Harvey
Product brand
UnclaimedHarvey is a generative-AI platform designed for law firms and in-house legal teams.
Last updated October 14, 2026
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Overview
Harvey is a generative-artificial-intelligence product for legal work, developed by Counsel AI Corporation. The platform is positioned around customized large language models, workflow tools, and document-oriented assistance for law firms, corporate legal departments, and other professional-services users. Its capabilities are intended to support activities such as legal research, drafting, document review, due diligence, litigation preparation, regulatory analysis, and work involving large collections of legal materials. Harvey is designed as an aid to lawyers rather than as an autonomous substitute for professional legal judgment: customers have emphasized that generated answers must be checked, validated, and reviewed by qualified lawyers before they are relied upon or delivered to clients. The company was founded in the summer of 2022 by Winston Weinberg, then a securities and antitrust litigator at O'Melveny & Myers, and Gabriel Pereyra, a research scientist who had worked at Google DeepMind and Meta. The founders were roommates in Los Angeles. Pereyra introduced Weinberg to OpenAI's GPT-3, and Weinberg recognized that generative models could be adapted to improve legal workflows. They developed an early system using prompt-based reasoning around California tenant law and tested it against 100 legal questions drawn from a public forum. Three attorneys assessed the responses and judged 86 suitable for delivery to clients without changes. The experiment led the founders to contact OpenAI, whose executives met with them in July 2022. OpenAI subsequently became a seed investor and provided early access to GPT-4. Harvey's early differentiation came from combining general-purpose foundation models with legal expertise and domain-specific product development. The business recruited lawyers from major firms into product, customer-facing, and sales roles. That staffing approach helped the company understand law-firm procurement, professional responsibility concerns, confidentiality requirements, and the practical limits of AI-generated legal work. Gordon Moodie, a corporate partner at Wachtell, Lipton, Rosen & Katz, joined in July 2023 as chief product officer. The product gained early adoption among major international law firms. Paul Weiss began testing Harvey in January 2023 and later became a customer. Allen & Overy, now part of A&O Shearman, announced a trial in February 2023 after using the system through its Markets Innovation Group. The firm reported that approximately 3,500 lawyers had used Harvey for about 40,000 queries during the trial, while stressing that all output required careful lawyer review. Other announced users or partners included A&L Goodbody, Ashurst, PwC in Singapore, and Singapore's WongPartnership. These deployments placed Harvey within the broader movement toward controlled, enterprise-grade generative AI in legal services. Harvey expanded its commercial and technical offering during 2024. In May, it announced availability on Microsoft Azure and described plans for a Harvey-on-Azure version. It also indicated that selected capabilities, including case-law models, an AI assistant, specialized models, and Vault for prompting over large document collections, would be offered through commercial product bundles. The company continued to raise substantial venture funding and described international expansion and broader legal-product development as important strategic priorities. The brand name refers to Harvey Specter, the lead character in the legal drama Suits. In 2026, Harvey announced a brand partnership with actor Gabriel Macht, who played Specter, and later announced sponsorship arrangements involving the Golden State Valkyries and New York Liberty. These initiatives connected the technology brand with the popular culture association that inspired its name. Harvey remains a private, active legal-technology business, with its principal commercial identity centered on secure, specialized AI assistance for sophisticated legal teams.
