Zenefits, a San Francisco-based provider of HR services automation platform provider, has raised $500 million in Series C funding at a $4.5 billion post-money valuation. As of today Zenefits boasts about 10,000 customers and phenomenal growth, courtesy of its free giveaway formula. Zenefits' services are paid by the benefits providers, for example, health insurance carriers. … [Read more...] about HR Software Provider Zenefits Valued $4.5 Bln in Series C Funding