Managed AI voice agents

Voice agents,
designed and run for you.

We design, build, test, launch, and improve your AI phone agents. Speech-to-speech reasoning, carrier-grade telephony, and weekly reviews from a London-based team — no platform for you to manage.

Book a call See how it works

Inside Convexa — our team's build view

studio.convexaai.com / agents / lumi-front-desk

Agents

Front desk
Sales callback
Reschedule flow
Voicemail drop

"Hi, I need to push my Tuesday 3pm back to 4."caller · 0:00

"Sure — Tuesday the 4th at 4 pm with Dr. Suri, confirmed."agent · 0:01.4 · 620 ms

"Can you also send me a text reminder?"caller · 0:03

"On it. Reminder set for Monday at 6 pm. Anything else?"agent · 0:03.6 · function: schedule_sms

The lifecycle

Designed, built,
and improved for you.

One team covers the whole agent lifecycle — no five-vendor handover between the first conversation and the first live call.

Design the flow

We map the call with you — branches, prompts, tools, and human hand-off — then write the script for your sign-off.

review workflow

Build on your data

We work from your past transcripts, FAQs, and edge-case calls, so the agent reflects your house style.

build

Test & launch

We stand up a staging number, run evaluation calls against your scripts, and only go live after your sign-off.

test & launch

Manage & improve

Our team monitors live calls, scores outcomes weekly, and refines the agent as your needs change.

ongoing

Capabilities

A voice model
that doesn't sound like one.

Convexa Voice Agents are built on a unified speech-to-speech model. No cascade of TTS + STT + LLM + glue. Less latency. More empathy. Fewer modes of failure.

Speech-to-speech reasoning

One model that hears, thinks, and speaks. Plans questions, asks clarifications, recovers from interruptions.

VOICE-2 · 7B params

Sub-second turn-taking

Median 620 ms end-to-end on the global edge. Faster than a human stops mid-sentence to think.

p50 · 620 ms

Natural barge-in

The agent stops talking when you do, no awkward 2-second tail. Resumes the right thought when you yield.

VAD-tuned

Function calling on the wire

Look up an order, write to your CRM, charge a card — agents run your APIs mid-call without dropping context.

200 calls / turn

40+ languages

Polish, Urdu, German, Bengali, Cantonese, Arabic and more. Switch mid-call without re-mounting the agent.

code-switching

Carrier-grade telephony

SIP, PSTN, WebRTC. Buy or port numbers in 24 countries. Built on five-nines carrier peering.

99.99% uptime

How we build your agent

Designed for
your business.

Every Convexa deployment is designed and operated by our team. You don’t pick up a toolkit — you get a working agent, tuned to your workflows and refined as it goes. It’s the same approach behind our AI appointment booking and lead qualification agents.

START

Greet caller

BRANCH

Reschedule

BRANCH

New booking

FUNCTION

schedule_appointment()

Designed by our team

Solutions engineers map the call flow, write the prompts, and tune the voice. You review and sign off before anything reaches a live caller.

See how we design agents

import { Convexa } from "@convexa/sdk";

const agent = convexa.agents.create(({
  name: "Lumi front desk",
  voice: "mira-warm-uk",
  language: "en-GB",
  prompt: "You book haircuts at Lumi…",
  tools: [scheduleAppt, sendSms],
});

// Attach to a phone number
await convexa.numbers.attach("+442046202661", agent);

from convexa import Convexa

agent = convexa.agents.create(
    name="Lumi front desk",
    voice="mira-warm-uk",
    language="en-GB",
    prompt="You book haircuts at Lumi…",
    tools=[schedule_appt, send_sms],
)

# Attach to a phone number
convexa.numbers.attach("+442046202661", agent)

Operated continuously

After launch, your solutions engineer reviews outcomes weekly, refines prompts, and ships improvements. You get a quarterly report on what changed and why.

See how we monitor live calls

The numbers

Holds up like infrastructure.

620 ms

Median end-to-end turn time

12,000

Concurrent calls per workspace

40 +

Languages with code-switching

99.99%

Carrier uptime (rolling 90d)

Built for the real world

Cross-talk. Hold music.
Toddlers. Bring it.

We build on the audio operators actually receive. The agent doesn't lose its place when a kid screams in the background or the caller drops onto speaker mid-sentence — the kind of reliability that matters for healthcare front desks and busy contact teams.

Polyphonic awareness

Distinguishes the primary speaker from TV in the background, baby on the lap, partner shouting from the kitchen.

Multi-turn recovery

If the caller drops mid-name or mid-number, the agent re-asks the missing piece without restarting the flow.

Warm hand-offs

When a human is needed, the agent dials in a teammate and stays on the line to introduce them with context.

In the real world

Answering calls
for teams like yours.

"We had a large backlog of voicemails sitting unanswered. Convexa caught up within a couple of weeks and now picks up live."

Operations lead

A UK logistics operator

"It's the first AI agent our nurses actively prefer to the answering service it replaced."

Clinical lead

A UK healthcare group

Plugs into the stack you already run.

100+ certified connectors. Our team handles the integration work as part of your deployment.

Salesforce

HubSpot

Zendesk

Intercom

Twilio

Genesys

Snowflake

Epic EHR

Cerner

Slack

Stripe

Notion

Browse all 100+ integrations

Discover more

Keep going.

Voice Agents is the foundation of the service. The capabilities below build on top of it.

human by design.

Talk to a solutions engineer about your first agent.

Book a call

Voice agents,
designed and run for you.

Designed, built,
and improved for you.

Design the flow

Build on your data

Test & launch

Manage & improve

A voice model
that doesn't sound like one.

Speech-to-speech reasoning

Sub-second turn-taking

Natural barge-in

Function calling on the wire

40+ languages

Carrier-grade telephony

Designed for
your business.

Designed by our team

Operated continuously

Holds up like infrastructure.

Cross-talk. Hold music.
Toddlers. Bring it.

Polyphonic awareness

Multi-turn recovery

Warm hand-offs

Answering calls
for teams like yours.

Plugs into the stack you already run.

Keep going.

Voice Studio

Live Inspector

Post-Call Analytics

Voice agents,designed and run for you.

Designed, built,and improved for you.

Design the flow

Build on your data

Test & launch

Manage & improve

A voice modelthat doesn't sound like one.

Speech-to-speech reasoning

Sub-second turn-taking

Natural barge-in

Function calling on the wire

40+ languages

Carrier-grade telephony

Designed foryour business.

Designed by our team

Operated continuously

Holds up like infrastructure.

Cross-talk. Hold music.Toddlers. Bring it.

Polyphonic awareness

Multi-turn recovery

Warm hand-offs

Answering callsfor teams like yours.

Plugs into the stack you already run.

Keep going.

Voice Studio

Live Inspector

Post-Call Analytics

Voice agents,
designed and run for you.

Designed, built,
and improved for you.

A voice model
that doesn't sound like one.

Designed for
your business.

Cross-talk. Hold music.
Toddlers. Bring it.

Answering calls
for teams like yours.