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).
Key features
GEO scoring and tracking
AI search tracking
Content optimization
Site auditor
Bulk product description generation
Data enrichment
Brand voice rules
MyVoice personalization
Multi-channel writing
Chrome extension
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
What makes it different
Three integrated platforms forming a reinforcing cycle for content performance
Specialized platforms rather than all-in-one tools
Focus on Generative Engine Optimization alongside traditional SEO
AI that amplifies your voice rather than replacing it
Trusted by 30,000+ content teams at major companies
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
Copysmith
Chaptora