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Harvey

Harvey is the San Francisco AI platform for legal and professional services, founded in 2022 and now the most valuable and best-funded company in legal AI. It trains its own open-weight legal models.

Harvey logo
Founded
2022
Headquarters
San Francisco, CA
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)
Status
Private; four acquisitions in 2026 incl. Guardrails AI
Latest valuation
~US$15.6B
Customers
80% of top US law firms
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.

Frequently asked questions

Why is an untested new firm co-leading Harvey's US$550M round?

Because the relationship predates the firm: Diffusion was co-founded by Kris Fredrickson, a longtime Harvey backer from his Coatue years — he was there for the June 2025 growth round Coatue co-led. The September 2026 syndicate is otherwise continuity — GIC, Sequoia, a16z, Kleiner Perkins, Conviction, Elad Gil all repeat — so the 'new' co-lead is a partner changing desks, not a new bet.

Why is a legal-AI application company training its own models?

Because the moat moves down the stack: weeks before the September round, Harvey launched Tenet — an open-weight legal model post-trained on Moonshot's Kimi K3, a Chinese open base rather than a US one — with proceeds earmarked for model talent and compute. That ends dependence on OpenAI (its seed-era backer) and Anthropic for core capability, echoing Mistral's open-weight doctrine.

Why did Harvey's 2024 round come in smaller than it reportedly sought?

Because the acquisition it wanted collapsed: The Information reported Harvey pursuing ~US$600M at US$2B+ to buy legal-research service vLex; when that fell through, July 2024's Series C landed at US$100M and a US$1.5B valuation. The 2026 consolidation urge returned as tuck-ins — four acquisitions that year, capped by Guardrails AI at the US$15.6B round — teams bought from a far stronger base.

What does the 42% valuation jump in six months actually price?

Mostly revenue doubling: US$11B (March 2026 Series G) to ~US$15.6B (September), with roughly 80% of top US law firms as customers. Lightspeed supplies the ceiling argument — legal as the second-largest addressable AI market after code — and code's number one shows the headroom: Cognition at US$48B on ~US$900M run-rate, about three times Harvey's mark at comparable growth.

Does OpenAI still have a stake in — and hold over — Harvey?

Financially yes, strategically less each quarter: the OpenAI Startup Fund anchored the 2022 seed and followed through Series A, B and the 2024 Series C. But Tenet's Kimi K3 base and model-talent spending reposition Harvey from OpenAI-dependent to model-agnostic — a move Lovable paralleled with an in-house trained model, and Clay never faced, selling workflow to OpenAI as a customer.