osTicket vs Znuny
A side-by-side comparison of two self-hosted helpdesk & ticketing options — licensing, setup difficulty, resource needs, and what each one replaces.
osTicket
Widely used open-source support ticket system
VS
Znuny
Community-maintained OTRS fork for service desks
| Feature | osTicket | Znuny |
|---|---|---|
| Deploy effort | Under-an-hour setup | Read-the-docs project |
| Health score | 81 · Excellent | 75 · Good |
| Category | Helpdesk & Ticketing | Helpdesk & Ticketing |
| License | GPL-2.0 | GPL-3.0 |
| Language | PHP | Perl |
| Setup difficulty | Medium | Hard |
| Min. RAM | 512 MB | 2,048 MB |
| Deployment | docker, bare-metal, source | bare-metal, source |
| GitHub stars | ★ 3,922 | ★ 596 |
| First released | 2003 | 2021 |
| Replaces | Zendesk, Freshdesk | ServiceNow, Zendesk |
What are osTicket and Znuny?
osTicket
osTicket is a widely used open-source support ticket system. It routes inquiries from email, web forms, and APIs into a simple, easy-to-use multi-user interface.
- Email and web ticket creation
- Custom fields and forms
- SLA and ticket routing
- Canned responses
Znuny
Znuny is an open-source ticketing system and service desk maintained as a free fork of OTRS Community Edition. It supports helpdesk and ITSM workflows.
- Maintained OTRS fork
- Helpdesk and ITSM
- Customizable workflows
- Active community support
osTicket vs Znuny: key differences
OsTicket is written in PHP, while Znuny is built with Perl. Licensing differs — GPL-2.0 for osTicket versus GPL-3.0 for Znuny. OsTicket is the lighter option, starting around 512 MB of RAM against 2,048 MB for Znuny. OsTicket is the more established project (first released 2003), while Znuny arrived in 2021. OsTicket has the considerably larger community, at 3,922 GitHub stars versus 596. OsTicket lists first-class Docker deployment; Znuny does not.
Why pick each one
Choose osTicket if…
- Mature and stable
- Easy for staff to learn
Watch out for
- Interface looks dated
Frequently asked questions
Is osTicket or Znuny better?
osTicket is the stronger all-round pick: it has both the larger community and the simpler medium setup. Consider Znuny if its specific feature set fits your needs better.
Are osTicket and Znuny free and open-source?
Yes. osTicket is licensed under GPL-2.0 and Znuny under GPL-3.0. Both can be self-hosted at no software cost.
Can I run osTicket and Znuny with Docker?
osTicket: yes. Znuny: check the project docs for container support.
Which is lighter on resources, osTicket or Znuny?
osTicket has the smaller minimum footprint at 512 MB of RAM, compared to about 2,048 MB for Znuny. Real-world usage depends on library size, user count, and enabled features.