AI Tools Grok's Voice Agent Builder for Marketers: What to Delegate to a Talking Bot — and What to Keep Human xAI's Grok Voice Agent is a real-time WebSocket API with full-duplex audio, 100+ languages, and ~$0.05 per minute — built for marketers who want to automate the boring half of phone work without burning out their SDR team. 07/15/2026
