| What it does | Native AI writing assistant for Mac and Windows
| Context-aware AI book editor for authors
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| Stage | Not given
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| Founded | Not given
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| Based in | LU
| AT
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| Pricing model | Paid
| Freemium
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| Pricing | Monthly subscription €8/month or annual subscription €75/year (€6.25/month with 22% savings). Both plans include full access to all features: unlimited devices, unlimited AI requests, multi-language support, works in any app, and 30 days money back guarantee.
| 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 | - Grammar and spelling correction with AI-powered suggestions
- Instant translation to and from any language
- Tone adjustment from casual to professional, friendly, or persuasive
- Text summarization into bullet points
- Smart rephrasing for clarity and flow
- Custom prompts with keyboard shortcuts
- BYOK support with OpenRouter integration
- Works in any application without tab switching
- Multi-language interface support
- GDPR compliant with EU data centers
| - 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
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| What makes it different | - Native desktop application that works everywhere without browser dependency or tab switching
- Privacy-first architecture with zero data storage or processing of user texts
- Highly customizable with custom prompts and hotkeys for personalized workflows
- Contextually accurate translations that preserve meaning, not just words
- All-in-one tool covering grammar, translation, content generation, and tone adjustment
| - 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
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 17 ▲ +1 (up) since last check | 2 ● no change since last check |
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| Trust Flow (Majestic) | 5 | 4 |
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| Citation Flow (Majestic) | 20 | 22 |
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| Referring domains (Majestic) | 178 | 7 |
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Pismo
Chaptora