decisions like pricing or ICP current across every AI tool
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