Natterbox is a UK (Croydon, London) based provider of VoIP Internet telephone service for businesses. The company provides both mobile and landline communications for businesses, as well as mobile call recording and voice-integration with various CRM systems and CTI. All services are customer configurable via an online management portal.The company started its operations in 2009 in Oxted, Surrey. In 2012 Groupon, bought voice services and CRM integration from Natterbox.