With the new funding, Antidote will advance its AI billing compliance platform, expand in the US, and scale adoption among law firms by automating real-time compliance and reducing billing friction.
Antidote, a provider of AI-based billing compliance software for global law firms, has raised $5 million in a seed funding round led by Lakestar, with participation from Concept Ventures, The LegalTech Fund, and industry angel investors. The round follows a $2 million pre-seed raise in 2025, bringing total funding to $7 million.
Law firms face increasing pressure to comply with complex Outside Counsel Guidelines (OCGs) while often relying on manual, end-of-month billing reviews that can result in write-offs, rejected invoices, and strained client relationships. Current billing practices and OCG non‑compliance lead to 8–12 per cent of billable hours lost to non-compliance write-offs and rejected invoices every year.
Antidote addresses these challenges by integrating with existing time-recording and practice management systems to review time entries in real time. The AI-powered platform checks entries against client OCGs and internal firm standards, flags potential issues, and suggests compliant revisions before invoices are submitted.
Nicholas d’Adhemar, founder and CEO of Antidote, said the company was created in response to persistent revenue leakage caused by manual billing compliance processes in law firms:
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.
Antidote is already used by law firms across the US, UK, and Australia, reflecting demand for a more proactive and automated approach to billing compliance.
The new funding will support Antidote’s next phase of growth, with a focus on advancing its AI-powered billing compliance platform and expanding its presence in the US.
The company plans to further develop its product capabilities, deepen integrations with legal practice and timekeeping systems, and scale adoption among law firms seeking to reduce billing friction and revenue leakage through real-time, automated compliance.