Top Open‑Source Help Desk Options for Budget‑Conscious Organizations

Mature ticketing system with email piping, customizable ticket fields, SLA management, and a rich knowledge base.

Modern, web‑based help desk with real‑time chat, social media integration, and powerful search powered by Elasticsearch.

Feature‑rich ticketing platform offering multi‑channel support, automation rules, and a marketplace of extensions.

ITSM suite that combines asset management, service desk, and knowledge base in a single open‑source solution.

Flexible ticketing system with workflow automation, reporting, and a large ecosystem of community‑maintained modules.

Robust, email‑centric ticketing engine with powerful custom fields, queues, and a mature Perl‑based codebase.

Lightweight PHP ticket system with a simple UI, email notifications, and basic knowledge‑base functionality.

Open‑source help desk built on Laravel, offering ticket automation, SLA management, and a marketplace of add‑ons.

A modern fork of OTRS delivering an intuitive UI, integrated chat, and advanced reporting while staying fully open source.

Simple, PHP‑based help desk with ticket submission, knowledge base, and built‑in live chat; free core version is open source.

Originally an issue tracker, MantisBT can be adapted for help‑desk use with plugins for email integration and SLA tracking.

Lightweight, web‑based bug/issue tracker that can serve as a minimal help desk when paired with email piping.