Zenefits raises $500 million for its HR software and insurance hybrid, beating off new customers ‘with a stick’

Zenefits, an all-in-one HR software service which only launched two years ago, announced today that it has raised $500 million in new funding led by Fidelity Management and TPG, valuing the company in the quad-unicorn realm of $4.5 billion. [Source: Pando.com]