History
Harvey originated in 2022 when Winston Weinberg, a securities and antitrust litigator, and Gabriel Pereyra, an AI researcher, explored whether emerging language models could be adapted to legal practice. The founders created an early prompt-based system focused on California tenant law. In an evaluation using 100 publicly posted legal questions, three attorneys approved 86 answers as potentially suitable for delivery without alteration. The result encouraged the founders to approach OpenAI. After a July 2022 meeting with OpenAI executives, OpenAI became an early investor and gave the startup access to GPT-4. The company developed around the idea that general-purpose models require substantial legal specialization, workflow integration, and professional oversight before they can be useful in serious legal environments. Harvey therefore targeted law firms and in-house legal departments rather than general consumers. Its product scope expanded to include legal research, drafting, document analysis, due diligence, litigation support, regulatory work, specialized models, and analysis of large document collections through Vault. Harvey's adoption strategy relied heavily on legal-industry expertise. The company recruited lawyers from prominent firms, including White & Case, Latham & Watkins, Skadden, Gunderson Dettmer, Katten Muchin Rosenman, and Paul Weiss, and used former large-law-firm attorneys in sales and product functions. This gave the business credibility with prospective customers and helped it address confidentiality, accuracy, review, and professional-responsibility concerns. Paul Weiss tested Harvey beginning in January 2023 and later became a customer. Allen & Overy announced a trial in February 2023, describing use by its Markets Innovation Group. During that trial, about 3,500 lawyers reportedly submitted approximately 40,000 queries. The firm warned that every output required review by a lawyer. A&L Goodbody announced a relationship with Harvey in February 2024 covering document analysis, due diligence, litigation, and regulatory compliance. Ashurst announced a partnership in June 2024 and planned a worldwide rollout. In September 2024, PwC said it would use Harvey with lawyers in Singapore, while WongPartnership became the first Southeast Asian law firm reported to be testing the platform. Harvey also broadened its infrastructure and packaging. In May 2024, it announced availability on Microsoft Azure and described commercial access to selected case-law models and bundles combining an AI assistant, specialized models, and Vault. These moves supported enterprise deployment and offered customers a route to integrate legal AI into existing cloud and document environments. The company attracted several rounds of venture financing during its expansion, with participation reported from the OpenAI Startup Fund, Sequoia Capital, Kleiner Perkins, GV, Coatue, Andreessen Horowitz, EQT, WndrCo, Conviction, Elad Gil, and other investors. The reported rounds were associated with rapidly increasing private valuations, although Harvey is not publicly listed. By 2026, the company had also begun using the cultural connection behind its name in marketing, partnering with Gabriel Macht, who played Harvey Specter in Suits, and announcing sponsorships involving the Golden State Valkyries and New York Liberty. Its core identity remains that of a specialized legal-AI platform intended to augment, rather than replace, lawyer-led work.
- 2026
Entertainment partnership and sports sponsorships
[1]Harvey announced a partnership with Gabriel Macht and sponsorships involving two professional women's basketball teams.
- 2024
Azure deployment announced
[1]Harvey announced availability on Microsoft Azure and commercial packaging for selected legal capabilities.
- 2023
Major law-firm trials expanded
[1]Paul Weiss and Allen & Overy became prominent early adopters or testers of Harvey's legal AI tools.
- 2022
Harvey founded
[1]Winston Weinberg and Gabriel Pereyra founded Harvey after testing language-model outputs on legal questions.
- 2022
OpenAI became an early investor
[1]OpenAI invested at the seed stage and provided the founders with early access to GPT-4.
Products and positioning
A domain-specialized, enterprise-oriented generative-AI platform for law firms and in-house legal teams, emphasizing customized models, legal workflows, document intelligence, and lawyer-controlled review.
Legal generative AI assistant
Harvey AI Assistant
A conversational and workflow-oriented assistant intended to help legal professionals research issues, draft materials, analyze information, and generate work product. Its output is designed for lawyer review rather than unsupervised client delivery.
Domain-specific language models
Harvey specialized models
Customized models adapted for legal tasks and professional workflows. The offering reflects Harvey's emphasis on combining foundation-model technology with legal-domain context and controlled enterprise use.
Legal research · 2024
Harvey case-law models
Models and related capabilities intended to support analysis of case law and legal authorities. Harvey announced that selected case-law capabilities would be made available through commercial product offerings.
Document intelligence · 2024
Harvey Vault
A capability for running prompts and analysis over large collections of documents, supporting document-heavy legal tasks such as review, diligence, litigation preparation, and regulatory analysis.
Cloud deployment · 2024
Harvey on Microsoft Azure
An Azure-based deployment option announced to support enterprise customers seeking to use Harvey within Microsoft's cloud environment and existing organizational infrastructure.
Marketing campaigns
- 2026Gabriel Macht brand partnership
International digital
Harvey partnered with Gabriel Macht, who portrayed Harvey Specter in Suits, linking the product's name to the legal-drama character and using the partnership to launch the company's Instagram presence.
Outcome. The partnership served as Harvey's first reported brand partnership and extended its name-origin association into consumer-facing marketing.
