After selling consumer-oriented digital phone call companies to Yahoo and Google, Craig Walker decided to disrupt the landline-filled world of business communication. The result was Dialpad, a digital business communication platform built by a cohort of Google Voice alumni, which just raised $50 million to grow its platform. The startup, which was last valued at $250 million in a 2017 funding round, will use its new funding to expand its artificial intelligence offerings and grow its team by at least 100 people. Dialpad CEO Craig Walker wants to replace desk phones once and for all.