Israeli-Dutch AI startup Wonderful has raised $550 million in a Series C round at a $5 billion valuation, more than doubling its $2 billion valuation from approximately six months prior. Insight Partners led the round with participation from returning investors Index Ventures, IVP, Vine Ventures, 9Yards, and Bessemer Venture Partners, while Salesforce joined as a first-time investor. Founded in early 2025, the company operates across more than 35 countries and has evolved from its customer service AI agent roots to offer the "Wonderful AI OS" platform for coordinating agents, workflows, and AI applications. Wonderful said it will use the funding to accelerate product development, expand its field deployment engineering (FDE) teams, and meet growing demand.