The amount of the transaction was not disclosed.
Below the text of a letter appearing on Impermium’s web site by Mark Risher, CEO and Co-founder on 15th January, 2014.
When we founded Impermium three years ago, our mission was to help rid the web of spam, fraud, and abuse. As sites gain in popularity, criminals and miscreants are never far behind, and Impermium has worked hard to defend some of the largest and fastest-growing sites.
By joining Google, our team will merge with some of the best abuse fighters in the world. With our combined talents we’ll be able to further our mission and help make the Internet a safer place. We’re excited about the possibilities.
We’d like to extend a special thank you to all of our customers and partners. Your support and feedback were invaluable, and we’re glad to have been a part of your growth. We’d also like to thank our invaluable investors, advisors, and supporters, including Accel Partners, AOL Ventures, Charles River Ventures, Data Collective, Freestyle Capital, Greylock Partners, Highland Capital Partners, Morado Ventures, and the Social+Capital Partnership.