A side benefit, the company says, is that Web sites work faster when they are not under attack than they would if they were delivered from in-house infrastructure.
The mirror grids are spread among worldwide cloud data centers run by AWS and Azure and load balanced between the two, Barak says.
The service is offered in two ways. The first is on-demand, so if an attack is succeeding against traditional defenses, customers can switch on a Sentrix mirror grid. The second is full-time use of a mirror grid. Customers pay a flat monthly fee determined by how large a Web site is and the amount of legitimate traffic it receives per month.
The company is using $6 million in venture capital funding from Magma Venture Partners and Cedar Fund to pay for its expansion into the U.S. The company was initially boot-strap funded so limited its reach to Israel where it started up its service in December 2011. It claims to have about 70 customers there, including four of the top banks and three of the top insurance companies.
Barak is a former red team member challenging network defenses for the Israeli Defense Force. Co-founder Nimrod Luria is CTO and a former leader of Microsoft Israel's ACE team. He founded several security startups, the latest being Q.rity, which was bought by Ness. CEO Ofer Wolf is a former Check Point executive and CEO of SterGen, which made 3D video conversion gear.
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