Electronic invoicing solutions company, Tradeshift, announced it recently brought in $15 million in equity funding.

This round is the first installment of a $57 million round. According to the San Francisco-based company this equity sale is, “part of something much bigger,” though it did not provide further detail.

Tradeshift demonstrated at FinovateEurope 2013 in London where it debuted its Instant Payments feature.