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Gotenberg vs Antenna House Formatter: catalog facts
Gotenberg	Antenna House Formatter
Free Free and open source under the MIT licence.	Paid Commercial licences with paid maintenance; a trial download is available.
Self-hosted	Linux
Chromium and LibreOffice bundled in one container Converts 100+ office formats as well as HTML and Markdown	Supports both XSL-FO and CSS for Paged Media Long development history with regular releases
API only, with no graphical interface Requires Docker and some developer knowledge	Paid commercial licence Aimed at automated publishing rather than editing existing PDFs
Self-hosted	Downloadable app
Open source	Closed source
License: MIT	License: Proprietary
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 2, 2026

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