Robinhood CEO’s AI Math Startup Valued at Nearly $900 Million

Harmonic AI, an artificial intelligence startup co-founded by Robinhood Markets Inc. Chief Executive Officer Vlad Tenev, has raised $100 million in funding to tackle a problem that has sometimes confounded AI models: math.

The Series B funding round was led by Kleiner Perkins, with participation from Sequoia Capital, Index Ventures and Paradigm. The deal values the AI startup at $875 million, said Tenev, who serves as the company’s executive chairman, a non-operating role. Harmonic’s CEO is Tudor Achim, who previously led autonomous driving startup Helm.ai.

Founded in 2023 by Tenev and Achim, the Palo Alto, California-based startup aims to build AI systems that can solve complex math problems, ...