Zammad
Agent-Ticketansicht
Compare open-source ticketing systems
Compare technical foundations, versions, security, community, ecosystem, and features. Criteria are shown individually and are not rolled into an overall score.
System selection
Select up to 5 systems to compare
Facts side by side
The table is generated from Open ITSM Hub system and version data. Scroll horizontally on small screens to see every system.
| Property | Zammad | Znuny | OTOBO | O-Fork | OTRS Community Edition |
|---|---|---|---|---|---|
| Stack | |||||
| Primary Language | Ruby | Perl | Perl | Perl | Perl |
| Language Breakdown | 93.5, 3.8, 2.1 | ||||
| Frameworks | Ruby on Rails, Vue.js | Znuny framework | OTOBO framework | OFORK framework | OTRS framework |
| Web Servers | Nginx | Apache with mod_perl | Nginx, Apache with mod_perl, Gazelle | Apache with mod_perl | Apache with mod_perl |
| Operating Systems | Linux | Linux | Linux | Linux | Linux |
| Databases | PostgreSQL | MySQL, MariaDB, PostgreSQL, Oracle | MySQL, MariaDB, PostgreSQL | MySQL (< 8.0), MariaDB, PostgreSQL >= 9.2, Oracle >= 10g | MySQL, MariaDB, PostgreSQL, Oracle |
| Search | Elasticsearch (optional, strongly recommended) | Database full-text search | Elasticsearch | — | Database full-text search |
| Cache | Redis 6+ for realtime communication, Memcached for container or clustered deployments | File system, Redis | Redis, File system | — | File system |
| Versions | |||||
| Current version | 7.1.1 | 7.3.5 | 11.1 | 12.0.3 | 6.0.41 |
| Latest Release Date | 2026-06-25 | 2026-07-22 | 2026-06-24 | 2026-06-26 | 2024-12-09 |
| Supported Branches | 7.1, 7.0 | 7.3, 6.5 LTS | 11.1, 11.0, 10.1 | 12.0 | 6.0 |
| Lts Available | — | Yes | — | — | — |
| Release Notes Url | Open source | Open source | Open source | Open source | Open source |
| Security | |||||
| Security Policy Url | Open source | Open source | Open source | — | Open source |
| Advisories Url | Open source | Open source | Open source | Open source | Open source |
| Security Contact | security@zammad.com | — | — | — | — |
| Signed Releases | — | — | — | — | — |
| Sbom Available | — | — | — | — | — |
| Update Policy | Publishes numbered Zammad security advisories and coordinated security releases. | Security advisories are published by the project and fixes are delivered in maintained release lines. | Security reports and advisories are handled through the public GitHub security area. | — | Centuran maintains its continuation independently; it must not be confused with the discontinued vendor CE or commercial OTRS. |
| Recent Updates | Security releases 7.1.1 and 7.0.3 published on 2026-06-25 | 7.3.5 published on 2026-07-22 with security-related dependency updates | — | — | — |
| Community | |||||
| GitHub stars | 5800 | 582 | 331 | 4 | 61 |
| GitHub forks | 1000 | 119 | 89 | 1 | 13 |
| GitHub issues | Open source | Open source | Open source | Open source | Open source |
| Open issues | 435 | 62 | 194 | 0 | 22 |
| New issues (90 days) | 136 | 32 | 194 | 0 | 1 |
| Closed issues (90 days) | 146 | 21 | 208 | 0 | 0 |
| Issue window since | 2026-05-01 | 2026-05-01 | 2026-05-01 | 2026-05-01 | 2026-05-01 |
| Governance | Vendor-led open-source development | Vendor-led open-source development | Vendor-led open-source development | Project-maintainer-led open-source development | Centuran-maintained community continuation |
| Commercial Backer | Zammad GmbH | Znuny GmbH | Rother OSS GmbH | — | Centuran Consulting |
| Project forum | Open source | Open source | Open source | Open source | — |
| Forum activity | Very active; new posts and replies within a few hours | Very active; visible daily help and discussion posts | Active; visible posts on the same day, especially in the German-language forum | New forum with initial support topics and low activity | No dedicated official project forum found; discussions take place via GitHub Issues |
| Latest forum activity | 2026-07-30 | 2026-07-29 | 2026-07-30 | 2026-05-14 | — |
| Documentation Url | Open source | Open source | Open source | Open source | Open source |
| Contribution Url | Open source | Open source | Open source | Open source | Open source |
| Ecosystem | |||||
| Package format | .szpm | .opm | .opm | .opm | .opm |
| Package Repository Url | — | Open source | Open source | — | — |
| Migration Paths | OTRS, Zendesk, Freshdesk | OTRS Community Edition, Earlier Znuny releases | OTRS Community Edition, Earlier OTOBO releases | OTRS-family systems | Original OTRS Community Edition |
