AI Voice Agents
Voice agents that handle real conversations — not scripted ones.
Built to qualify inbound leads, answer FAQs, route escalations and book appointments — in any language, on any line, 24/7. No menu trees. No “sorry, I didn’t understand.” Just conversations that move forward.
AI agent · Response 0.6s
Handling 2.5 million calls daily for 300+ companies
What they do
Three jobs AI Voice Agents do for you
Not a smarter IVR. A competent agent that covers, qualifies and resolves — call after call.
Cover the calls your team can’t
Peak hours, weekends, after-hours, surge moments — AI agents pick up where your team runs out. Every caller gets a real answer, not a hold tone. No abandoned calls, no callback queue.
Qualify before a human picks up
Inbound leads scored, intent classified, context gathered — before the call ever reaches a person. Your team only takes the calls worth taking; the rest are handled, routed or booked automatically.
Resolve, don’t just route
Most inbound calls don’t need a human — they need an answer. AI agents handle the simple ones end to end: FAQs, bookings, status checks, ticket creation. No transfer, no escalation, no callback.
Anatomy of an AI phone call — from first ring to qualified lead
01Incoming call
A customer dials in — Callr answers instantly.
Every call, answered on the first ring.
No hold music, no missed leads. Watch what happens the moment a customer calls in.
02Speech to text
Every word transcribed in real time.
Live transcript
Transcribing · English
Caller
Hi — we’re a 50-person agency looking to switch phone systems this quarter.
03Understand intent
Callr extracts what the caller actually wants.
Understanding
Hi — we’re a 50-person agency looking to switch phone systems this quarter.
Intent
New lead
Company
50 people
Need
Phone system
Timeline
This quarter
04Qualify & route
It scores the lead and routes it — instantly.
Northwind Design
Agency · 50 staff
- Company size
- 50 people
- Need
- Phone system
- Timeline
- This quarter
Actions taken
Qualified as a sales lead
Budget, authority, need, timeline
Lead score: 88 / 100
High intent · strong fit
Booked a discovery call
Thu, Jun 18 · 2:00 PM
Logged to CRM & routed
Assigned to Priya · Sales
05Call summary
The whole call, wrapped up and logged.
Call summary
Qualified by AILead qualified
Duration
1:38
Lead score
88/100
Fit
Strong
Key points
- Inbound lead — 50-person agency seeking a new phone system.
- Qualified on budget and timeline (this quarter).
- Discovery call booked Thu 2 PM; routed to Priya in Sales.
Real conversations
Built for real conversations, not decision trees.
Sub-second latency. Interruptions and backchannels handled in real time. Context preserved across multi-step requests. Live tool calling against your CRM, calendar or backend — not a pre-rendered script. The agent adapts like a person on the line, not a chatbot.
Answers in under a second
End-to-end latency below one second, so the agent replies like a person — no dead air, no robotic pauses.
Handles interruptions
Barge-in and backchannels in real time. Callers cut in, change their mind, talk over the agent — and it keeps up.
Calls your tools live
The agent acts on live data mid-conversation — calling your tools instead of reciting a fixed tree.
0.7s
Avg. response
Handled
Barge-in
Live
Tool calls
In this call
- Caller interrupted — agent yielded instantly
- crm.lookup → account matched
- Context carried across 4 turns
Call language
Caller
Agent
Multilingual
The same agent, in every language.
30+ languages, handled natively. No separate agent per market, no translation layer — the same agent takes your French calls, your Spanish calls and your German calls, each in fluent, native-sounding speech.
Get started for freeOne agent, every market
Add a new market without building or maintaining a separate agent for it.
Sounds native, every time
Fluent, natural speech in each supported language — accent and idioms included, not a robotic translation.
End to end
Reads your CRM. Writes to your helpdesk. Books your calendar.
When a call needs an action, the agent takes it. It looks up the account, answers from your knowledge base, books the appointment and creates the ticket — leaving a clean record behind every call.
Answers, end to end
FAQs, order status, opening hours, account questions — resolved on the call, grounded in your own knowledge base.
Books and reschedules
Checks real availability and books, moves or cancels appointments straight into your calendar.
Writes back to your stack
Creates the ticket, updates the CRM, fires the webhook — through Callr’s REST API and webhooks, with no manual logging.
- AppointmentThu, 2:00 pm
- CRMContact updated
- Ticket#4827 created
Closed without a human · 02:41
220+
countries
2.5M
calls / day
<1s
response
Call answered
Picked up on the first ring — nobody left waiting in a queue.
Scale & reliability
Always on, on the network we own.
AI agents run on the carrier network Callr operates rather than resells — numbers live in 220+ countries, with millions of calls handled every day for hundreds of companies.
Get started for freeUp whenever you are
Carrier-grade uptime on infrastructure Callr runs end to end — the line answers at 3 a.m. or in a traffic spike, the same way.
Proven at volume
Over 2.5 million calls a day for 300+ companies, on infrastructure Callr owns end to end.
Your model
Bring your own AI model.
Callr works with any public or private AI model — GPT, Claude, Mistral, Llama, Gemini, or your own self-hosted stack. Keep your model, your prompts and your data exactly where you want them.
Get started for free
GPT
Claude
Mistral
Llama
GeminiWhat our customers said
“Callr has grown our brand awareness and built real trust with our clients.”
Dassin Bidouzo
Chief Digital Officer, Bien’Ici
“We’ve worked with Callr from the beginning and grown together. Their responsiveness and an API that keeps evolving make all the difference.”
Yannick Fauchille
Co-founder & Business Lead
“We prove ROI to our clients easily, without digging through data sources by hand.”
Julien Balmont
Co-founder & CTO, Zenchef
Discover how Callr turns every call into a booking, a qualified lead or a closed ticket
From the first ring to the booked appointment, put your calls to work across support, sales and operations.
Customer experience
Automatically engage every caller — answer, route and resolve when and how they need it.
Learn more →Data Intelligence
See why people call — intent, sentiment and topics scored automatically on every conversation and pushed to your stack.
Learn more →Sales enablement
Qualify, enrich and route inbound callers so your sales team closes more — on Callr’s API.
Learn more →