osTicket

osTicket is a widely used open source support ticket system for collecting and managing customer requests in one place. It turns inquiries from website forms, email, and phone into tickets in a multi-user web interface, so agents can organize, respond to, and archive support work without switching systems.

Customers open tickets through your website, email, or phone, and incoming tickets are saved and assigned to agents for resolution. The lightweight web interface keeps requests, responses, and history together, giving teams a single place to track and close out support work.

The interface is fully translatable, with downloadable language packs and in-browser translation, so support can run in your customers' languages. osTicket self-hosts on a server running Microsoft IIS or Apache with PHP 8.2 to 8.4 and MySQL 5.5 or later, and commercial support is available for teams that want it.