What is xAI Voice Agent Builder?
No-code phone agents on Grok Voice with tools and knowledge bases.
Who is xAI Voice Agent Builder best for?
xAI Voice Agent Builder is best for support and sales teams that want a phone agent running without code.
Phone support lines
Agents answer on the included number or an existing one connected over SIP, and can transfer the caller to a person when needed.
Bookings and order calls
Connectors and API tools let the agent book slots in Google Calendar or Outlook, check an order or issue a refund during the call.
Teams without voice engineers
You describe the call flow in plain language and attach documents, tools and guardrails, instead of wiring speech-to-text, a model and text-to-speech together.
Callers in many languages
xAI says Grok Voice was trained on noisy, real phone calls in more than 25 languages.
How much does xAI Voice Agent Builder cost?
xAI Voice Agent Builder has no platform fee: agents are billed at the Grok Voice API rate of $0.08 per minute of audio, plus $0.01 per minute for telephony on the free phone number each account gets.
- Speech to speech on Grok Voice
- Built-in voices included, no platform fee
- $4.80 per hour of audio
Calls on the free phone number that comes with each account add $0.01 a minute for telephony, so a phone call costs $0.09 a minute in all. Text sent to the agent costs $0.004 per text input. Usage comes out of API credits you buy in advance, and monthly invoicing is available on request. Prices are in US dollars. Full pricing on docs.x.ai. We checked these prices on .
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What are the best xAI Voice Agent Builder alternatives?
Two tools on Recaply do xAI Voice Agent Builder's job.
Questions about xAI Voice Agent Builder
What is xAI Voice Agent Builder?
No-code phone agents on Grok Voice with tools and knowledge bases.
Who is xAI Voice Agent Builder for?
xAI Voice Agent Builder is best for support and sales teams that want a phone agent running without code.
Is xAI Voice Agent Builder free?
No. Building an agent has no platform fee and each account gets a free phone number, but agent audio is billed from prepaid xAI API credits at $0.08 a minute, plus $0.01 a minute for telephony on that number.
How much does xAI Voice Agent Builder cost?
xAI Voice Agent Builder's paid plans are Agent at $0.08 per minute of audio.
What are the best xAI Voice Agent Builder alternatives?
The closest alternatives on Recaply are Thoughtly and Bland AI.
Where can I try xAI Voice Agent Builder?
On its official website, x.ai.
Can I keep my existing phone number with an xAI voice agent?
Yes. Direct SIP connects a number from any major telephony provider, so you do not have to switch to the number xAI provides. You can also connect your own app over WebSocket or test the agent in the browser without a phone.
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