Harvey
FeaturedAI for the world's leading law firms.
Founded in 2022 by Winston Weinberg and Gabriel Pereyra in San Francisco, Harvey was purpose-built to apply large language models to the complex and high-stakes world of legal work. It quickly became the most trusted AI tool in the legal industry, adopted by 200 of the world's top law firms including A&O Shearman, PwC Legal, and Skadden. Harvey's models are fine-tuned on vast amounts of legal data and understand the nuance, jurisdiction-specific language, and precision that legal work demands. In 2025, Harvey raised $300 million at a $3 billion valuation, and expanded from law firms into in-house legal teams at major corporations, cementing its position as the dominant AI platform in legal.
Active Founders
Winston Weinberg
Founder / CEO
Winston Weinberg is the co-founder and CEO of Harvey. A former litigator at O'Melveny & Myers, Winston brought deep first-hand experience of the inefficiencies and pain points of legal work to the founding of Harvey. His legal background gives him a unique ability to design AI tools that lawyers actually trust and use in high-stakes situations. Under his leadership, Harvey has grown from a Y Combinator startup into the dominant AI platform across the global legal industry.
Gabriel Pereyra
Co-Founder / CTO
Gabriel Pereyra is the co-founder and CTO of Harvey. A former research scientist at DeepMind and Meta AI, he brings world-class machine learning expertise to the legal AI space. Gabriel has built Harvey's proprietary legal AI models and fine-tuning pipeline, which allow the platform to outperform general-purpose language models on legal reasoning tasks. His research background in language models and reinforcement learning from human feedback directly informs Harvey's approach to building trustworthy legal AI.
Harvey
