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OTOBO vs Zendesk: catalog facts
OTOBO	Zendesk
Free Open source with no licence fees.	Paid Paid subscription service with a free trial.
Web, Self-hosted	Web
No licence costs ITSM processes based on ITIL practices	Tickets from many channels in one queue Covers both customer support and internal employee service
You have to host and maintain the server yourself Website content is mainly in German	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 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.