Chaptora vs Open Atelier

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Chaptora compared with Open Atelier
Detail	Chaptora	Open Atelier
What it does	Context-aware AI book editor for authors	A writing teacher that reads your book: see what to work on in your chapters, learn why, and check your fix.
Stage	Not given	Not given
Founded	Not given	Not given
Based in	AT	Not given
Pricing model	Freemium	Freemium
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).	Free plan includes the editor, rule-based chapter check, and lessons with 3 Coach reads, 20 Co-write requests, and 10 questions per month. Atelier plan: $21/month or $189/year (with 3 months free annually) includes 40 Coach reads, 250 Co-write requests, and 150 questions per month. Additional packs:
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	Rule-based chapter check for dialogue, continuity, point of view, prose and scene habits Findings anchored to your text with linked lessons Exercises on your own passage with re-check Three modes: Human only, Coach, or Co-write Authorship record tracking sources: typed, pasted, imported, or AI-generated Story bible for characters, places and facts over time Import from Word, PDF, Scrivener and other formats Version history for each chapter Export to Word, EPUB, PDF, Markdown and plain text Claude Sonnet 5.5 from Anthropic for AI features
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	Your writing is never used to train AI models Transparent authorship record shows exactly how each sentence arrived AI is optional and controlled per manuscript, with rule-based checks available free Interactive feedback loop with practice exercises before re-checking No API keys or token counting; simple per-action pricing
Community votes	0	0
DR (Domain Rating by Ahrefs)	2 no change since last check	18 no change since last check
Trust Flow (Majestic)	4	0
Citation Flow (Majestic)	22	19
Referring domains (Majestic)	7	6

5 details filled in for both companies.

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