I am close to get a dedicated server in some data center and in the shopping cart there is no option to RAID1 Hardware only RAID1 by Software, since they will install ESXi it's possible that ESXi can run a software to emulate a hardware RAID1? how it will affect the performance?
No. This is not possible. VMware ESXi can live on a non-RAID disk or a hardware RAID solution, but has no provision for software RAID.
I would contact the provider and express your intentions to see what they have that could meet VMware's hardware requirements.