US-based web analytics company Chartbeat has secured $15.5m in a series C round backed by internet company and incubator Digital Garage.
Venture capital firm Harmony Partners led the round, with Draper Fisher Jurvetson (DFJ), Index Ventures as well as angel investors Jason Calacanis and Jeff Clavier also participating.
Chartbeat has developed a real-time analytics platform which tracks and analyses user engagement with online advertising. When the platform detects activities indicating whether an ad has been seen, it swaps the advert for a new one after a set amount of time.
The company has also developed a tool which helps publishers create more attractive headlines by providing analytics of which perform best.
DFJ and Index Ventures previously provided $3m in funding in March 2014, after investing $9.5m for Chartbeat’s series B round in 2012. Chartbeat secured $1m in debt financing from unnamed investors earlier the same year.
In 2010, O’Reilly AlphaTech Ventures, the corporate venturing subsidiary of media company O’Reilly Media, participated in a $3m series A round led by Index Ventures that also included SV Angel, Lowercase Capital, Founder Collective, Lerer Ventures, Freestyle Capital, Betaworks, SoftTech VC and Jason Calacanis.