This company designs and manufactures smart devices to help people monitor and manage energy usage in their homes via a PC or a smartphone. Co-founders Patrick Caiger-Smith, 54, and Simon Anderson, 65, started the Cambridge business in 2006 and have sold nearly 3m devices, mostly through companies such as British Gas and EDF, lifting sales to £14.9m in 2016. The company is backed by the Low Carbon Innovation Fund and has other investors including the recently signed-up Dragon Nick Jenkins and Lord Oxburgh, former chairman of Shell.

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Company details
Year2016
Rank39
CompanyGreen Energy Options
ActivitySmart home monitoring
LocationCambridge
Average 3 year sales growth86.98%
Latest sales £000s*14,835
Staff60
Founded2006
Websitewww.geotogether.com

If applicable:

* supplied by company † annualised figure