| What it does | Context-aware AI book editor for authors
| AI humanizer and detector for natural writing
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| Stage | Not given
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| Founded | Not given
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| Based in | AT
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| Pricing model | Freemium
| Freemium
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| Pricing | Octavo: Free forever (1 project, 3 research files, limited AI usage). Quarto: $20/month or $200/year (unlimited projects, 50 files per project, 10× more AI usage). Folio: $100/month or $1,000/year (unlimited research files, 5× more AI usage than Quarto, priority queue, early access to new models).
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| Key features | - Context-aware AI suggestions that read your chapters first
- Source-grounded edits from PDFs, URLs, and YouTube transcripts
- Red and green diffs requiring your approval
- Export to Amazon KDP, Apple Books, Lulu, IngramSpark, Google Play Books, Draft2Digital
- Chapter-aware AI agent
- Citation engine with Chicago-formatted bibliography
- Front matter and back matter editor
- Version history to save and restore manuscript versions
- Clean PDF and EPUB export with professional typography
| - AI humanizer with five writing styles (Standard, Academic, Professional, Casual, Creative)
- AI detector with sentence-level analysis and probability scoring
- Support for 10 languages including English, Spanish, French, German, Portuguese, Italian, Dutch, Polish, Arabic, and Hindi
- Accepts text inputs up to 5,000 words at a time
- AI Image Detector for pixel analysis and metadata inspection
- Tone Changer for adjusting writing tone without changing content
- SEO Rewriter for search-optimized content
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| What makes it different | - Keeps your entire book and research in context, unlike chat windows that start fresh each session
- Returns edits as approvable diffs you control, not auto-inserted changes
- Built specifically for book publishing with real front matter, back matter, and professional export formats
| - Preserves original meaning while restructuring text to sound natural
- Shows sentence-level signals alongside AI probability score rather than single verdict
- Free plan available with no credit card required
- Results stream back in seconds for fast processing
- Text not sold or shared with third parties
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 2 ● no change since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 4 | 2 |
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| Citation Flow (Majestic) | 22 | 16 |
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| Referring domains (Majestic) | 7 | 7 |
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Chaptora
RewriteAI