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Zammad vs Zendesk: catalog facts
Zammad	Zendesk
Free The self-hosted community edition is free; hosted plans are sold separately.	Paid Paid subscription service with a free trial.
Linux, Web, Self-hosted	Web
Packages for Debian, Ubuntu and CentOS plus Docker Actively released	Tickets from many channels in one queue Covers both customer support and internal employee service
Server runs on Linux only Heavier to set up than simple PHP help desks	Proprietary hosted service with data stored by Zendesk Heavy focus on AI features that may not suit every team
Self-hosted	Hosted service
Open source	Closed source
License not stated	License not stated
Not stated if an account is needed	Account needed
Not stated if it works offline	Needs internet
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.