The media verification company, previously backed by an affiliate of Comcast, takes its total venture funding raised in its history to at least $46.5m.

Genacast-backed online media verification company DoubleVerify has secured $33m in funding from a range of private equity and venture capital (VC) firms.

The round was led by private equity firms JMI Equity and Institutional Venture Partners (IVP) with participation from VC firms Blumberg Capital and First Round Capital.

Genacast, a corporate venturing affiliate of telecommunications and broadcasting conglomerate Comcast, made its initial investment in DoubleVerify’s series A round, which raised $3.5 in May 2009.

DoubleVerify secured $10m in…