Harmonic, an artificial intelligence (AI) lab focused on Mathematical Superintelligence (MSI), has announced a $100 million Series B funding round, valuing the company at nearly $900 million post-money.
The round was led by Kleiner Perkins with significant participation from Paradigm. Additional investors included Ribbit Capital and existing backers such as Sequoia Capital, Index Ventures, and Charlie Cheever. This new capital is intended to accelerate Harmonic’s development in mathematical reasoning and advance the commercialization of its flagship model, Aristotle.
Aristotle utilizes MSI to verify accuracy, ensure coherent logical reasoning, and transparently flag errors and inconsistencies. This approach differs from language-based AI models, which can be prone to producing inaccurate information. Harmonic states that Aristotle aims to replace probabilistic guesses with provable solutions in high-stakes, real-world applications.
According to Tudor Achim, CEO of Harmonic, Aristotle’s MSI is designed for mission-critical applications where precision is paramount. These include generating verified software and formally verifying existing code, which are considered breakthroughs for industries such as blockchain, financial services, aerospace, and other safety-sensitive systems. The MSI model is built to solve complex mathematical problems beyond typical human capabilities, potentially enabling advancements in fields like theoretical physics and engineering.
Vlad Tenev, Co-Founder and Executive Chairman of Harmonic, noted that the company is progressing towards AI that can reason quickly, reliably, and at scale. He added that Mathematical Superintelligence is transitioning from a research concept to practical applications, with Aristotle preparing to make this AI capability available to users.
Ilya Fushman, a partner at Kleiner Perkins and a former physicist, stated his belief that Harmonic has established a new foundation for verified, scalable reasoning suitable for high-stakes environments. Fushman will join Harmonic’s board as an observer, alongside existing board member Andrew Reed from Sequoia and existing board observer Jan Hammer from Index.
Harmonic, founded in 2023, is backed by Robinhood CEO Vlad Tenev and led by CEO Tudor Achim. The company previously raised $75 million in its Series A funding round in September 2024. That round was led by Sequoia Capital, with significant participation from Index Ventures, and additional backing from DST Global partners and Nikesh Arora. Harmonic is headquartered in Palo Alto, California.
