Antidote, an AI-powered billing compliance platform for global law firms, has raised fresh funding as it looks to reduce revenue leakage linked to manual invoicing checks.
The company secured $5m in a Seed round led by Lakestar, with participation from Concept Ventures, The LegalTech Fund (TLTF) and a group of industry angel investors.
Antidote is designed to help law firms manage the growing burden of Outside Counsel Guidelines (OCGs), which set detailed rules on how firms record time and prepare invoices for clients. Many firms still rely on manual, end-of-month reviews, a process that can lead to write-offs, rejected bills and strained client relationships.
Sitting on top of a firm’s existing time-recording and practice management tools, Antidote automatically reads every time entry, checks it against relevant client OCGs and internal standards, and suggests compliant rewrites before an invoice is issued. The company says this approach shifts compliance earlier in the billing workflow, aiming to prevent problems before they reach the client.
The new funding is intended to support Antidote’s next phase of growth as it scales its automated compliance capability across more firms and workflows.
The company also pointed to the scale of the problem it is targeting, saying OCG non-compliance and current billing practices can result in 8–12% of billable hours being lost each year through write-offs and rejected invoices.
Antidote said it has already integrated with major practice management and timekeeping systems and is being used by law firms across the US, UK and Australia, which it described as evidence of global demand for proactive billing compliance.
Antidote CEO Nicholas d’Adhemar said, “Law firm billing compliance is one of the biggest sources of revenue leakage inside firms, not to mention being a generally despised manual task that adds to client friction. We built Antidote to remove billing friction by automating compliance for law firms – removing the manual work and shifting compliance upstream, when the work is done, not when you’re trying to send out the bill.”
Lakestar venture partner Navid Meyer said, “Antidote is solving a deeply embedded and very expensive problem in the legal industry, and Nicholas brings rare credibility here. He’s lived the problem as both a lawyer and a private equity client and has already built and scaled legaltech startups into category-defining platforms for legal spend management. We’re backing Antidote because it combines a clear product advantage with a founder who has proven he can execute in this market.”
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