Compare software

Kotobee Author vs Asciidoctor EPUB3: catalog facts
Kotobee Author	Asciidoctor EPUB3
Freemium Free license and a 30-day trial are available, with paid plans for more features.	Free Free to download and use; the source is published on GitHub.
Windows, macOS, Linux	Command line
Exports to EPUB, HTML5, desktop and mobile apps SCORM and LTI export for learning management systems	Converts AsciiDoc straight to EPUB3 Works within the existing Asciidoctor toolchain
Advanced publishing and distribution features sit in paid plans Aimed at publishers and educators, more than a simple ebook converter needs	Command-line only, needs a Ruby setup Only useful if your source text is in AsciiDoc
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.