Zammad
replaces Zendesk
AGPL-3.0 (OSI-approved, whole repository)
1 projects that cover part or all of what Zendesk does. 1 of them have an open-source core; 0 are source-available; 0 need a human license read.
Zendesk price: $19 per user per month (Support Team plan, billed annually). Support Team $19/agent/mo billed annually ($25 monthly); Suite Team $55; Suite Professional $115. Source: vendor pricing page, checked 2026-11-10. Vendor site: Zendesk site. Put your plan's price into the estimator below if it differs.
Self-hosting saves about $2,940 a year for 20 seats: SaaS $4,560 vs self-host $1,620 (server $144, backups $36, admin time $1,440). Break-even at about 8 seats at these numbers.
Functions differ: an open-source tool rarely matches every Zendesk feature. Self-hosting means you handle updates, backups and security. Sponsored plate: none yet. Advertise.