AI Voice Agent Development

Custom AI Voice Agents, Built for Your Business

Your customers get a voice assistant that sounds human, handles conversations on its own, and plugs into the systems you already run. No generic script. Built around your business.

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voice-line · call handling

Today

Calls after hours

unanswered

Cost per call

$7-12, human handled

Lead follow-up

whenever someone gets to it

Calls and leads slip through

With your agent

Calls after hours

answered, any time

Cost per call

$0.40-0.80

Lead follow-up

fast and consistent

Every call answered

Same call volume. The gap is who, or what, picks up.

Built and Running Voice Agents Since 2013

50+

Certified AI Engineers

150+

Projects Shipped

Lumi

Our In-House Voice Agent

Our AI voice agent services

We Build the Whole Thing, Then Wire It Into Your Business

Speech recognition, natural-sounding replies, and the AI reasoning underneath it, so the agent gets work done instead of just answering FAQs.

Built from the ground upspeech recognition, text-to-speech, and the AI reasoning behind it, tuned to how your team talks

Conversation flow designthe agent remembers context, reads tone, and knows when to hand off rather than guess

Multi-language handlingdifferent regions and dialects accounted for, not bolted on later

What you get Custom Voice Agent built end to end, wired into your business

System integrationCRM, ERP, telephony, whatever runs your operations, so it can take real action

Industry-tuned languagetrained on your field so it doesn't sound like a generic assistant

Ongoing tuningengagement, accuracy, and task completion tracked and tuned after launch

Our innovation

Lumi, a Conversational AI Agent

We don't just build voice agents for clients. We run one ourselves. Lumi handles live conversations, connects to real databases, and can actually update records, not just look things up.

Follows the Conversation

Not just the keywords. Multi-turn, natural dialogue that stays on track without losing context.

Actually Does Things

Reschedules appointments, cancels orders, updates account details, all checked against your business rules.

Hands-Off Continuity

When it brings in a human, the full context comes with it. Nobody has to repeat themselves.

Security Isn't an Afterthought

Encrypted, scoped access, and no storing of sensitive data it doesn't need.

Plugs Into What You Already Run

Salesforce, HubSpot, ServiceNow, Oracle, SAP, AWS, and more.

Lumi's basically the proof that what we build actually holds up in the real world.

See Lumi in Action

Types of AI Voice Agents We Build

Every business calls for something different. Our custom AI agent development covers all of it.

Inbound Agents

Answer, resolve, and route calls.

Outbound Agents

Reminders, follow-ups, and surveys.

Booking Agents

Schedule and reschedule without a person involved.

Lead Qualification Agents

Sort and score who's worth a call back.

Enterprise-Grade Agents

Deep CRM and ERP integration.

White-Label Builds

For agencies that want to resell under their own name.

Not sure which type fits your business? Tell us what you're trying to solve, and we'll recommend the right build.

Find My Agent Type

Who Do We Build AI Voice Agents For

A 500-person company and a 5-person team don't need the same build. We shape it around where you actually are.

Enterprise & Mid-Market

Deep integration work and compliance handled properly from the start.

Agencies & SaaS Companies

A white-labeled agent they can put their own name on and resell.

Smaller, Growing Businesses

Something simpler and more affordable, mainly aimed at not losing calls they'd otherwise miss.

What Your AI Voice Agent Can Handle

It covers more ground than most people expect from a first conversation about this.

Picks up every call, 24/7, no hold music involved
Books, confirms, and reschedules appointments on its own
Qualifies leads and routes the good ones to your team
Runs reminder calls and follow-ups without anyone prompting it
Pulls FAQ answers straight from your knowledge base
Tracks tone and context across a longer, multi-turn conversation
Hands off to a real person when it needs to, and brings the full context with it

AI VOICE AGENT

"I've confirmed your slot for Thursday at 2 PM and updated your contact record."

Calendar Synced

KB Matched

CRM Updated

The Difference One Voice Agent Makes

Same business, same calls, very different outcome.

	Before	After
Calls After Hours	unanswered	answered, any time of day
Hold Queue	long, callers get annoyed	none, picks up right away
Cost Per Call	$7-12, human handled	$0.40-0.80
Booking, Reminders, FAQs	all done manually	run without manual work
Leads	sit before anyone reaches out	fast, consistent follow-up

Before Calls go unanswered after hours, long hold queues, $7-12 per call, everything handled manually, leads sit before anyone reaches out.

After Every call answered any time of day, $0.40-0.80 per call, booking and follow-up run without manual work, leads get a fast, consistent response.

Manual workload

~50% less

For your team, once the agent is live.

Calls resolved

~80%

Handled without a human ever stepping in.

Payback

Months

Not years, on most builds.

Figures reflect the scope of a typical engagement and industry-style estimates, not audited Concret.io client results.

Already have a voice agent, but it's not working the way it should? That's a consulting conversation, not a rebuild from scratch. Our AI consulting services start with figuring out exactly where it's breaking down.

Get a Free Consultation

Industries We Build AI Voice Agents For

We've built in industries that move fast and ones with strict rules to follow.

Healthcare

Patient scheduling, reminders, and support questions.

Finance

Banking inquiries, KYC checks, and customer support.

E-Commerce & Retail

Order tracking, recommendations, and customer service.

Telecom & Hospitality

Bookings, troubleshooting, and round-the-clock support.

Real Estate

Showing requests, tenant maintenance calls, and buyer or renter lead qualification around the clock.

How We Deliver Our AI Voice Agent

A staged process, so you know what's happening and when.

Discovery

We map your call volume, your systems, and what you're trying to fix.

Design

We plan out the conversation flows and how everything connects.

Build

The agent gets developed and wired into your systems.

Test

We check accuracy, tone, and the edge cases that always come up.

Launch

It goes live, with your team ready alongside it.

Optimize

We keep tuning it based on how real calls actually go.

Why Teams Choose Us as Their AI Voice Agent Agency

We build AI voice agents that survive real call volume, not just demos.

Deep integration work with your CRM, ERP, and EHR systems
Deploy in the cloud or on your own servers
A track record across enterprise, agency, and small business builds
Dedicated in-house certified AI engineers that will work with you
In the space of development since 2013

Compliance built in from day one

HIPAA GDPR OWASP FCA EU AI Act

Partnered with

Salesforce HubSpot Workato

Frequently Asked Questions

How Long Does It Take to Build a Custom AI Voice Agent?

Usually somewhere between 6 and 12 weeks, depending on how many systems we're connecting and how complicated the calls get.

How Much Does AI Voice Agent Development Cost?

It depends on scope. Most custom builds start in the low tens of thousands, and we'll walk through the actual number with you before you commit to anything.

Can It Integrate With Our CRM or EHR?

Yes. Whatever CRM, ERP, or EHR system you're already running, we connect to it.

Will It Sound Natural on the Phone?

Yes. We use voice engines that sound like an actual person, not a robot reading off a script.

Is It Compliant With HIPAA or GDPR?

Yes, and it's designed that way from the start rather than patched on afterward.

Can Agencies White-Label This?

Yes. Build it once, put your brand on it, resell it to your clients.

Ready to Build Your AI Voice Agent?

Talk to our team. We'll walk you through what a custom build would actually look like for your business.