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Zammad vs iTop: catalog facts
Zammad	iTop
Free The self-hosted community edition is free; hosted plans are sold separately.	Free Free and open source, with commercial offerings from Combodo.
Linux, Web, Self-hosted	Web, Self-hosted
Packages for Debian, Ubuntu and CentOS plus Docker Actively released	Combines ITSM ticketing with a CMDB Low-code customisation for different organisations
Server runs on Linux only Heavier to set up than simple PHP help desks	Setup and data modelling take effort Needs your own server to host
Self-hosted	Self-hosted
Open source	Open source
License not stated	License: AGPL-3.0
Not stated if an account is needed	No account 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.