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