[AI Revolution](209) Mentat CEO Jusoo Kim: "Connecting Legal and Corporate Knowledge with AI... Providing Precise Answers"

Pilot Project for Document Drafting with AI: "Mentat AI"
Founded in September 2025, Secured Clients Including Bae, Kim & Lee
Developed "Nexus," a Platform Guiding Regulatory Decisions for Enterprises

"We are creating a platform that can answer questions by connecting company knowledge with the law. We've received feedback from lawyers describing it as 'disruptive.'

Kim Jusu, CEO of Mentat, is giving an interview to The Asia Business Daily. Photo by Dongju Yoon

Mentat is an artificial intelligence (AI) startup that operates services for regulated industries. The company has developed Nexus, a corporate AX (AI transformation) platform that integrates organizational knowledge with AI to provide employees with the information they seek. Since its founding in September last year, Mentat has secured 1.1 billion won in seed funding and acquired clients such as the law firm Bae, Kim & Lee. CEO Jusoo Kim, who was a founding member of HonestAI and led legal affairs and R&D, recognized the need for AI services tailored to legal work while preparing litigation materials for the previous company, which led him to start Mentat as a spin-off. On August 3, Kim explained, "I believed that if there were an AI agent capable of extracting the facts from thousands of pages of texts without missing any details, it could have a real impact on the legal market. That's why I decided to establish the company."

Mentat AI, which assists with document drafting—a core task for lawyers—was Mentat's initial pilot project. The service analyzes large volumes of case data in less than 90 seconds. When a lawyer provides the direction, the system analyzes the material and drafts the document. This service is available to any lawyer, and the official version is scheduled for release this month. Kim stated, "Mentat AI was planned as a legal tech startup's service aimed at producing results most similar to the real thing. We saw that lawyers devote a significant amount of time to drafting documents, and improving their productivity would require supporting this process."

While most companies use general-purpose AI such as ChatGPT or Claude for work, obtaining answers that take into account on-the-job risks, laws, and regulations remains difficult. Mentat bridges this gap. The company has developed Nexus, a platform that specializes its Retrieval-Augmented Generation (RAG) technology to meet legal and regulatory requirements by locating desired information in large natural language datasets. The platform connects a knowledge graph—combining laws, interpretations, and precedents—with corporate knowledge data so that the AI agent can deliver answers. Kim explained, "In regulated industries, it's impossible to do business without the law. Our platform enables intranet search functions—like Jarvis at a company—across vast amounts of legal, case law, and internal company data, providing precise and personalized answers much like a customized version of ChatGPT."

Kim Jusu, CEO of Mentat, is introducing the 'AI Legal Document Drafting Service for Lawyers' platform. Photo by Dongju Yoon

Mentat is expanding its corporate customer base by deploying its AI agent on proprietary servers, allowing use only within the client organization. It targets companies concerned about sharing their data with public AI platforms. Kim noted, "Even as OpenAI and Claude grow, what Mentat can and must protect is the ability to interface with a company's own knowledge at the infrastructure level. We intend to provide an AI service that connects to internal knowledge without any external communication, ensuring companies are not dependent on any single general-purpose AI and can build the right infrastructure for themselves."

Looking ahead, Kim plans to expand to more large enterprise clients and pursue overseas markets such as Japan. He said, "As AI technology improves, startups' mission is to support companies in leveraging their knowledge through large language models tailored to their needs. Our long-term goal is to have half of the major law firms as clients, and to enter countries such as Japan that share a continental legal system."

This content was produced with the assistance of AI translation services.