London-based AI LegalTech startup Antidote has raised £3.7 million in a seed funding round as it targets billing compliance.

Founded in 2024, the company helps law firms automate checks against complex outside counsel guidelines, which it says can lead to an 8–12% loss of billable hours each year due to non-compliance.

Its platform reads time entries, compares them with client requirements and firm standards, and suggests compliant rewrites before bills are submitted.

The round was led by Lakestar, with backing from Concept Ventures, The LegalTech Fund and angel investors.