Volopay founders Rajith Shaji and Rajesh Raikwar Small- to medium-sized companies that do a lot of international business have to deal with two big headaches: high foreign exchange fees and corporate expense tracking. Volopay, a Singapore-based financial tech startup with offices in Bangalore, wants to help by integrating prepaid multi-currency corporate cards, expense tracking and accounting tools into one free-to-use platform. Volopay is currently taking part in Y Combinator and is also part of Antler and Nium’s Bolt, two other accelerator programs. It now has about 40 clients in Singapore,…