The phone fraud prevention company has increased the size of the round, already featuring Google Capital, GV and Citi Ventures, to $80.8m.

US-based cybersecurity software developer Pindrop Security has increased a series C round led by Google Capital, the growth equity subsidiary of internet technology group Alphabet, to $80.8m according to a securities filing.

Pindrop closed the first tranche of the round at $75m in January this year. Other participants include another Alphabet subsidiary, GV, and Citi Ventures, the venture capital unit owned by financial services provider Citi, as well as Andreessen Horowitz, Felicis Ventures and Institutional Venture Partners (IVP).

The company…