UVdesk is an open-source PHP/Symfony helpdesk for ticketing, email/mailbox integration, workflows, knowledge base and eCommerce connectors.

19.4k stars564 forksOSL-3.0last commit Slowing down
Hiver is a Gmail/Google Workspace–integrated shared inbox and helpdesk platform that lets teams manage support email, assign and track conversations, automate email workflows, enforce SLAs, and generate performance reports.
UVdesk is an open-source PHP/Symfony helpdesk for ticketing, email/mailbox integration, workflows, knowledge base and eCommerce connectors.

19.4k stars564 forksOSL-3.0last commit Slowing down
Open source, web-based helpdesk for managing customer support tickets across multiple channels like email, chat, phone, and social media.

5.8k stars1k forksAGPL-3.0last commit Actively maintained
Free, self-hosted help desk and shared mailbox for managing support email, conversations, tickets, and team workflows as a Zendesk/Help Scout alternative.

4.4k stars695 forksAGPL-3.0last commit Actively maintained
Frappe Helpdesk is an open-source customer support platform with ticket management, agent and customer portals, SLAs, automation rules, and a knowledge base.

3.3k stars894 forksAGPL-3.0last commit Actively maintained
Modern open-source help desk for managing customer conversations with shared inboxes, automation rules, CSAT surveys, roles/permissions, and API/webhooks.

2.7k stars216 forksAGPL-3.0last commit Actively maintained
Request Tracker (RT) is an enterprise-grade ticketing and issue tracking system with email integration, automation, workflows, reporting, and optional asset management.
1.1k stars290 forksGPL-2.0last commit Actively maintained
Open-source, Laravel-based support ticket system for handling customer requests via email, web forms and a REST API; suited for freelancers and small teams.
46 stars10 forksMITlast commit Likely dormant
Python-based, highly customizable issue tracker with web, email, REST, XML-RPC and CLI interfaces; supports multiple databases and extensible workflows.
44 stars15 forkslast commit Actively maintained
Every option on this page is open source and free to run on your own hardware, so you own the data and there is no subscription to cancel. 6 of 8 shipped a commit in the last six months. Licences in this list: OSL-3.0, AGPL-3.0, GPL-2.0, MIT. In exchange you take on hosting, backups and updates yourself.
Browse everything in Customer Support & Ticketing.