We were paying customers for front for a few months in 2018. We quickly outgrew it because our daily email volume grew from a few hundred to a few thousand a da

We were paying customers for front for a few months in 2018. We quickly outgrew it because our daily email volume grew from a few hundred to a few thousand a day. Moved on to Freshdesk which isn't as pretty as Front, but worked better for higher volume of emails.