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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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elium.com
✓ verifiedPaid
Enterprise AI knowledge-management platform for building a governed, searchable company knowledge hub teams actually use.
26K visits/mo
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Audeus
✓ verifiedFreemium
Text-to-speech reader that turns PDFs, docs, and web pages into natural audio with highlighting, on web and mobile.
54K visits/mo21K saves
Pricing
No public pricing
No public pricing
Team: 15€/user/mo billed yearly
Corporate: 20€/user/mo billed yearly
Free trial available
Free: $0/mo (limited uploads and Pro voices)
Pro: $9.92/mo (billed annually)
Core features
- ✦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
- ✦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-powered search and answers
- ✦Content approval and expiration workflows
- ✦Multi-language sharing with AI translation
- ✦Templates and rich content creation
- ✦Microsoft, Slack, Google Drive integrations
- ✦ISO 27001 security, EU hosting, GDPR
- ✦Natural AI voices for reading aloud
- ✦Supports PDF, Word, EPUB, and web pages
- ✦Synchronized text highlighting
- ✦Highlighting and annotation tools
- ✦Adjustable playback speed up to 3.5x
- ✦Apps for web, iOS, Android, and Chrome
Use cases
- →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.
- →Understand research papers
- →Study and homework help
- →Review contracts and reports
- →Translate and summarize documents
- →Central company knowledge base
- →Customer support and IT service desk
- →Onboarding and knowledge retention
- →Market watch and user insights
- →Listen to study material and documents
- →Boost focus for auditory learners
- →Read web articles hands-free
- →Get through reading backlog while multitasking
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