Custom AI voice agents for the clients a template cannot serve
Custom AI voice agent development means building a phone or SMS agent around one client's own systems and rules, not a template. Impleko engineers the logic and integrations; your agency sells it under its own brand.
Some clients need more: a transfer to their own staff, a lookup in a system nobody has a connector for, a script with compliance rules. That is the work Impleko does.
Where custom starts
- Live call transfer to the client's own staff, with the caller's details passed along
- Lookups in client systems during the call: listings, records, inventory, balances
- Integrations with CRMs and booking tools that have no ready-made connector
- Regulated scripts with required disclosures and call logging
- Agents that hand off between voice, SMS and email
- Everything built in the client's own Retell, VAPI or LiveKit account, so nothing is locked to us
How is a custom AI voice agent built?
Every build starts with the client's call flow: who calls, what they need, where the answer lives and when a person should take over. We map that flow, write the agent's logic and prompts, and connect it to the systems it needs during the call, such as the client's CRM, calendar or records.
Then our testers run real calls against it, including the hard ones, before the client hears a word. The agent goes live in the client's own Retell, VAPI or LiveKit account, under your agency's brand, and a monthly managed plan keeps it monitored, tuned and fixed.
From brief to live agent
Send the brief: the client's goals, a call recording or a rough idea.
Get a fixed scope and wholesale quote within 48 hours.
We build the logic, prompts and integrations, with working demos on links that carry your logo.
Our testers run real calls before the client sees anything.
Launch in the client's own voice platform account, then monitoring and fixes on a monthly managed plan.
Template agent or custom build?
| Need | Template agent | Custom build |
|---|---|---|
| Call transfer | Generic call forwarding | Live transfer to the client's own staff, with the caller's details |
| Data during the call | A fixed script | Lookups in the client's own systems |
| Integrations | Ready-made connectors only | Custom code where no connector exists |
| Compliance | A standard script | Required disclosures and call logging |
| Where it runs | The vendor's account | The client's own Retell, VAPI or LiveKit account |
What agencies sell with a custom voice agent
- Answering and qualifying inbound calls, then booking into the client's calendar
- Handing qualified callers to the client's own team, mid-call
- Looking up listings, records, inventory or balances while the caller waits
- Following up by SMS or email after the call
- Running regulated scripts with disclosures and call logs
Proof
HeroFlow needed calls handed to each client's own team, so we wrote that transfer integration. No Better Balance needed integrations that did not exist off the shelf, so we built them per client.
Engagement model
Fixed wholesale quote per custom build, then a monthly managed fee per agent.
Questions agencies ask
What is custom AI voice agent development?
Custom AI voice agent development means building a phone or SMS agent around one client's own systems and rules instead of a template. Impleko engineers the call logic, integrations and testing, and your agency sells the agent under its own brand, built in the client's own Retell, VAPI or LiveKit account.
When does a client need a custom voice agent instead of a standard AI receptionist?
A client needs a custom agent when a standard receptionist can't do the job: transferring calls to its own staff, looking up records during a call, connecting to a CRM with no ready-made connector, or following a regulated script.
How long does it take to build a custom AI voice agent?
It depends on the scope. Impleko returns a fixed scope, wholesale price and delivery date within 48 hours of the brief, and the clock starts once scope is signed and it has access to the client's accounts. Published estimates elsewhere run from 4 weeks to 9 months for a build from scratch; Impleko starts from a standard agent and adds only the custom logic and integrations.
How much does a custom AI voice agent cost?
Impleko prices a custom voice agent as a fixed wholesale quote for the build plus a monthly managed fee per live agent, which covers monitoring, prompt tuning and fixes. You set the price your client pays.
Do you build on Retell AI, VAPI or LiveKit?
Yes. Impleko builds voice agents on Retell AI, VAPI and LiveKit, with Twilio for phone numbers and ElevenLabs for voices, and picks the platform that fits each client's call flow. The agent lives in the client's own account, so nothing is locked to Impleko.
Can an AI voice agent transfer calls to a real person?
Yes. Impleko builds live call transfer to the client's own staff and passes the caller's details along, so nobody has to ask twice. Impleko wrote this transfer for HeroFlow's clients because no off-the-shelf tool offered it.
Can the agent look up data in my client's systems during a call?
Yes. Impleko connects voice agents to the client's own systems so they can check listings, records, inventory or balances mid-call and answer with real data. That includes CRMs and booking tools that have no ready-made connector, which Impleko integrates through their APIs.
Services
- AI SaaS and MVP development
Web apps, client portals, dashboards and AI products
- GoHighLevel development
Custom API integrations, workflows, migrations and AI inside GHL
- Web and app development
AI-native websites and mobile apps
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