Free trial
No trial is needed because the editor itself is free and opens without an account. The metered AI features are the paid portion, and their trial terms are not stated on the homepage.
Learn moreCalliope
A novel editor with an AI that researches and remembers, but never writes your prose
Beginner API
What is Calliope?
Calliope is a distraction-free novel editor with an AI companion in the margin. It researches with citations, holds your story canon, flags continuity drift, and overlays craft lenses on your prose, but never writes a sentence for you. The editor is free and needs no account; only the AI is metered.
Calliope is a manuscript studio for novelists, split into two parts with a single rule running through both: the AI never drafts your prose. The free writing layer is a distraction-free canvas set in real book typography on warm paper, with focus mode, typewriter scroll, and a structure of your own making. Around it sits a metered AI that handles everything adjacent to the writing rather than the writing itself. The AI works in the margin as a companion. You can ask it a question mid-sentence and it searches the web, reads the sources it finds, and answers with citations. The Map stores your characters, places, and established facts as a canon, then flags places where your own finished prose has drifted from that record. A consistency check quotes your actual text rather than paraphrasing it, so you see exactly where a detail contradicts something you wrote earlier. Ten craft lenses overlay adverbs, filter words, sentence rhythm, and echoes directly onto the page, showing habits without touching a sentence. Beyond the editor, statistics give the shape of the work back: a year heatmap, a streak that survives a rest day, a writing persona, and a shareable Writing Wrapped. Finished manuscripts export to DOCX, EPUB, PDF, or a Google Doc in one click, with no AI involved in the output. For writers who already run their own models, an MCP connector lets Claude, ChatGPT, or Cursor read the whole book and tend the canon, with the refusal to touch prose enforced at the protocol level. The audience is fiction writers who want help thinking, organising, and checking rather than generating. It sits opposite Sudowrite and similar drafting tools, and closer to Scrivener or Novelcrafter in spirit while keeping AI firmly out of the sentence. No account is needed to start, and your words stay on your device until you choose to keep them.
How do you use Calliope?
1Open the editor without an account
Go to the launch page and the editor opens straight away. There is no sign-up wizard and no card; your words live on your device until you decide to keep them.2Set up your manuscript and structure
Lay out your book's structure and start writing in the book-style canvas. Focus mode and typewriter scroll keep the page in view.3Build your story canon in the Map
Record characters, places, and fixed facts in the Map so later consistency checks have something concrete to measure your prose against.4Ask the companion to research or check consistency
Pose a question in the margin and the companion searches the web and answers with citations, or run a consistency pass that quotes your own text where it drifts.5Review your habits with the craft lenses
Switch on the lenses to wash adverbs, filter words, rhythm, and echoes onto the page, then decide yourself what to keep or cut.6Export the finished manuscript
When the draft is done, export to DOCX, EPUB, PDF, or a Google Doc in one click. No AI touches the exported file.
Pros and cons
Pros
- The no-ghostwriting rule is structural rather than advisory, holding even for connected AI agents over MCPAI
- Free editor with no account, no card, and no setup, so writing can start immediatelyAI
- Research answers arrive with citations in the margin, alongside the sentence you are working onAI
- Canon tracking plus drift detection compares your finished prose against your own established factsAI
- Craft lenses surface adverbs, filter words, rhythm, and echoes as an overlay without rewriting anythingAI
Cons
- The AI is metered while the editor is free, so heavier use of research and consistency checking adds costAI
- Continuity checking depends on a maintained Map, which means ongoing manual bookkeeping as the book growsAI
- Writers hoping for scene drafting, brainstorming prompts, or prose suggestions will find nothing here by designAI
- No pricing figures or plan tiers are published on the homepage, so costs need checking before committingAI
- Support channels and documentation depth are not described on the siteAI
How much does Calliope cost?
Pricing
The writing studio is free and unlimited, with no account or card required to start. The AI layer around it is metered and is the only part you pay for. Specific prices, plan tiers, and usage limits are not published on the homepage.
Learn moreIntegrations
An MCP connector lets external AI clients such as Claude, ChatGPT, or Cursor read your manuscript and tend your canon, with the refusal to write prose enforced at the protocol level. Export covers DOCX, EPUB, PDF, and Google Docs.
Learn moreFeatures
Distraction-free book-typography editor with focus mode and typewriter scroll, a story Map for characters and canon, consistency checking that quotes your own prose, web research with citations in the margin, ten craft lenses for adverbs, filter words, rhythm and echoes, writing stats with heatmap and streak, and one-click export to DOCX, EPUB, PDF, or Google Docs.
Learn moreFrequently asked questions about Calliope
How much does Calliope cost?
The writing studio is free and unlimited, with no account or card required to start. The AI layer around it is metered and is the only part you pay for. Specific prices, plan tiers, and usage limits are not published on the homepage.Does Calliope offer a free trial?
No trial is needed because the editor itself is free and opens without an account. The metered AI features are the paid portion, and their trial terms are not stated on the homepage.Does Calliope have an API?
Yes, Calliope offers an API.How do you use Calliope?
The walkthrough on this page covers 6 steps: 1. Open the editor without an account 2. Set up your manuscript and structure 3. Build your story canon in the Map 4. Ask the companion to research or check consistency 5. Review your habits with the craft lenses 6. Export the finished manuscript.What platforms does Calliope support?
Calliope is available on Web App.What does Calliope integrate with?
An MCP connector lets external AI clients such as Claude, ChatGPT, or Cursor read your manuscript and tend your canon, with the refusal to write prose enforced at the protocol level. Export covers DOCX, EPUB, PDF, and Google Docs.
Status
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Added10/21/2026
Platforms
Web App
Pricing
FreemiumFree
