Veem replication with free esxi

hi,

i have 2 free esxi host on production site and 2 free esxi hosts on recovery site. i want to know whether i can use veem or any other replication software to replicate my VMs from production site to recovery site? because i cant use vcenter as this is a free hypervisor. so is there any possibility to use any replication software with this free hypervisor?

thanks