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Zendesk vs Znuny: catalog facts
Zendesk	Znuny
Paid Paid subscription service with a free trial.	Free Free open-source software; professional services are offered separately.
Web	Web, Self-hosted
Tickets from many channels in one queue Covers both customer support and internal employee service	Direct continuation of OTRS Community Edition Long-term support branch alongside a feature branch
Proprietary hosted service with data stored by Zendesk Heavy focus on AI features that may not suit every team	Self-hosting requires server setup and maintenance Aimed at organizations rather than individuals
Hosted service	Self-hosted
Closed source	Open source
License not stated	License not stated
Account needed	Not stated if an account is needed
Needs internet	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.