- 2026Women's basketball sponsorships
United States
Harvey was reported to sponsor the Golden State Valkyries and the New York Liberty.
Outcome. The sponsorships broadened Harvey's visibility beyond legal-technology audiences, although detailed campaign performance was not provided.
Brand decisions
2024
Move toward Azure-based enterprise deploymentStrategyBackground
Law firms and corporate legal teams often require controlled cloud deployment, enterprise security, and integration with existing document and technology environments.
Action taken
Harvey announced availability on Microsoft Azure and described a continuing Harvey-on-Azure offering alongside commercial product bundles.
Aftermath
The move gave enterprise customers an additional deployment route and supported broader commercialization of Harvey's legal models and document tools.
2023
Build product and sales teams around legal expertiseStrategyBackground
Legal customers require confidence around accuracy, confidentiality, professional responsibility, and the practical review of AI-generated work.
Action taken
Harvey recruited lawyers from major law firms into product and sales roles and used their experience to support product development and customer adoption.
Aftermath
The lawyer-heavy operating model was described as an important factor in persuading large firms to trial the platform and adapt it to legal workflows.
Recent events
Reported
Google Cloud launches Gemini Enterprise for Financial Services and Legal[3]
Google Cloud announced Gemini Enterprise for Financial Services and Gemini Enterprise for Legal, the first in a planned series of industry-specific solutions built on its Gemini Enterprise platform. The financial-services product includes a Google-managed Financial Research agent, more than 50 specialized skills and 13 data connectors to providers including FactSet, LSEG, Moody's and MSCI, with Deutsche Bank as a design partner and CME Group among early users. The legal product targets contract review, due diligence, regulatory monitoring, legal research and privacy requests, connecting with iManage, NetDocuments, RelativityOne, Thomson Reuters, Harvey and CourtListener, with law firms including Cleary, Freshfields, Weil and Williams & Connolly among launch customers.
Reported
Google launches Gemini Enterprise for Legal[4]
Google launched Gemini Enterprise for Legal, an agentic AI platform for lawyers that supports legal research, contract lifecycle management and brief drafting, and integrates with legal technology companies including LexisNexis, Thomson Reuters, Harvey, Legora, iManage, Courtroom5 and Everlaw.
Reported
Google Cloud launches Gemini Enterprise for Legal[5]
Google Cloud introduced Gemini Enterprise for Legal, an AI product for law firms and corporate legal departments that automates legal workflows such as contract review and regulatory compliance, connecting to document and matter management systems and legal industry platforms including Docusign, Everlaw, iManage, NetDocuments, RelativityOne, Thomson Reuters, Harvey, Legora and CourtListener.
Reported
Nvidia releases open-source AI model Nemotron 3.5 Lightning[6]
Nvidia released the open model Nemotron 3.5 Lightning, which the company says can run on a single GPU on a personal computer and is freely available to enterprises for download, use and modification without a license or fee. Nvidia says the lightweight model targets AI agent applications and can be deployed on PCs, workstations, data centers or cloud environments. Nvidia also released open-source software NeMo Switchyard to help enterprises select and combine AI models. Companies including CrowdStrike, CodeRabbit and Harvey have tested and customized the model for cybersecurity, legal services and code review.
Reported
FD Stonewater completes acquisition of Harvey | Harvey-Cleary headquarters[7]
FD Stonewater completed the acquisition of the Harvey | Harvey-Cleary headquarters, a 55,624-square-foot office building in Houston.
Sources8 sources
- 1Harvey (software)en.wikipedia.org
- 2Harvey AIharvey.ai
- 3谷歌云推出面向金融与法律行业的Gemini Enterprise解决方案techmoran.com
- 4谷歌推出面向法律行业的Gemini Enterprise for Legalabajournal.com
- 5谷歌云推出面向法律行业的Gemini Enterprisetimesofindia.indiatimes.com
- 6英伟达发布开源AI模型Nemotron 3.5 Lightningfinance.sina.com.cn
- 7FD Stonewater完成对Harvey | Harvey-Cleary总部物业的收购prweb.com
- 8英伟达推出首款开源AI模型finance.sina.com.cn
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