Collective, the ad tech company that helps businesses unify digital advertising, announced that it has raised $34 million in additional investment today.

The round was led by Columbia Partners with Accel Partners, Greycroft and iNovia participating in the fund. The financing will be used to further develop and expand Collective’s enterprise advertising hub, Visto.

Visto provides the company’s clients with a single interface to manage, track, and optimize media across multiple platforms and publishers, as well as provide additional transparency tin the adtech space.

“Collective is committed to helping clients gain better visibility and efficiency to drive more working media value out of each ad dollar,” said Joe Apprendi, Founder and CEO of Collective, in a statement. “With this increased investment, we will be able to accelerate the rollout of new features and functionality in the second half of 2016 and into 2017. ”True accountability in our industry can only be obtained when enterprises have the technology and tools that allow them to accurately, consistently and transparently leverage data driven media, independent of platform, publisher or services team they work with.”

Collective has already brought on dozens of customers for Visto, as adtech continues to develop more self-service models. The technology will replace the plethora of stacked platforms that advertisers currently use.

“As investors, Columbia Partners is constantly on the lookout for companies we feel offer unique, scalable, products and services in growing industries,” said Jason Crist, Managing Partner of Private Capital. “In Collective, we found a combination of leadership, strategic vision as well as innovative product and services with their recently launched Visto Hub that we believe offer a huge investment opportunity for long term, scalable growth.”

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