A string of high-profile data leaks and a growing awareness of cyber-crime have heightened demand for the secure data storage devices produced by this London firm. Its flash and hard drives can be accessed only with a Pin code and will destroy their contents if tampered with. Alongside blue-chip companies such as Google and BP, the firm’s customers also include the Ministry of Defence, HMRC and the Metropolitan police. Co-founded in 2009 by chief executive John Michael, 48, the London-based company exports to 50 countries and increased sales to £5.7m in 2015.

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Company details
Year2016
Rank93
CompanyiStorage
ActivityPortable data storage
LocationMiddlesex
Average 3 year sales growth46.38%
Latest sales £000s5,726
Staff15
Founded2009
Websitewww.istorage-uk.com

If applicable:

* supplied by company † annualised figure