The Manchester, N.H., Internet infrastructure company Dynamic Network Services Inc., better known as Dyn, has raised a $38 million round of outside funding led by the Waltham venture capital firm North Bridge. The investment into the fast-growing company, which counts Twitter and Zappos as customers, is the first time Dyn has accepted venture capital into the firm, which was founded in 2001 by four former Worcester Polytechnic Institute students.
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