The dependence of businesses on computers and mobile phones has made disaster recovery software popular in recent years. Neverfail says it has gone one step further and developed software that can detect when an application is about to fail, and switch to another server. Its customers include the mobile-phone companies Vodafone and O2, which sell its software to BlackBerry users to protect their email. The Berkshire firm was founded in 1993 and is led by chief executive Peter Parker. Sales have grown 35% a year from £4.8m in 2007 to £11.9m in 2010, when the company made a significant loss.