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Zammad vs Hesk: catalog facts
Zammad	Hesk
Free The self-hosted community edition is free; hosted plans are sold separately.	Freemium Free to download and self-host, with paid licenses and flat-fee cloud plans.
Linux, Web, Self-hosted	Web, Self-hosted
Packages for Debian, Ubuntu and CentOS plus Docker Actively released	Simple to install on a standard PHP server Built-in knowledge base for self-help
Server runs on Linux only Heavier to set up than simple PHP help desks	Not open source Some options require paid licenses or the cloud plan
Self-hosted	Self-hosted, Hosted service
Open source	Closed 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.