Zammad

Zammad is an open-source helpdesk and ticketing platform developed by Zammad GmbH in Berlin, founded by Martin Edenhofer, who previously created OTRS. It handles email, live chat, social channels, and phone, plus a knowledge base and reporting.

Teams can self-host Zammad for full data control or use the vendor’s EU-hosted managed cloud, both under GDPR. The code is AGPL-licensed and the company is independently held with no US parent.