Fonix Plc provides mobile payments and messaging, and managed services for media, charity, gaming, e-mobility, and other digital service businesses in the United Kingdom and the rest of Europe. The company offers carrier, SMS, and voice billing services. It also provides payment APIs for mobile operated payments, checkout services, campaign manager platform, messaging APIs for SMS delivery, and user verification services. The company was formerly known as Fonix Mobile plc. and changed its name to Fonix Plc in August 2024. Fonix Mobile plc was incorporated in 2006 and is based in London, United Kingdom.