Zammad
Easy to use but powerful support and ticketing system.
Self-hosted Ticketing software
Helpdesk, bug and issue tracking software to help the tracking of user requests, bugs and missing features.
23 apps, ranked by GitHub stars weighted by maintenance health.
FreeScout
Email-based customer support application, help desk and shared mailbox (alternative to Zendesk and Help Scout).
Erxes
Marketing, sales, and customer service platform designed to help businesses attract more engaged customers.
Frappe Helpdesk
Helpdesk software which helps you streamline your company's support, offers an easy setup, clean user interface, and automation tools to resolve customer queries efficiently.
Libredesk
Modern omnichannel customer support desk. Live chat, email, and more in a single binary.
Bugsink
Real-time error tracking for your applications with all the details in one place. Easy setup with clear instructions included.
MantisBT
Bug tracker, fits best for software development.
Request Tracker
Enterprise-grade issue tracking system.
ITFlow
Client IT documentation, ticketing, invoicing and accounting for MSPs (Managed Service Providers).
Bugzilla
General-purpose bugtracker and testing tool originally developed and used by the Mozilla project.
Rustrak
Error tracking server compatible with Sentry SDKs, using 32 MB of memory at idle with SQLite storage.
OTOBO
Flexible web-based ticketing system used for customer service, help desk, IT service management.
GlitchTip
Error tracking app to collect errors reported by your app.
BugPin
Visual bug reporting and ticketing tool for web applications.
Deskpro
On-Premise help desk software that includes email, chat, voice & help centre publishing. Full visible source code and API.
EKSO
Help desk ticketing and project/issue tracker.
Forgejo
Lightweight software forge focused on scaling, federation, and privacy (fork of Gitea).
Full Help
Simple, easy to use help desk & knowledge base software. Custom branding, custom themes, restful API, communication channels, multi-company support, multi-language support, and much more! At least 1 new release per month.
JIRA
Professional and extensible issue tracker.
Jitbit Helpdesk
Help desk software - simple but powerful.
Roundup Issue Tracker
Simple-to-use and -install issue tracking system with command-line, web, REST, XML-RPC, and e-mail interfaces. Designed with flexibility in mind - not just another bug tracker.
SupportPal
Powerful help desk software - easy, fast and intuitive.
Telebugs
Lightweight error tracker without a subscription (alternative to Sentry).