LSG (Legal Solutions Group) is a US-based provider of legal operations software and outsourced legal support services for insurers, third-party administrators, self-insured organizations, and corporate legal departments. Its Mercury ELM platform is a cloud enterprise legal management system covering matter, document, litigation, claims and panel-counsel management, along with budgeting, billing and analytics. LSG also offers Quark, an AI engine for legal invoice review and billing compliance, alongside human-delivered legal bill review and legal practice management outsourcing.