The company, formed from the 2011 merger of Ground Truth and Umber Systems, had already disclosed $6.7m of the new financing in an SEC filing earlier this month.

Excelestar Ventures led the financing round, with support from existing Zettics investors North Bridge Venture Partners, Voyager Capital, Steamboat Ventures and Emergence Capital Partners.

Zettics analyses mobile carrier data to help operators understand how data services are being consumed and then use this information to improve their business. Applications include identifying network abuse, and analysing pricing plans based on actual usage in order to enhance advertising offers, reduce churn, improve customer care, and enhance CRM.

President Sterling Wilson (pictured) said: “We are focused on rapidly building our business. We recently added employees with strong operator and big data experience to our management team, and opened offices in London and Singapore. We will continue to quickly expand our global presence in sales, research and development, partnerships, and marketing to keep up with the growing demand for our products from operators worldwide.”