xAI Launches No-Code Voice Agent Builder with Grok Voice

xAI has released Voice Agent Builder, a beta no-code platform that lets users create and deploy human-like voice agents powered by Grok Voice in under two minutes.

Voice Agent Builder offers sub-second latency and broad language support. The platform delivers warm, expressive voices capable of real conversation timing, tone, and warmth rather than scripted phone-tree responses. It achieves sub-second latency, supports 25+ languages, and is priced at $0.05 per minute. A free phone number is provided or users can bring their own.

The service leads the Tau Voice Leaderboard with a Grok Voice Think Fast 1.0 score of 67.3 percent. That compares with Gemini 3.1 Flash Live at 43.8 percent and GPT Realtime 1.5 at 35.3 percent across overall, retail, airline, and telecom categories.

Grok Voice agents are trained to manage messy real-world calls. The agents handle interruptions, half-remembered order numbers, and additional requests while seeing every call through from greeting to resolution. They pull up records, check policy, and take action mid-conversation for use cases including support, sales, lead qualification, reception, and scheduling.

Agents maintain intelligence without sacrificing speed by delivering real reasoning and answers in under a second. They are trained on the hardest calls available and can clear through background noise and strong accents.

Integration with existing tools and enterprise compliance features are built in. Grok plugs directly into Gmail, Google Calendar, Outlook, Linear, Notion, OneDrive, and more to trigger workflows, schedule follow-ups, and send confirmations. Custom MCPs can be integrated for any internal system, database, CRM, or custom workflow. The platform supports direct SIP for major telephony providers, offers user-defined guardrails, and is SOC 2, HIPAA eligible, and GDPR compliant.

Users define agent behavior through simple instructions and knowledge bases. A playbook format lets users describe multi-step workflows such as greeting callers, looking up orders, resolving issues, and wrapping up with confirmation. Knowledge bases accept plain text, Markdown, and PDFs that the agent references during calls. Changes to instructions or documents update agent behavior instantly.

The builder includes a live preview where users can talk to the agent in the browser and hear updates in real time. Playback of any call is available from start to finish. Custom voices can be selected from a library of more than 80 built-in options across 25+ languages or cloned from two minutes of audio.