Harvey, the San Francisco company that builds AI software for lawyers, raised $550m at a $15.5bn valuation in a round announced on September 9, 2026. Diffusion and Lightspeed Venture Partners co-led the round.
The valuation is up from $11bn in March 2026, when Harvey raised $200m, and from $8bn in a round the previous December. TechCrunch said the company had nearly doubled its valuation in about nine months.
Harvey did not give the round a series letter. TechCrunch, citing PitchBook data, reported that the company has completed at least eight priced rounds since 2023 and that the new round could be considered a Series F because some earlier rounds were extensions.
“The opportunity for companies to accelerate their competitive advantage with AI has never been higher. Harvey wants to be the global partner legal teams turn to for this work, and we plan to hire and develop the best team in the space to support our clients through the next wave of AI transformation.”Winston Weinberg and Gabe Pereyra, Co-founders, Harvey
Who invested
Diffusion, Lightspeed, Sapphire Ventures and Whale Rock joined as new investors. Existing backers Sequoia, Kleiner Perkins, Andreessen Horowitz, Coatue, Conviction, Elad Gil, Evantic, GIC, Goldman Sachs Alternatives, Verified Capital and WNDR also took part.
Latham & Watkins advised Harvey on the financing, with a team led by Bay Area partners Seth Gottlieb and Alex Kassai, according to the law firm.
What Harvey does
Harvey was founded in 2022 by Winston Weinberg, who is chief executive, and Gabe Pereyra, who is president. It sells AI agents and tools to law firms, in-house legal teams and professional services firms. Its products include agents that carry out legal work end to end, a document store called Vault, research tools, contract analysis and regulatory tracking.
The company said 80% of Am Law 100 law firms use Harvey, along with in-house legal teams at five of the Fortune 10 companies. It did not disclose revenue or headcount in the announcement. Harvey has said it will open offices in Tokyo and Boston.
What the money is for
Harvey said the money will speed up its work helping law firms, in-house teams and professional services firms "build and own their intelligence at scale". The round followed the release of Harvey's first post-trained open-weight model and the launch of Harvey LAB, a benchmark for legal AI agents.
TechCrunch reported that the model, called Harvey Tenet, was built from the open-weight model Kimi K3 and post-trained on legal data, with help from the inference provider Fireworks. Harvey is encouraging customers to adopt and post-train their own open-weight models.
The co-founders said they plan to hire and develop the best team in the field to support clients through the next phase of AI adoption.
The funding so far
TechCrunch reported that Harvey has now raised more than $1.55bn in total. According to Wikipedia, the company raised $5m led by the OpenAI Startup Fund in November 2022, $23m led by Sequoia in April 2023, an $80m Series B at a $715m valuation in December 2023 and a $100m Series C led by GV at a $1.5bn valuation in July 2024.
Rounds came faster after that: $300m at a $3bn valuation in February 2025, $300m at about $5bn in June 2025 co-led by Kleiner Perkins and Coatue, $160m at about $8bn in December 2025 led by Andreessen Horowitz, and $200m at $11bn in March 2026, which Morgan Lewis said was co-led by GIC. That makes the new round Harvey's ninth in under four years.
Company website: harvey.ai