4 February 2016 Last updated at 17:45 GMT
The Meem cable is designed to make a copy of your phone contacts, photos and more every time you plug it in to charge.
The company's chief executive Kelly Sumner told the BBC's Chris Foxx some people didn't trust the cloud services smartphone manufacturers provide.
A phone charging cable that backs up your data as you top up your battery has been produced by a British firm.