Use your own AI agent on your business number.

Bring the AI voice agent you already use on Vapi, Retell, or ElevenLabs. Choose which calls it answers, and other calls keep ringing your team.

Get my number See how it works ↓

Your own AI provider · Custom agents over SIP · Same business number

Choose which calls your own AI agent answers.

You set up each agent with your provider. Numberline sends it the calls you choose.

Qualify new sales inquiries

SalesLead qualification agent

Your agent asks callers what they need, where they are, their timing, and how to reach them.

Collect details before a consultation or estimate

New customersIntake agent

Your agent asks the questions you set up with your provider, in the order you choose.

Answer questions about hours, services & areas

General questionsInformation agent

Your agent answers from the business information you give your provider.

Cover calls when nobody can answer

No answer or after hoursReceptionist agent

Your agent picks up when your team is busy, or takes the after-hours route once you close.

Example: handling a new project inquiry

A remodeling company connects its own intake agent and sends Sales calls to it. Current customers press 2 and ring the office.

Agent Thanks for calling. What project are you thinking about?

Caller A kitchen remodel. New cabinets and counters, maybe the floor.

Agent Got it. What is the address, and when would you like the work to start?

Caller 14 Harbor Lane, sometime this spring.

Agent Thanks. When is a good time for an estimator to call you back?

Numberline keeps the call in your call history. What your agent collected stays with your AI provider.

Connect your provider. Choose your agent. Assign its calls.

Build the agent with your AI provider. Then connect it in the Numberline app.

Connect your AI provider

Choose your agent

Pick one of the agents in your provider account. Save it as a destination.

Assign its calls

Choose it for an extension, for calls your team misses, or for after hours.

Advanced setup: custom agents and SIP

Built your agent on another platform? Add it as a custom destination with the SIP address your platform provides. If your provider connects natively, start there. It handles the call setup for you.

Providers you can connect.

Connect your agents from Vapi, Retell, or ElevenLabs, or add a custom agent.

VapiNative connection

Build voice agents in your Vapi account with your own prompts and tools. Choose any of them as a Numberline destination.

RetellNative connection

Connect the agents in your Retell account for intake, qualification, and routine questions.

ElevenLabsNative connection

Connect the voice agents you built in ElevenLabs Agents. Assign them to the calls you choose.

Custom agentsSIP compatibility

An agent you host on another platform, added as a custom destination with its SIP address.

Your agents run on your provider account, and the provider bills you directly.

Learn how call forwarding, the WhatsApp inbox, and Slack notifications work. See how startups are adopting AI agents in our startup statistics.

Keep your business number as your setup changes.

Stays with you

Your business number, new or portedThe number on your website and cards stays the same.
Your greeting, extensions, and caller IDCallers get the same menu whether a person or your agent answers.
Your call history, texts, and voicemailsNumberline keeps the call information it records: who called, which extension, and where the call went.

Change any time

Who answers each extensionMove Sales from a person to your agent, or back, with one routing change.
Which agent, and from which providerSwap in another of your agents, or connect a second provider.
When it answersAlways, only when your team cannot answer, or only after hours.

What your agent says and collects on a call stays with your AI provider.

Learn how extensions and forwarding work.

Frequently asked questions

How does my own AI agent work with Numberline?

Numberline manages your business number, greeting, extensions, and call forwarding. You connect your AI provider, save your agent as a destination, and choose which calls it answers. Every other call keeps ringing the people you chose.

Where do I create and configure the agent?

With your own AI provider, such as Vapi, Retell, or ElevenLabs. The agent’s voice, script, questions, and business information live in your provider account. In Numberline, you choose which calls reach it.

Can my AI agent answer Sales while Support rings a person?

Yes. Each extension has its own destination. In the example on this page, Sales forwards to your New customer intake agent on Vapi. Support forwards to Sarah’s mobile.

Can I use the same agent on several extensions?

Yes. Save your agent once as a destination. Then select it on several extensions, several numbers, calls your team misses, or the after-hours route.

Which providers can I connect?

Vapi, Retell, and ElevenLabs connect natively. Sign in to your provider from Numberline and choose from the agents on your account. Agents built elsewhere connect as custom destinations over SIP.

Are AI-provider charges included?

No. Your AI provider bills you directly for its subscription and usage. Your Numberline subscription covers the number, extensions, and routing.