Luminance, founded in 2015 in Cambridge, UK, was one of the first companies to apply machine learning specifically to legal contract work, well before the current wave of large-language-model-based legal AI platforms, and built a proprietary large language model called LLMX combined with a pattern-recognition engine trained on more than 150 million legal documents.
That earlier starting point and purpose-built model, rather than a general-purpose LLM wrapped in a legal interface, has reached genuine scale: more than 1,000 organizations across 70 countries use the platform as of May 2026, including all Big Four consultancies, more than a quarter of Global Top 100 law firms, and companies like AMD, BBC Studios, and Koch Industries.
The company reached a valuation exceeding $100 million after its Series B round. For a legal team that wants a purpose-built legal AI model trained specifically on legal documents at massive scale, rather than a general-purpose model adapted for legal work, Luminance's proprietary LLMX foundation addresses that directly.
