Best AI Voice Agent Platforms for CX & DTC Brands (2026 Guide)

TL;DR Summary Enterprise platforms PolyAI, Cognigy, and Talkdesk require minimum $150,000 annual contracts, resulting in the highest documented resolution rates across the category. Advertised per-minute rates range from $0.05 to $0.13, but BYOK platforms cost two to three times more once separate LLM and TTS contracts are added. Gartner projects agentic AI will autonomously resolve 80% of common customer service issues without human intervention by 2029, accelerating enterprise platform investment.