You can run Zammad on bare metal or on a virtual machine. Choose what you prefer.
- 2 CPU cores
- 2 GB of RAM (+2 GB if you want to run Elasticsearch on the same server)
- 4 CPU cores
- 4 GB of RAM (+4 GB if you want to run Elasticsearch on the same server)
Of course at the end it depends on acutal load of concurent agents and data traffic.