Service
AI Voice Agent for UK Businesses: Calls Answered, Qualified and Followed Up
An AI voice agent talks to callers on the phone, in a natural voice, and acts on what they say. HAeX builds AI voice agents for UK businesses, with a UK phone number and a handover to a person when needed. This page covers voice beyond reception. For a front desk, see our AI Receptionist. Price is scoped on a call.
- The voice is built on ElevenLabs Agents.
- Your number is a UK number provided through Twilio.
- A caller can reach a person when they ask.
An AI voice agent is software that holds a phone conversation, understands what is said and does something about it. It can book, answer, note or pass the call on.
What is an AI voice agent?
It is different from the menu systems that say "press 1". It listens to ordinary speech. It is also different from a recording. It responds to what the caller says, within rules you approve.
What can it do on inbound calls?
It can answer every call, take messages, answer common questions and book appointments. It passes urgent or complex calls to a person.
Most firms start with out of hours calls and overflow, when the team is busy. For a front desk that answers every call, use the AI Receptionist. Use this page when the call has a more complex job, such as taking details for a quote or triaging a request. Try the Missed Call Revenue Calculator to see what missed calls cost you.
If you want a ready made phone setup for incoming calls, see our AI phone answering service.
What can it do on outbound calls?
It can ring people to confirm appointments, chase missing documents and follow up quotes. Each call has a clear reason and a way to stop.
Outbound calling has UK rules, covered below. We build in consent checks, call time limits and an opt out. We do not build cold calling for sales marketing.
Here is a worked example with assumed figures. It is not a client result.
What does a worked example look like?
Say a firm confirms 30 appointments a week by phone, at 4 minutes a call. That is 120 minutes, or 2 hours a week. A voice agent rings each client, confirms or moves the slot in your calendar, and sends a note on any problem. A person handles only the ones that need a conversation.
We can work through this with your own details on a free call.
How natural does it sound?
It sounds like a calm, clear person. It also says it is an AI assistant if anyone asks. We test the voice, the pauses and the wording with you before launch.
We do not quote accuracy figures, because they depend on your calls. Instead we run your own test calls and let you listen to the recordings. Accents, noise and unusual names are the hard cases, so we test those first.
What happens when it cannot help?
It takes the details, tells the caller what happens next and passes the call or a written summary to you. A caller can ask for a person at any point.
You choose who is called and when. Out of hours, the summary lands in your inbox and your CRM. Nothing is lost, and nobody is left on hold without a plan.
How does a project run, step by step?
It runs in four steps.
- 1
Discovery call (30 minutes)
You tell us which calls you want handled.
- 2
Audit and quote
We map the call flows, choose the number setup and quote in writing.
- 3
Build (2 to 6 weeks)
We build, test with real call scripts and let you listen to the results.
- 4
Run and improve
We review call logs with you and tune the wording.
Voice agents often need links to your software. See AI integration and CRM and sales automation.
UK GDPR covers call data. PECR, the Privacy and Electronic Communications Regulations, covers marketing calls, and the Telephone Preference Service applies to cold calls.
Which UK rules apply to AI calls?
Callers must be told when a call is recorded. Automated marketing calls need specific prior consent. See the ICO guide to direct marketing. Every build has a UK GDPR and data flow note, and a DPIA where needed. Health and legal firms get extra care; see dental practices and clinics. For policy help, see AI governance and compliance.
What does an AI voice agent cost, and how long does it take?
Price depends on the call flows, the connections and how many calls you take. We scope it on a free call and quote in writing before we build.
There are also usage costs from the voice and phone providers. We estimate those before you commit. Most builds take 2 to 6 weeks. This page sits under AI agents.
What is the next step?
Book a free call and tell us which calls you want handled. We will say whether a voice agent, the AI Receptionist or a person is the right answer.
Bring a few typical calls, written down or described. That is enough to start.
Questions that come up
Will callers know they are speaking to an AI?
It sounds natural, and it says it is an AI assistant if asked. We never design it to pretend to be a person.
Can it ring customers as well as answer?
Yes, for confirmed reasons such as appointment reminders. We build in consent, time limits and an opt out.
Do I keep my existing phone number?
Often yes, by forwarding calls. Otherwise we set up a new UK number through Twilio.
Can it speak other languages?
It can, but quality varies. We test the languages you need before we promise anything.
Can I read what was said?
Yes. Each call has a transcript and a summary that you can read.
How is this different from the AI Receptionist?
The AI Receptionist is a ready made front desk. A voice agent is built around a specific call job.
What happens on the call
- 1
You tell us which calls you want handled
- 2
We say whether a voice agent or the AI Receptionist fits
- 3
You leave with a short list of what to automate first and a rough idea of cost
Prefer to talk first? Ring 07435 708864.
What you now know
- What an AI voice agent is
- What it does on inbound calls
- What it does on outbound calls
- What a week looks like with and without it
- How natural it sounds
- What happens when it cannot help
- How a project runs
- Which UK rules apply
- What it costs and how long it takes
- Your next step
Talk through your calls
The first call is free. We say what a voice agent could handle on inbound and outbound calls.