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Calliope
Calliope · Bratislava, Slovakia
What it is
Calliope is a manuscript studio for novelists who want support with research, organization, and consistency while keeping the prose their own. Its AI companion searches the web, reads sources, and provides cited answers in the page margin. The editor organizes a manuscript into parts and chapters, with synopses, statuses, goals, and deadlines, and shows live word, page, and print estimates. Ten craft lenses call attention to habits such as adverb use, filter words, sentence rhythm, sensory balance, and repeated echoes without rewriting the text. Calliope exports to DOCX, EPUB, PDF, and Google Docs, and also lists Markdown as an export format. It is available on the web and through an API. The free editor supports unlimited books; paid options include one-time AI credit packs and subscriptions. Its MCP connector can read a manuscript for free; subscription write access can change structure, annotations, and the Map, but not author prose. Without an account, writing stays in the browser; a free account saves it to Calliope.
For and against
For
- Free editor supports unlimited books.
- Research answers include citations in the page margin.
- Ten craft lenses flag writing habits without rewriting.
- Exports include DOCX, EPUB, PDF, and Google Docs.
- AI can organize structure but not write prose.
Against
- No free trial is offered.
- Local project-file open and save is forthcoming.
- AI processing may involve third-party subprocessors.
- MCP write access requires a subscription.
The verdict
Calliope combines manuscript planning, cited research, and craft review while leaving prose writing to the author. Its free editor allows unlimited books, while access to AI actions is handled through credit packs or subscriptions.
Who it suits
Calliope suits novelists who want help with research and manuscript organization without having AI write their prose. Its craft lenses and consistency tools may also suit writers who want to review patterns across a manuscript.
Plans and prices
Free editor
Unlimited books · full editor · structure and goals · Map
Read 15 Oct 2026 · writecalliope.ink
€10 credit pack
€10 AI balance · no auto-renewal
Read 15 Oct 2026 · writecalliope.ink
€50 credit pack
€55 AI balance · no auto-renewal
Read 15 Oct 2026 · writecalliope.ink
€100 credit pack
€120 AI balance · no auto-renewal
Read 15 Oct 2026 · writecalliope.ink
Subscription monthly
€10 monthly Calliope AI allowance · MCP and Writer API write access
Read 15 Oct 2026 · writecalliope.ink
Subscription annual
€10 monthly Calliope AI allowance · MCP and Writer API write access
Read 15 Oct 2026 · writecalliope.ink
Writing studio
All editor features · unlimited books · DOCX, EPUB, PDF, Google Docs export
Read 12 Oct 2026 · writecalliope.ink
AI credits
One-time top-ups · no auto-renew · powers AI actions
Read 12 Oct 2026 · writecalliope.ink
Write with your own AI
MCP and Writer API write access · €10/month AI allowance · without subscription, MCP is read-only
Read 12 Oct 2026 · writecalliope.ink
On the record
- AI boundary
- The product states that its AI does not write the author's prose.writecalliope.ink · read 12 Oct 2026
- AI memory
- Book memory carries author-approved corrections, voice-and-craft rules and glossary entries into later conversations and passes.writecalliope.ink · read 15 Oct 2026
- AI research
- The companion can search the web, read sources and answer with citations inside the writing margin.writecalliope.ink · read 15 Oct 2026
- Ambience
- An optional reactive backdrop changes as sentences are completed and can be left disabled.writecalliope.ink · read 15 Oct 2026
- API cost tiers
- API reads are free, AI operations consume credits or subscription allowance, and writes require the subscription.writecalliope.ink · read 15 Oct 2026
- API write capability
- The Writer API can persist prose supplied by a user's script, but it has no prose-generation endpoint and requires a subscription for write operations.writecalliope.ink · read 15 Oct 2026
- Audience
- The maker describes Calliope as intended for authors who want AI help with thinking and organisation while writing their own book.writecalliope.ink · read 12 Oct 2026
- Company registration
- The legal operator lists Staré Grunty 3546/7A, 841 04 Bratislava, Slovakia and company ID IČO 56249314.writecalliope.ink · read 15 Oct 2026
- Compliance
- The operator says it processes personal data in accordance with GDPR and applicable Slovak data protection law.writecalliope.ink · read 12 Oct 2026
- Connector limit
- MCP can read the manuscript for free, while subscription write access can edit structure, annotations, and the Map but cannot write prose.writecalliope.ink · read 12 Oct 2026
- Consistency checking
- Consistency checks compare prose with the Map using deterministic name-drift detection and an AI contradiction pass, leaving findings as reviewable notes.writecalliope.ink · read 15 Oct 2026
- Craft lenses
- Ten visual craft lenses expose patterns such as adverbs, filter words, sentence rhythm, sensory balance and echoes without rewriting text.writecalliope.ink · read 15 Oct 2026
- Craft tools
- Ten craft lenses highlight writing habits such as adverbs, filter words, sentence rhythm, sensory balance, and echoes without rewriting the text.writecalliope.ink · read 12 Oct 2026
- Documentation depth
- Documentation covers the app, writing canvas, structure, goals, Map, marginalia, AI companion, exports, billing, MCP and Writer API endpoint conventions.writecalliope.ink · read 15 Oct 2026
- Entity detection
- AI entity detection proposes characters and places found in a chapter for the author to accept or reject.writecalliope.ink · read 15 Oct 2026
- Exports
- Finished books can be exported to Markdown, Google Docs, DOCX, EPUB and typeset PDF; Markdown works without an account.writecalliope.ink · read 15 Oct 2026
- Founder
- The About page identifies Martin Rapavý as Calliope's founder and says he began building it to get editorial and memory help rather than ghostwriting.writecalliope.ink · read 15 Oct 2026
- Independent listing
- SaaSHub describes Calliope.ink as a Slovakia-based web and browser application and lists it as freemium with €10 AI credits.saashub.com · read 15 Oct 2026
