Legal-AI company Harvey raises $550M at $15.5B, up from $11B six months ago
The round, co-led by Diffusion and Lightspeed, pushes Harvey's total raised past $1.55 billion as the company crosses $400 million in annual recurring revenue and counts 80% of the top 100 law firms as customers.
Harvey, the legal-AI company built on Anthropic and OpenAI models, closed a $550 million round on September 9, 2026, co-led by Diffusion and Lightspeed Venture Partners, at a $15.5 billion valuation. That's up from $11 billion in March 2026 and $8 billion in December 2025, roughly a 40% jump in six months. The company has now raised $1.55 billion total, crossed $400 million in annual recurring revenue, and serves more than 3,000 customers, including 80% of the top 100 law firms by revenue.
A vertical bet
Compare Harvey with the general-purpose coding-agent funding moving this week. Harvey sells a workflow wrapped around a model, built for one regulated profession with its own compliance and liability requirements. That focus supports enterprise legal-services pricing in place of per-seat developer-tool pricing, and it explains much of why the ARR-to-valuation ratio here (roughly 39x) looks different from a horizontal AI product's.
The acquisition pace behind the funding
The same day, Harvey announced its fourth acquisition of 2026: Guardrails AI, an agent-safety and evaluation startup (see the companion story on this deal). Buying safety tooling while raising at a 40% higher valuation tells enterprise buyers that Harvey intends to own agent governance itself. Regulated-industry customers are asking harder questions about what happens when an AI agent gets something wrong, and Harvey wants to be the one answering them.