Luminance vs Relativity
Side-by-side comparison of AI visibility scores, market position, and capabilities
Luminance is an AI legal platform using large language models to read, understand, and negotiate contracts, serving law firms and corporate legal teams globally.
About
Luminance is an AI legal technology company founded in 2016 in Cambridge, UK by mathematicians from the University of Cambridge, and has raised over $100M to develop AI that reads, understands, and negotiates legal documents. The company's platform uses proprietary large language models trained specifically on legal data to analyze contracts, identify risks, compare documents against playbooks, and now negotiate changes through its Autopilot feature that can conduct contract negotiations end-to-end with minimal human oversight. Luminance serves both law firms and in-house corporate legal teams, offering tools for due diligence, contract review, regulatory compliance, and NDA management. The company has customers in over 70 countries and processes millions of legal documents across financial transactions, M&A due diligence, and commercial contracting. Luminance positions itself as legal AI that truly understands law rather than pattern-matching on text, drawing on its Cambridge mathematics heritage to develop AI with deeper semantic understanding of legal language and concepts. The platform has become particularly prominent in financial services and real estate transactions requiring large-scale document review.
Relativity confidentially filed for IPO in early 2026, the first legal tech company to do so since 2021, while rebranding as a legal data intelligence platform.
About
Relativity was founded in 2001 in Chicago by Andrew Sieja (originally as kCura) and rebranded under its current name in 2017 after its eponymous e-discovery platform became the industry standard. The company serves over 300,000 users in approximately 40 countries, including 198 of the Am Law 200 law firms and the U.S. Department of Justice, processing over 145 billion files through its cloud platform RelativityOne. Valued at $3.6 billion following a 2023 investment round, it plans to invest more than $170 million in R&D in 2025.
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