Zammad — #3 Alternative to Intercom / Zendesk
Enterprise-grade open-source helpdesk and IT service ticketing with Elasticsearch speed
Built for high-volume support desks needing full-text attachment search, time accounting, macros, SAML/LDAP SSO, and strict GDPR audit logs.
License: AGPL-3.0 · Pricing: Open Core · Compare all Intercom / Zendesk alternatives · Official Website