Media quality measurement firm Integral Ad Science has completed a $27m (£17.3m) round of funding.
Led by Sapphire Ventures, the round also included Cross Creek Advisors and existing investors August Capital, Pelion Venture Partners and Atlas Venture.
Integral also received a debt facility of $40m from Silicon Valley Bank.
“It has been a tremendous year for Integral Ad Science, but our work is not finished,” said CEO Scott Knoll. “The expertise in marketing tech that Sapphire Ventures brings to the table makes this partnership especially exciting for us. This will undoubtedly help shape the future of Integral Ad Science and the impact we make on the industry as a whole.”
Integral's doubled its headcount in 2014 and anticipates to double it again by the end of 2015, as it expands into new markets including France and Japan.