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LegalOn Technologies

Category: AI in Legal

An AI-powered contract review and negotiation platform designed to help legal teams draft, review, and manage contracts more efficiently and accurately. LegalOn Technologies was founded in 2017. The company is led by Daniel Lewis. Based in Tokyo, Japan; San Francisco, USA. Team size: 501-1000. Total funding raised: $200 million. Latest round: Series E. Key investors include Goldman Sachs, SoftBank Vision Fund, Sequoia Capital, JAFCO, World Innovation Lab (WiL).

Founded
2017
Headquarters
Tokyo, Japan; San Francisco, USA
Team size
501-1000
Total funding
$200 million

Value proposition

To help legal professionals accelerate contract review and negotiation by up to 85%, reduce risks by identifying ambiguous or unfavorable terms, and ensure compliance with company standards, ultimately allowing them to finalize better contracts faster.

Products and solutions

AI Contract Review Platform: Core software that uses AI to analyze legal documents., AI Revise: A generative AI tool for suggesting and making sophisticated contract revisions in seconds., My Playbooks: A feature that allows legal teams to customize the AI to review contracts based on their own specific standards and preferred language., Matter Management: An expansion of the platform to manage legal matters beyond contract review., Microsoft Word Integration: A plugin that allows users to access LegalOn's tools directly within Microsoft Word.

Unique value

LegalOn's key differentiator is its hybrid approach, combining proprietary AI models, which are purpose-built for contract review, with practical legal guidance and content created and curated by experienced attorneys. This ensures that the AI's suggestions are not just algorithmically generated but also grounded in real-world legal practice.

Target customer

In-house legal teams and law firms of various sizes.

Industries served

Technology, Finance, Manufacturing, Retail, Healthcare, Real Estate, Professional Services

Technology advantage

The core advantage is the combination of advanced AI technology, including their own models and the use of large language models like OpenAI's, with a deep repository of expert legal knowledge. This creates a specialized, highly relevant tool that goes beyond generic AI capabilities. Their platform's ability to be customized with client-specific 'Playbooks' provides a significant advantage by adapting to each organization's unique risk tolerance and negotiation strategies.

How they differentiate

LegalOn differentiates itself by combining advanced AI technology with a team of in-house legal experts to create practical and reliable solutions. This human-in-the-loop approach ensures the quality and accuracy of its contract review services. The company also has a strong global presence, with dual headquarters in Tokyo and San Francisco, allowing it to cater to both Asian and North American markets effectively.

Main competitors

Luminance, Ironclad, SpotDraft

Key partnerships

Docusign: A partnership to streamline the entire agreement lifecycle, from review to signature., Microsoft: Integration with Microsoft Word to allow lawyers to work within their existing workflows., OpenAI: Utilization of OpenAI's technology to enhance and accelerate their legal AI capabilities., Viva Technology: Listed as a partner, indicating collaboration within the European tech ecosystem.

Notable customers

In Japan, LegalOn serves 25% of the nation's public companies and 87% of its Fortune 500 companies, including 40 global Fortune 500 firms.

Major milestones

Closed a $50 million Series E funding round led by Goldman Sachs in July 2025., Expanded its partnership with OpenAI to develop advanced AI agents for legal workflows., Surpassed 7,000 customers globally, demonstrating rapid market adoption and growth.

Growth metrics

LegalOn supports over 7,000 customers globally, representing a 40% increase year-over-year.

Market positioning

LegalOn is positioned as a global leader in the AI-powered contract review market. It targets a wide range of customers, from large enterprises to law firms, and has a particularly strong foothold in the Japanese market, where it serves a significant portion of public and Fortune 500 companies. The company's substantial funding and partnerships with major tech players like OpenAI solidify its competitive position.

Geographic focus

LegalOn has a strong focus on both the Japanese and U.S. markets, with headquarters in Tokyo and San Francisco. The company is actively expanding its global operations, with a growing customer base in the UK and other regions.

Patents and IP

Information on specific patents is not publicly available in the provided search results.

About Daniel Lewis

Former corporate lawyer and leader at LexisNexis, where he led the US practical guidance business. He joined LegalOn to spearhead its global expansion.

Official website: