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This guide takes you from a blank account to a live AI voice agent answering real calls. You will not write code, touch your PBX configuration, or switch carriers. Sculptor — VoiceInfra’s built-in AI builder — does most of the work. You describe what you want in plain language and it configures the agent, then shows you exactly what it changed before anything goes live.

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Before you start

  • Every account starts on a 14-day free trial. No credit card is required to sign up. See what’s included below.
  • You will choose a region for your account during signup. Your data stays there, and the region cannot be changed later, so pick the one closest to where you operate.
  • You will verify a phone number as part of setup. This is a one-time step that prevents spam and unlocks creating numbers and making calls.

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Step 1: Create your account

1

Go to the sign-up page

Open voiceinfra.ai/signup and choose how you would like to sign up — with Google, with Microsoft, or with your email address.
2

Confirm your email if you used email

Choosing Email sends you a sign-in link instead of asking for a password. There is no password to create at signup. The link works for 15 minutes; open it on the same device you started on.
3

Choose your region

You will be asked where we’ll store your data. Your account stays in that region and cannot be moved later.
4

Finish setting up

If you signed up with Google or Microsoft, you will be asked for your name and region. That is the whole form.

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Step 2: Verify your phone

The first time you enter your workspace, VoiceInfra asks you to verify your phone number before you can create agents and numbers of your own.
1

Enter your number

Pick your country and enter the number. A 6-digit code is sent by SMS, and codes expire after 15 minutes.
2

Enter the code

Type the code to complete verification. You can resend it, though there is a short cooldown between attempts.
Verification unlocks creating phone numbers and receiving inbound calls. To place outbound calls, you also need full account verification. If you were invited to someone else’s workspace, you can skip this step and join theirs.

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Step 3: Describe what you want to build

You land on the home page, which is Sculptor.
Hi, what are we building? Describe it and Sculptor will set it up — assistants, numbers, workflows, knowledge.
Type what you actually want, in your own words. For example:
  • “Set up a receptionist for a dental office that books appointments”
  • “Get me a US phone number and point it at my sales agent”
  • “Add our opening hours to the support assistant’s knowledge”
Press Enter to send. Sculptor reads your workspace, works out what is needed, and starts building. If your request is ambiguous it will ask a question first rather than guessing.
Sculptor is on every page. Press ⌘J (or Ctrl+J) to open it as a side panel, or open Sculptor from the sidebar for the full-page Studio. It knows which page you are on, so you can say things like “add a transfer step” while looking at a workflow.

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Step 4: Review what Sculptor built

Sculptor does not silently change your account. You will see it work — each action appears as a card in the conversation — and then one of two things happens:
  • A change needs approval. You get a diff showing every field that will change, with the old value struck through beside the new one. Choose Approve to apply it, or Reject to discard it.
  • A low-risk change applies automatically, with an Undo link in the conversation if you disagree.
Ask for adjustments in the same conversation — “make the greeting warmer” or “use a British voice”. Nothing reaches your callers until you publish, which is covered in step 7.

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Step 5: Give the agent a number

Your agent needs a phone number to answer calls. There are three ways, and Sculptor can do any of them for you if you ask:

Provision a number

Buy a number directly from VoiceInfra. Available in the US, Australia, and Singapore, ready in minutes.

Import your own

Bring numbers you already have on Twilio or Telnyx. No porting, no billing change.

Use a PBX extension

Register the agent as a SIP extension on 3CX, Yeastar, FreePBX, or any SIP-compatible PBX. One IP to whitelist.
You can also talk to your agent in the browser without any phone number at all, which is what step 6 uses.

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Step 6: Test it

Before sending real callers to your agent, talk to it.
  1. Open the agent and click Test Call. A call widget opens in the corner of the screen and connects you to your agent by voice.
  2. Speak to it exactly as a caller would. You can also see a live transcript and watch which tools it uses.
  3. Adjust the greeting, the instructions, or the knowledge base in the conversation with Sculptor, then test again.
Testing uses your draft. Live callers keep hearing the current published version until you publish — see Drafts, publishing and rollback.

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Step 7: Publish and go live

When you are happy with what you hear, publish the agent. From that moment:
  • Every inbound call to that number is answered by your agent, instantly, 24/7
  • Every call produces a recording, a transcript, and an AI summary in your call log
  • Analytics update in real time with volume, duration, and outcomes
  • Webhooks fire on call completion so your own systems stay in sync
Calls already in progress are not interrupted — they finish on the version they started on.

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What’s included

VoiceInfra is sold as a subscription. One monthly price covers the platform, and each plan includes a monthly allowance of: The difference between plans is scale, not features — every plan includes the full platform, the agent builder, all supported AI providers, PBX integration, and analytics. If you exceed your allowance, usage is billed at your plan’s overage rate. You can also turn overage off, which makes your allowance a hard cap so usage stops rather than costing more. Bring your own provider keys at any time if you would rather pay AI providers directly at their published rates.

See current plans and prices

Plan names, monthly allowances, and overage rates.

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What to do next

Start with a template

Industry templates for support, booking, and sales qualification.

Add your business knowledge

Upload documents or crawl your website so the agent answers from facts.

Connect your tools

Look up and update records mid-call with functions, MCP servers, and your CRM.
Your workspace also shows a Get started checklist with five steps: create an agent, add a knowledge base, connect a phone number, set up a webhook, and review your call analytics. It ticks itself off as you go, and disappears once the work is genuinely done.