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Harvey logoFunding timeline

Harvey

The legal-AI leader that went from law-firm copilot to most valuable company in legal AI

Harvey is the San Francisco-based AI platform for legal and professional services, founded in 2022 by former securities litigator Winston Weinberg and DeepMind/Google Brain alum Gabriel Pereyra. It built an AI 'copilot' for lawyers on top of frontier models, then began training its own legal-specific models — launching its first open-weight legal model, Harvey Tenet (built from Moonshot's Kimi K3 base), in 2026. Its funding arc tracks the legal-AI category: ~US$5M seed backed by OpenAI (2022), a US$21M Series A led by Sequoia (2023), US$80M at US$715M (late 2023), US$100M at US$1.5B led by GV (July 2024), a US$300M round at US$5B (mid-2025), US$200M at US$11B led by GIC/Sequoia/Kleiner Perkins (March 2026), and — announced 9 September 2026 — a US$550M round at ~US$15.6B co-led by Lightspeed and the new firm Diffusion, alongside the acquisition of AI-agent-security startup Guardrails AI (its fourth acquisition of the year). Harvey has now raised more than US$1.5B, making it the most valuable and best-funded company in legal AI.

Harvey logo
Founded
2022
Headquarters
San Francisco, California
Founders
Winston Weinberg (ex-O'Melveny & Myers); Gabriel Pereyra (ex-DeepMind / Google Brain / Meta AI)
Sector
Legal AI / AI for professional services
Product
AI copilot + workflow for law firms; Harvey Tenet (open-weight legal model, 2026)
Customers
80% of top US law firms (per Sep 2026 reports)
Total raised
>US$1.5B
Latest valuation
~US$15.6B (US$550M round, Sep 2026)
Valuation arc
US$715M (2023) → US$1.5B (2024) → US$5B (2025) → US$11B (Mar 2026) → US$15.6B (Sep 2026)
Status
Private; four acquisitions in 2026 incl. Guardrails AI
Rounds recorded
7
Total raised
$1.26B
harvey.ai

Funding timeline

Every disclosed equity round for Harvey, newest to oldest, with lead and participating investors where reported. Data is stored oldest-first; the timeline is displayed latest-first.

  1. Sep 9, 2026

    New round

    $550Mat $15.6B valuationLatest
    Led by Lightspeed Venture PartnersLed by DiffusionSapphire VenturesWhale Rock Capital ManagementSequoiaAndreessen HorowitzKleiner PerkinsCoatueConvictionElad GilEvanticGICGoldman Sachs AlternativesVerified CapitalWNDR

    Co-led by Lightspeed and Diffusion, a new firm co-founded by Kris Fredrickson (a longtime Harvey backer who previously invested via Coatue). Announced together with the acquisition of Guardrails AI (AI-agent security; Harvey's fourth acquisition of 2026). Harvey has now raised more than US$1.5B in total.

    Source ↗

  2. Mar 25, 2026

    Series G

    $200Mat $11B valuation
    Led by GICLed by Sequoia CapitalLed by Kleiner PerkinsAndreessen HorowitzCoatueConvictionElad GilEvantic

    Led by GIC with Sequoia and Kleiner Perkins, pricing Harvey at US$11B six months before the September round (matches Frontier Rounds' Funding Leaderboard snapshot).

    Source ↗

  3. Jun 23, 2025

    Growth round

    $300Mat $5B valuation
    Led by Kleiner PerkinsLed by CoatueGV (Google Ventures)OpenAI Startup FundSequoia Capital

    Reported mid-2025 round led by Kleiner Perkins and Coatue, tripling the valuation to US$5B. (Multiple further secondary/extended rounds moved Harvey's reported valuation through ~US$8B during late 2025 — third-party tracker reports vary.)

    Source ↗

  4. Jul 23, 2024

    Series C

    $100Mat $1.5B valuation
    Led by GV (Google Ventures)OpenAIKleiner PerkinsSequoia CapitalElad GilSV Angel

    Led by GV. The Information had reported Harvey sought ~US$600M at a US$2B+ valuation to acquire legal-research service vLex; those plans fell through, producing this smaller Series C.

    Source ↗

  5. Dec 21, 2023

    Series B

    $80Mat $715M valuation
    Led by Kleiner PerkinsLed by Sequoia CapitalOpenAI Startup FundElad Gil

    Kleiner Perkins and Sequoia led, valuing the two-year-old startup at US$715M.

    Source ↗

  6. Apr 26, 2023

    Series A

    $21M
    Led by Sequoia CapitalOpenAI Startup FundConvictionSV AngelElad Gil

    Led by Sequoia — Harvey's first widely announced round.

    Source ↗

  7. Nov 25, 2022

    Seed

    $5M
    Led by OpenAI Startup FundJeff DeanElad Gil

    Early backing anchored by the OpenAI Startup Fund (with angel Jeff Dean and Elad Gil), before the product's public launch. Amount ~US$5M per trackers.

    Source ↗

The story behind the numbers

From roommate demo to legal AI's biggest company

Pereyra showed Weinberg OpenAI's GPT-3 and Weinberg — a former O'Melveny & Myers securities litigator — realized it could transform legal workflows. The two launched Harvey in 2022, and the startup became the category's defining vendor: by September 2026 it counted ~80% of top US law firms as customers, and its valuation has risen from US$11B (March) to US$15.6B (September), a 42% jump in six months with revenue roughly doubling over the same period.

Own the model, own the category

Harvey's 2026 strategy shift is toward its own models: weeks before the September round it launched Harvey Tenet, its first post-trained open-weight legal model (based on Moonshot's Kimi K3), trained specifically for legal tasks. The US$550M round is earmarked for model talent and compute — moving beyond building on top of OpenAI/Anthropic models.

Four acquisitions and a platform play

The Guardrails AI deal (agent-security testing, co-founders Shreya Rajpal and Zayd Simjee joining Harvey's product org) is Harvey's fourth acquisition of 2026. Founder Weinberg says more are likely, treating deals largely as acqui-hires for strong teams — a consolidation pattern that matches Lightspeed's view that legal is the second-largest addressable AI market after code.

A valuation justified by market size

Lightspeed estimates legal is the second-largest addressable AI market, and that market argument underpins the ~US$15.6B valuation. With >US$1.5B raised, Harvey is simultaneously the most valuable and best-funded company in legal AI — the reference point against which every legal-AI competitor (Legora, Robin AI, Spellbook, etc.) is now measured.

More in the Atlas

Harvey's lead investors are profiled in the Investor Atlas when their firms join the directory. Track who backs every frontier AI round on the Funding Leaderboard.