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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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Ello
✓ verifiedFreemium
Adaptive AI reading and math tutor for children ages 4-9 that listens and adjusts lessons in real time.
1.1K visits/mo
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wuko
✓ verifiedFree
Beta email tool that summarizes any web page, PDF, or YouTube link and lets you ask follow-up questions entirely by email.
2.6K visits/mo29K saves
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AI ChatDocs
✓ verifiedFreemium
Chat-with-documents tool that summarizes and answers questions across PDFs, Office files, websites and YouTube; free tier plus plans.
2.4K visits/mo
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Side Reader
✓ verifiedFreemium
Browser extension that adds a PDF viewer/chat sidebar to ChatGPT, Claude, and DeepSeek for reading and querying documents.
341 visits/mo
Pricing
No public pricing
No public pricing
Starter: $9.99/mo (250 messages/30 days)
Pro: $29.99/mo (1,000 messages)
Business: $49.99/mo (2,000 messages)
Free: $0/mo (limited uploads and file size)
Lifetime: $29 one-time (higher upload limits, capture-and-ask, custom prompts)
Core features
- ✦Real-time AI listening and adaptation
- ✦Interactive reading and math curriculum
- ✦Create-your-own books
- ✦Science of Reading-aligned library
- ✦Parent progress reports
- ✦Child safety filters
- ✦Email-a-URL workflow to get an AI summary back
- ✦Reply-based follow-up Q&A on the summarized content
- ✦Works on web pages, PDF links, and YouTube videos
- ✦Responds in the language you write in, independent of source language
- ✦Chrome extension for prefilled summary-request emails
- ✦Shareable insight threads via email
- ✦Chat with PDFs and Office documents
- ✦Website, sitemap and YouTube ingestion
- ✦Automated summaries and Q&A
- ✦Reference and quote extraction
- ✦Multi-document conversations
- ✦Chat history and workspaces
- ✦Split-screen PDF viewer alongside AI chat
- ✦Zoom and text-copy tools for PDFs
- ✦Upload history tracking
- ✦Capture-and-ask screenshot querying (paid)
- ✦Custom prompt support (paid)
Use cases
- →Helping young children learn to read
- →Building early math skills
- →Supporting struggling or advanced readers
- →Giving parents visibility into progress
- →Readers wanting quick digests of long articles
- →Researchers extracting insights from PDFs without uploading files
- →Multilingual readers getting gist of foreign-language content
- →Users preferring email workflows over installing new apps
- →Research and literature review
- →Legal document analysis
- →Document summarization and Q&A
- →Project knowledge lookup
- →Researchers reading and querying PDFs via AI
- →Students studying documents with AI help
- →Professionals reviewing reports using ChatGPT/Claude/DeepSeek
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