The short answer
Chargebee was founded in 2011 in Chennai by four friends, two of them from Zoho, and spent over 14 months building before a single customer paid. The first ones arrived in January 2013 and came from the UK and the US, which the team treated as lighthouse customers: accounts that bring revenue but matter more as credibility and as a source of blunt product feedback. Freshworks, through their own network, was an early customer and a useful validation. Because they were in Chennai and not the Bay Area, they leaned on inbound, writing for the problems their prospects already had rather than trying to reach them cold. Half of early revenue came from North America, so global was not a later phase, it was the starting position.