When a bank wants to send text messages to customers to alert them to any unusual activity in their accounts, it may contact Reach-Data first. The London company provides mobile messaging and wireless technology services by teaming up with British mobile-phone operators. It collects a fee for each message and has seen sales grow after a recent surge in demand for bulk messaging services. Reach-Data was founded in 2002 by chief executive Grant Romain. Its sales grew 89% a year from £1.5m in 2006 to £9.9m in 2009.