Antidote, an automated billing compliance platform for global law firms, has raised £3.5 million in a seed round led by Lakestar, with participation from Concept Ventures, The LegalTech Fund (TLTF), and a group of prominent industry angels. The funding follows a £1.5 million pre-seed round in 2025, bringing total funding raised to £5 million.
The new funding will be used to accelerate product development and support US expansion, building on adoption by leading law firms across the US, UK, and Australia.
Law firms face increasing pressure from clients to comply with complex Outside Counsel Guidelines (OCGs), while continuing to rely on manual, end-of-month review processes that lead to write-offs, rejected bills and strained client relationships. Current billing practices and OCG non-compliance result in 8–12% of billable hours being lost each year to write-offs and rejected invoices.
Antidote integrates with existing time-recording and practice management systems to read every time entry, check it against client OCGs and firm standards, and suggest compliant rewrites before a bill is sent. The platform is already being used globally by leading law firms across the US, UK, and Australia.
Antidote is headquartered in London and works with firms across the US, UK, and Australia.
