PolyAI

London-based PolyAI builds human-like conversational voice agents that handle complex customer-service calls across multiple languages.

Unlike simple phone menus, its agents understand natural speech and resolve real issues, deployed through its Agent Studio platform. It serves enterprises across sectors with thousands of live voice deployments and has posted strong multi-year revenue growth.

Voice remains one of the hardest AI problems to get right, and PolyAI is among the European leaders.