KhataBook, a digital credit ledger for micro SMEs, is one of the fastest-growing startups in Surge 01 2019. The number of active merchants grew from 150,000 in March to 1.8 million in July, and the value of transactions they recorded shot up from $600 million to $2.3 billion in that same short period.  Prateek Sharma talks with Khatabook’s Co-Founder & CEO Ravish Naresh about their hypergrowth.