| Integration Interfaces | REST API, Webhooks, Email, CTI | Generic Interface, REST, SOAP, Email | Generic Interface, REST, SOAP, Email | Email, Web services | Generic Interface, REST, SOAP, Email |
| Features | |||||
| Built In | Ticketing, Knowledge base, REST API, GraphQL, Webhooks, Full-text search, Time accounting, SAML SSO, OpenID Connect, AI ticket summaries | Ticketing, Process management, Generic Interface, Service catalog, Time accounting | Ticketing, Process management, Generic Interface, Elasticsearch search, OAuth, OpenID Connect, AI assistance (beta) | Ticketing, Agent and customer interfaces, Package management | Ticketing, Process management, Generic Interface, Service management |
| Available Via Addon | — | Additional ITSM and integration packages | Additional ITSM and integration packages | .opm packages | Legacy OTRS Community Edition packages, subject to compatibility |
| Unsupported | — | — | — | — | — |
| Unknown | CMDB depth, Native Kubernetes operator | Native Kubernetes operator | Native Kubernetes operator | Elasticsearch integration, Redis integration, Native container support, Native Kubernetes operator | Current package compatibility coverage, Native container support, Native Kubernetes operator |
Feature and integration matrix
| Funktion | Zammad | Znuny | OTOBO | O-Fork | OTRS Community Edition |
|---|---|---|---|---|---|
| Ticketing | Integriert | Integriert | Integriert | Integriert | Integriert |
| Knowledge Base | Integriert | — | — | — | — |
| REST API | Integriert | — | — | — | — |
| GraphQL | Integriert | — | — | — | — |
| Webhooks | Integriert | — | — | — | — |
| Full-Text Search | Integriert | — | — | — | — |
| Time Accounting | Integriert | Integriert | — | — | — |
| SAML SSO | Integriert | — | — | — | — |
| OpenID Connect | Integriert | — | Integriert | — | — |
| AI Ticket Summaries | Integriert | — | — | — | — |
| Process Management | — | Integriert | Integriert | — | Integriert |
| Generic Interface | — | Integriert | Integriert | — | Integriert |
| Service Catalog | — | Integriert | — | — | — |
| Additional ITSM And Integration Packages | — | Per Add-on | Per Add-on | — | — |
| Elasticsearch Search | — | — | Integriert | — | — |
| OAuth | — | — | Integriert | — | — |
| AI Assistance (Beta) | — | — | Integriert | — | — |
| Agent And Customer Interfaces | — | — | — | Integriert | — |
| Package Management | — | — | — | Integriert | — |
| .Opm Packages | — | — | — | Per Add-on | — |
| Service Management | — | — | — | — | Integriert |
| Legacy OTRS Community Edition Packages, Subject To Compatibility | — | — | — | — | Per Add-on |
Interfaces side by side
The same scene per system when a screenshot exists. Missing scenes stay empty on purpose.
Znuny
Agent-Ticketansicht
OTOBO
Agent-Ticketansicht
kein Screenshot
O-Fork
Agent-Ticketansicht
kein Screenshot
OTRS Community Edition
Agent-Ticketansicht
kein Screenshot
Voices from operations
Curated quotes from administrators. No stars, no overall score.
Zammad
„Zammad is a remarkable exception here. A fresh, well-thought-out design, continuous development, and Zammad even comes from Berlin.“
Zammad
„Of course, not everything is perfect and we could not adopt all of our workflows established in our old OTRS system on a 1:1 basis. We were forced to rethink everything from scratch, and I think it was worth it.“
Znuny
„After logging in with our existing credentials, we recognized the familiar dashboard user interface. Only the large Znuny logo (top right) shows a visual difference compared to the old OTRS CE installation. And most importantly: All our tickets (open and closed) exist, reports are still working and new ticket creation through e-mail works.“
GitHub issues and forum activity
Public activity in the main repositories and official project forums, as of 2026-07-30.
Issue-Zahlen zeigen sichtbare Entwicklungsaktivität, aber keine Produktqualität. Automatisierte Issues und unterschiedliche Arbeitsweisen der Projekte können die Werte verzerren.
Zammad
GitHub-Fenster ab 01.05.2026
- Offen
- 435
- Neu / 90 T.
- 136
- Geschl. / 90 T.
- 146
Forum
Very active; new posts and replies within a few hours
Letzte sichtbare Aktivität: 30.07.2026
Znuny
GitHub-Fenster ab 01.05.2026
- Offen
- 62
- Neu / 90 T.
- 32
- Geschl. / 90 T.
- 21
Forum
Very active; visible daily help and discussion posts
Letzte sichtbare Aktivität: 29.07.2026
OTOBO
GitHub-Fenster ab 01.05.2026
- Offen
- 194
- Neu / 90 T.
- 194
- Geschl. / 90 T.
- 208
Forum
Active; visible posts on the same day, especially in the German-language forum
Letzte sichtbare Aktivität: 30.07.2026
O-Fork
GitHub-Fenster ab 01.05.2026
- Offen
- 0
- Neu / 90 T.
