The London and California-headquartered business has raised $43.5m (£27m) from its VC backers, which includes Balderton, Montagu Newhall Associates and Scale Venture Partners.
Its technology is designed to protect corporate networks from viruses and spyware, and to allow companies to control and securely use the internet.
It was the first company in the world to offer comprehensive web security without the need for premises-based hardware or software.
ScanSafe provides its web security offerings to partners including AT&T, Sprint and Orange and currently employs around 150 people.
“Cisco has a good record of acquiring companies,” said Balderton partner Bernard Liautaud. “They’ve built out a business in premise-based security but didn’t have an equivalent on-demand offering.”
Real Business has teamed up with Cisco to find the country’s most customer-focused businesses. Find out more about our Customer Kings 2010 campaign here.
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