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OTOBO vs Znuny: catalog facts
OTOBO	Znuny
Free Open source with no licence fees.	Free Free open-source software; professional services are offered separately.
Web, Self-hosted	Web, Self-hosted
No licence costs ITSM processes based on ITIL practices	Direct continuation of OTRS Community Edition Long-term support branch alongside a feature branch
You have to host and maintain the server yourself Website content is mainly in German	Self-hosting requires server setup and maintenance Aimed at organizations rather than individuals
Self-hosted	Self-hosted
Open 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 24, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.