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Zammad vs Trudesk: catalog facts
Zammad	Trudesk
Free The self-hosted community edition is free; hosted plans are sold separately.	Free Free to use, with the source available on GitHub.
Linux, Web, Self-hosted	Web, Self-hosted
Packages for Debian, Ubuntu and CentOS plus Docker Actively released	Real-time ticket updates and notifications Built-in chat between agents and customers
Server runs on Linux only Heavier to set up than simple PHP help desks	Requires running and maintaining your own server when self-hosted Smaller project than older help desks such as osTicket
Self-hosted	Self-hosted, Hosted service
Open source	Open source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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