Antidote Raises $5 Million Seed Round to Automate Billing Compliance for Enterprise Law Firms

Antidote, an AI-powered automated billing compliance platform for global law firms, led by Nicholas d’Adhemar and Matt Lyons, has secured a $5 million Seed round led by Lakestar, with participation from Concept Ventures, The LegalTech Fund (TLTF), and a group of prominent industry angels. This follows the company’s earlier $2 million pre-seed round in 2025, bringing total funding raised to $7 million.  

Law firms face growing pressure to comply with complex Outside Counsel Guidelines (OCGs), yet many still rely on manual, end-of-month reviews that result in rejected invoices, write-offs, and strained client relationships. OCG non-compliance typically leads to 8–12% of billable hours being lost each year.

Antidote integrates with existing timekeeping and practice management systems to automatically review every time entry against client OCGs and firm standards, suggesting compliant rewrites before bills are submitted. The platform is already used by leading law firms across the US, UK, and Australia, demonstrating strong global demand for proactive billing compliance.

Nicholas d’Adhemar, Founder and CEO of Antidote, said billing compliance is one of the largest sources of revenue leakage for law firms and a widely disliked manual process that creates client friction. Antidote automates compliance at the point of time entry, eliminating manual reviews and reducing write-offs before bills are sent.

Navid Meyer, Venture Partner at Lakestar, said Antidote addresses a costly, deeply embedded problem in legal billing. He highlighted Nicholas’s firsthand experience as both a lawyer and private equity client, and his track record of building category-defining legaltech platforms, as key reasons for backing the company.