Say a company uses Sudo Africa to issue cards for employee expense management; what happens is that employees are given cards with a low balance so whenever they need to use the card, an API is called each time to decide whether to approve or deny that transaction in real time. However, it seems the trio are almost identical, considering the features each company claims to have on their sites.Tiger Global leads $3M round in Zambia’s Union54 for its card-issuing API The company charges interchange fees when its issued cards are used to make a web or POS transaction and takes authorization fees when spending and location-based controls are made. Sudo Africa is currently the only player in this space that offers its virtual and physical cards service solely in Nigeria.