Each country/state has different commercial machine dealers.
As a generic starting point, we are sharing a few popular and reliable commercial espresso machine manufacturers, in no particular order, who also have entry levels models suitable for home use. Commercial espresso machines come in various capacity factors - single group vs multiple groups, pour over or plumbed-in, semi automatic vs fully automatic and so on.
Do remember that the best espresso machine for you is one which has the best after sales service & support s network in your location. All espresso machines do need service and spares regularly. Visit these websites, look at their dealers page to find one nearest to your location:
Semi automatic espresso machines
Superautomatic espresso machines
Do check out our coffee hardware vendor directory to find out where to buy such machines in India.