compare
osTicket vs OTOBO
The same facts for both, read from GitHub every night, and the relation a person reviewed.
| Fact | osTicket | OTOBO |
|---|---|---|
| Language | PHP | Perl |
| Licence | GPL-2.0 | GPL-3.0 |
| Stars | 4k | 336 |
| Latest | v1.18.4 | rel-11_0_18 |
| Last push | 2026-06-17 | 2026-10-06 |
| Release cadence | about 77 days between releases | too few releases |
| Active contributors | 0 commit authors on the default branch in the last 90 days | 17+ commit authors on the default branch in the last 90 days |
| Flags | none | none |
How they relate
Both replace Zendesk. Alternatives to Zendesk →
PartialosTicketEmail and web form tickets with SLAs and a knowledge base, without live chat or phone.
PartialOTOBOTickets from email, phone and a customer portal, with queues and SLAs.
osTicket
unsigned The latest release, v1.18.4, carries no signature GitHub could verify.
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OTOBO
unsigned The latest release, rel-11_0_18, carries no signature GitHub could verify.
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