Freedom251 › AI Book Writing Software
Calliope
by Calliope
What Calliope is
Calliope is a web-based tool for planning and drafting books. Writers can outline a book, work in a chapter workspace, and use continuity tools to keep manuscript details aligned. Finished work can be exported as Markdown, Google Docs, DOCX, EPUB, or PDF. The Free editor plan allows unlimited books. For AI allowance, Calliope lists one-time credit packs and subscriptions: a €10 pack adds a €10 balance, a €50 pack adds €55, and a €100 pack adds €120. The monthly subscription costs €12 per month and includes a €10 monthly AI allowance that resets every 30 days. The annual subscription costs €99 per year and also includes a €10 monthly AI allowance. The listed plan details describe book capacity, balances, and allowances; they do not specify other editor functions. Calliope is made by a company headquartered in Bratislava, Slovakia.
Who it suits
Calliope suits writers who want a web-based space to outline and draft books, organize chapters, and maintain continuity. Its export options are useful for writers who want to move manuscripts into common document and ebook formats.
What it does well
- Free editor allows unlimited books
- Includes book outlining and chapter workspace
- Provides continuity tools
- Exports to five listed formats
What to know first
- No rewrite controls are listed
- AI allowance requires a credit pack or subscription
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Free editor | Unlimited books · full editor · structure and goals · Map · marginalia · stats · DOCX/EPUB/PDF/Google Docs export | Free |
| €10 credit pack | one-time top-up · €10 AI balance · no auto-renewal | €10, paid once |
| €50 credit pack | one-time top-up · €55 AI balance · no auto-renewal | €50, paid once |
| €100 credit pack | one-time top-up · €120 AI balance · no auto-renewal | €100, paid once |
| Subscription monthly | monthly · €10 monthly Calliope AI allowance · MCP and Writer API write access | €12 a month |
| Subscription annual | annually · €10 monthly Calliope AI allowance · MCP and Writer API write access | €99 a year |
| Writing studio | Free · unlimited books · All editor features · unlimited books · DOCX, EPUB, PDF, Google Docs export | Free |
| AI credits | €10 → €10 of balance; €50 → €55 of balance; €100 → €120 of balance · One-time top-ups · no auto-renew · powers AI actions | On request |
The first 8 of 9 plans, as writecalliope.ink lists them, read 15 Oct 2026. The maker's own page has the final word. Every plan
Getting started
- Open the Calliope website in a web browser.
- Start with the free editor for unlimited books.
- Choose a one-time credit pack or subscription if you want a paid option.
- Export finished work as Markdown, Google Docs, DOCX, EPUB, or PDF.
Verdict
Calliope combines book planning, chapter drafting, continuity tools, and multiple export formats. Writers should distinguish the free editor from the separate paid AI credit and subscription options.
Questions
Is Calliope free?
Yes. The Free editor plan costs nothing and includes unlimited books.
What do the paid credit packs cost?
The €10 credit pack costs €10 once and provides a €10 balance. The €50 pack costs €50 once and provides €55; the €100 pack costs €100 once and provides €120.
How much are the subscriptions?
The monthly subscription costs €12 per month and includes a €10 monthly AI allowance. The annual subscription costs €99 per year and includes a €10 monthly AI allowance.
Which platforms does Calliope support?
Calliope is available on the web.
What formats can I export?
Exports include Markdown, Google Docs, DOCX, EPUB, and PDF.
Who makes Calliope?
Calliope is made by Calliope, headquartered in Bratislava, Slovakia.
Facts from Calliope's own pages
- AI boundary
- The product states that its AI does not write the author's prose. · writecalliope.ink, 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, 15 Oct 2026
- AI research
- The companion can search the web, read sources and answer with citations inside the writing margin. · writecalliope.ink, 15 Oct 2026
- Ambience
- An optional reactive backdrop changes as sentences are completed and can be left disabled. · writecalliope.ink, 15 Oct 2026
- API cost tiers
- API reads are free, AI operations consume credits or subscription allowance, and writes require the subscription. · writecalliope.ink, 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, 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, 12 Oct 2026
- Company registration
- The legal operator lists Staré Grunty 3546/7A, 841 04 Bratislava, Slovakia and company ID IČO 56249314. · writecalliope.ink, 15 Oct 2026
- Compliance
- The operator says it processes personal data in accordance with GDPR and applicable Slovak data protection law. · writecalliope.ink, 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, 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, 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, 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, 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, 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, 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, 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, 15 Oct 2026
- Free plan
- Yes · writecalliope.ink, 21 Sept 2026
- Headquarters
- Bratislava, Slovakia · writecalliope.ink, 28 Sept 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, 15 Oct 2026
- Integrations
- The MCP connector supports Claude, ChatGPT, and Cursor, and Calliope also documents a Writer API. · writecalliope.ink, 12 Oct 2026
- Licence and ownership
- The terms say Calliope software, design and trademarks are owned by the operator or licensors and protected by intellectual-property law; no open-source licence is offered. · writecalliope.ink, 15 Oct 2026
- Limit: metered AI
- AI chat, research, consistency checks, entity detection, synopsis generation and card suggestions consume credits or subscription allowance. · writecalliope.ink, 15 Oct 2026
- Limit: no prose generation
- Calliope intentionally does not draft, expand or rewrite prose, so writers seeking in-app generative rewriting are outside its design target. · writecalliope.ink, 15 Oct 2026
Where Calliope stands on Freedom251
- AI Book Writing Software#6 of 27
- Writing Apps#37 of 135