Founders David Jackson and Charles Cooper-Driver, both 57, developed this Surrey company’s patented telephone-payment method when working at a call centre. Its Cardprotect software masks keypad tones when consumers type card information into a phone keypad, so the payee cannot access the payment information. Semafone started in 2009 and in 2014 it raised £5m from BGF and Octopus Ventures. It has clients in 25 countries and international sales rose to £4.4m in 2016.

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Company details
Year2018
Rank90
CompanySemafone
ActivityPayment services developer
LocationGuildford
2 yr av intl sales growth % pa39.22%
International sales £000s4,437
Total sales £000s8,313
Staff77
Founded2009
Websitewww.semafone.com

If applicable:

* Supplied by company † Annualised figure