Calliope
8.0#19 in writing appsFrom €99 a yearFree planWebAPI
VisitCalliope vs Quillstone
Quillstone
6.7#14 in ai book writing software$89 one-timeFree planiOSmacOS
VisitWhat both publish
| Fact | Calliope | Quillstone |
|---|---|---|
| Privacy | The privacy policy says Rhymenoceros is a GDPR controller, uses hosting, AI-model, analytics and payment subprocessors, does not sell content or build advertising profiles, and supports deletion requests. | The Mac app is offline by default, has no analytics or telemetry, and sends selected text directly to a chosen cloud provider only when the user enables it. |
| Purpose | Calliope is a manuscript studio for novelists, with AI for research, canon memory, and consistency checking. | Quillstone combines research, drafting, fact-checking, audiobook creation, cover design, and book publishing exports for journalists and nonfiction authors. |
Calliope plans
- Free editorFree
- €10 credit pack€10, paid once
- €50 credit pack€50, paid once
- €100 credit pack€100, paid once
- Subscription monthly€12 a month
- Subscription annual€99 a year
Quillstone plans
- Quillstone FreeFree
- Quillstone Pro$89, paid once
Pick Calliope if…
Calliope may suit book writers who want outlining, chapter organization, and continuity tools in a web editor. Its free plan is relevant to writers working on unlimited books.
Pick Quillstone if…
Quillstone suits journalists and nonfiction writers working on reporting, biography, history, manuals, textbooks, essays, or research-led books. It is for users with an Apple Silicon Mac running macOS 15 or newer.