- 0
- Geschl. / 90 T.
- 0
Forum
New forum with initial support topics and low activity
Letzte sichtbare Aktivität: 14.05.2026
OTRS Community Edition
GitHub-Fenster ab 01.05.2026
- Offen
- 22
- Neu / 90 T.
- 1
- Geschl. / 90 T.
- 0
Forum
No dedicated official project forum found; discussions take place via GitHub Issues
Community and ecosystem in numbers
Stand: 2026-07-30
Einzelmetriken, keine Gesamtwertung
GitHub stars
Public stars of each main repository.
- Zammad5.800
- Znuny582
- OTOBO331
- O-Fork4
- OTRS Community Edition61
Packages in Open ITSM Hub
Compatible packages currently listed in the hub.
- Zammad59
- Znuny132
- OTOBO56
- O-Fork0
- OTRS Community Edition131
Year of first public release
Timeline context; longer bars mean a later release.
- Zammad2017
- Znuny2021
- OTOBO2020
- O-Fork2025
- OTRS Community Edition2001
Projekt-Abstammung
Vereinfachte historische Einordnung der Codebasen, keine Produktwertung.
- OTRS Community Edition ist die gemeinsame Grundlage von Znuny, OTOBO, Ofork und KIX.
- Zammad ist eine eigenständige Entwicklung ohne OTRS-Abstammung.
In-depth comparisons
Editorial guides for specific selection questions.
KIX vs OTOBO: Asset ITSM vs Docker OTRS Fork
Comparing KIX 18 and OTOBO: A rewrite with integrated CMDB versus an OTRS fork featuring Docker, Elasticsearch, Redis, and .opm packages.
Read comparisonKIX vs Zammad: Technical ITSM or Modern Helpdesk?
Comparing KIX 18 and Zammad: CMDB and technical service management versus a Ruby on Rails multi-channel helpdesk.
Read comparisonKIX vs Znuny: CMDB Platform or Classic OTRS Successor?
KIX and Znuny compared for IT admins: CMDB and KIX 18 vs. OTRS-leaning LAMP architecture, LTS, and the .opm ecosystem.
Read comparisonOFORK vs OTRS Community Edition: What Does the New Fork Change?
Detailed comparison between O-Fork and OTRS Community Edition: Learn everything about codebase, AGPL licensing, and technical risks for IT managers.
Read comparisonOTOBO vs OFORK: Docker Platform or Classic OTRS Fork?
OTOBO vs OFORK: A technical comparison for IT decision-makers regarding deployment (Docker vs classic), search (Elasticsearch), and AI features.
Read comparisonOTOBO vs Znuny 2026: Which OTRS Fork Fits Best?
Comparison of OTOBO and Znuny for IT decision-makers: focus on Docker operations, Elasticsearch integration, LTS strategies, and package compatibility.
Read comparisonOTOBO vs. OTRS Community Edition: Modernizing Without Starting Over?
Comparison of OTOBO and OTRS Community Edition for IT decision-makers: Focusing on container deployment, Elasticsearch search, and release strategies for 2026.
Read comparisonOTRS Forks and Zammad Compared: Five Systems for 2026
Vendor-neutral comparison of OTRS forks (Znuny, OTOBO, O-Fork, OTRS-CE) and Zammad for 2026. Analysis of architecture, security, and operations.
Read comparisonZammad vs OFORK: Two Paths to an Open Ticketing System
Zammad vs OFORK: A comparison between a modern Ruby helpdesk and a Perl-based OTRS fork regarding maturity, technology, and community structure.
Read comparisonZammad vs OTOBO: Modern Helpdesk or OTRS Fork?
Zammad vs OTOBO: Technical comparison for 2026. Discover the differences between Ruby on Rails architecture and the modernized, Perl-based OTRS fork.
Read comparisonZammad vs OTRS Community Edition: Migration or Continued Operations?
Zammad vs. OTRS Community Edition compared: Learn everything about architecture, migration paths, and the differences between Ruby and Perl stacks.
Read comparisonZammad vs Znuny: Helpdesk UX or Classic ITSM?
Zammad vs Znuny: A comparison of user experience, multi-channel support, and ITSM process depth for IT management and administrators.
Read comparisonZnuny vs OFORK: Established OTRS Successor or New Fork?
Comparison of Znuny and OFORK: Analysis of governance, maintainability, and community trust for IT decision-makers based on the OTRS Community Edition.
Read comparisonZnuny vs OTRS Community Edition: Differences and Migration Path
Comparison of Znuny and OTRS Community Edition: Learn all about migration paths, security updates, and the technological evolution of these forks.
Read comparisonOTRS forks and successors 2026
Place OTOBO, Znuny, and KIX, and prepare an OTRS migration systematically.
Open-source ticketing systems
Choose helpdesk and ITSM systems by license, architecture, operations, and ecosystem.