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Antenna House Formatter vs Gotenberg: catalog facts
Antenna House Formatter	Gotenberg
Paid Commercial licences with paid maintenance; a trial download is available.	Free Free and open source under the MIT licence.
Linux	Self-hosted
Supports both XSL-FO and CSS for Paged Media Long development history with regular releases	Chromium and LibreOffice bundled in one container Converts 100+ office formats as well as HTML and Markdown
Paid commercial licence Aimed at automated publishing rather than editing existing PDFs	API only, with no graphical interface Requires Docker and some developer knowledge
Downloadable app	Self-hosted
Closed source	Open source
License: Proprietary	License: MIT
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 October 2, 2026	Official website Full listing and sources Checked September 24, 2026

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