Lexroom Raises $50M to Fix Legal AI’s Hallucination Problem

Milan-based LegalTech startup Lexroom has raised over $50 million in a Series B funding round, bringing the total capital raised by the company — founded in 2023 — to more than $73 million. Lexroom develops AI infrastructure for lawyers operating within European civil law systems, built on a data-driven approach: rather than fine-tuning general language models, the startup relies on a proprietary database of more than six million verified legal sources. Left Lane Capital is leading the round, with participation from Base10 Partners, Eurazeo, Acurio Ventures, Entourage, and View Different. The platform now serves more than 8,000 law firms and legal departments as a daily research, drafting, and analysis tool. CEO Fois outlines the strategy: “When we started Lexroom, two things were immediately clear: lawyers needed a better way to work, and LLMs could deliver it. The missing piece was data — always-updated laws, relevant case law, and legal proceedings. Civil law countries need an AI legal engine that reasons data first.” Unlike many legal AI providers, Lexroom focuses not primarily on optimizing large language models, but on a proprietary foundation of verified legal sources. Lexroom grounds its approach in the significant reliability problems of conventional legal AI tools. The company states: “Most products were designed model-first: take a general-purpose LLM, fine-tune it, wrap it in a legal interface. The problem? Practising lawyers cannot verify it, cannot cite it, and increasingly will not use it. The risk is no longer theoretical: more than 1,300 court filings have been documented containing AI-generated hallucinations — fabricated citations, non-existent precedents, misquoted authorities.” Lexroom’s proprietary infrastructure consolidates statutes, court decisions, and regulatory content that is continuously updated and optimized for AI-assisted research. Every response can be traced directly back to its underlying sources. Usage figures reflect strong adoption: two-thirds of users are active daily, and 94 percent use the platform weekly. Research tasks that previously took hours are completed by the platform in minutes, according to the company — enabling law firms to serve more clients without compromising the quality of their legal work. With the fresh capital, Lexroom is now expanding into additional civil law jurisdictions across Europe. Germany and Spain are the first markets in line — the company plans to build local teams and develop jurisdiction-specific features in collaboration with local law firms. The strategy aims to provide tailored legal AI infrastructure for each civil law country. On data protection, Lexroom adheres to strict standards. The company is ISO 27001-certified and operates, according to its own statements, in compliance with the GDPR and the AI Act. Uploaded documents are encrypted and, according to Lexroom, are never used to train AI models. Lexroom does not store client documents permanently and relies on Single Sign-On (SSO) for secure access management. Security policies are publicly accessible — a key consideration for law firms handling sensitive client data.

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