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Zendesk vs osTicket: catalog facts
Zendesk	osTicket
Paid Paid subscription service with a free trial.	Free Free to download and self-host; a separate paid hosted version is offered.
Web	Web, Self-hosted
Tickets from many channels in one queue Covers both customer support and internal employee service	Mature and widely used Self-hosted, keeping ticket data in house
Proprietary hosted service with data stored by Zendesk Heavy focus on AI features that may not suit every team	You install, update and secure the server yourself Website promotes a separate paid hosted product
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.