How much RAM does Zammad need?

Plan on 4 GB for typical use; add headroom if you expect many concurrent users.

What stack does Zammad run on?

Ruby + PostgreSQL + Elasticsearch + Redis.

Yes — size the plan so Zammad plus your other workloads fit in RAM with room to spare.

Commerce

A full helpdesk and ticketing system.

Handle email, chat and social support tickets with SLAs, knowledge base and reporting.

Zammad gives you a real helpdesk you own, so customer conversations and history stay on your servers.

1
Provision a VPS
Choose a plan with room for your data as well as the app.
2
Install the stack
Install Ruby + PostgreSQL + Elasticsearch + Redis.
3
Deploy the application
Follow the project’s official install guide for your distribution.
4
Enable HTTPS
Serve it on your own domain behind a reverse proxy with a certificate.
5
Back it up
Schedule a database dump plus a copy of any uploaded files to an off-box location.

Give Zammad its own database user with rights only on its own schema.
Reverse-proxy Zammad and terminate TLS at the proxy so certificates are managed in one place.
Take a VPS snapshot before major upgrades so you can roll back cleanly.
Keep Zammad patched — most self-hosting incidents are unpatched software.

How much RAM does Zammad need?: Plan on 4 GB for typical use; add headroom if you expect many concurrent users.
What stack does Zammad run on?: Ruby + PostgreSQL + Elasticsearch + Redis.
Can I run other things on the same VPS?: Yes — size the plan so Zammad plus your other workloads fit in RAM with room to spare.

Looking for something else? Popular alternatives include OTRS/Znuny, osTicket, FreeScout — browse all app guides.