The UK's only authorised Synthesys partner.

The member of staff
that works every hour
you don't.

Mercurii deploys the same AI voice platform trusted by enterprises worldwide, configured for your business and live in five working days. Answers every call. Books every appointment. Follows up every lead. While your team sleeps.

30+ LANGUAGES GDPR COMPLIANT LIVE IN 5 DAYS
Built for Healthcare Legal Logistics Trades Real Estate Recruitment Fitness Financial Services Hospitality Professional Services
24/7
Always answering
30+
Languages supported
4.2×
Average client ROI
99.9%
Platform uptime
A typical Tuesday morning

While your team was in stand-up, your AI agent answered 142 calls in eleven languages, qualified 38 leads, booked 24 demos, and ran an outbound campaign across your dormant pipeline. You found out over coffee.

The opportunity

Every phone call is an opportunity.

The lead. The booking. The renewal. The customer ready to buy.

Until it isn't. Calls go to voicemail. Voicemails get ignored. Customers call a competitor. Revenue walks out the door.

Whether your business takes 50 calls a day or 50,000, the cost of unanswered ones compounds. Multiply by every weekend, every late night, every busy hour, every language you don't speak. The number is bigger than you think.

What if every call was answered? Every lead qualified before it reached your team. Every appointment booked directly into the right diary. Twenty four hours a day, in any language, at any volume.

Why Mercurii

Most AI voice products are a login and a wiki. Mercurii is a team.

Synthesys is the AI voice platform trusted by businesses worldwide. Sub-3-second answer times. Conversations indistinguishable from human. 30+ languages. Full enterprise compliance.

Mercurii is the UK's authorised Synthesys partner. We configure the agent around the way your business actually answers the phone. We integrate it with the tools you already pay for. We watch it. We retune it.

You get an AI voice operation, not a SaaS subscription. Built, deployed and supported. Live in five working days.

98%
Of inbound calls answered within 3 seconds, day or night.
4.2×
Average return on investment across AI voice deployments.
5 days
Average time from kick off to live, handling real calls.

Figures based on Synthesys AI platform case studies.

Trusted by operators

Results from the field.

Real businesses. Real numbers. Reported by the operators who run them.

Home Improvement
Solar, roofing, windows, HVAC
30sMedian speed-to-lead, down from 72 hours.
26%Lead-to-appointment conversion, up from 9%.
−34%Marketing CAC per appointment.
Trades & Construction
Outbound lead generation
18,000Automated outbound calls per month.
−43%Lower cost per completed inspection.
24/7Continuous outreach across the dormant book.
Healthcare
Clinic & practice operations
100%First-line enquiries fully automated.
9sMedian first-response time.
−38%Cost per booked appointment.
Financial Services
Lending, broking & advisory
34%Lead-to-call conversion, up from 12%.
31 daysAverage sales cycle, down from 90+.
−47%Reduction in customer acquisition cost.
What you get

Built for every conversation that drives revenue.

Inbound, outbound, sales, support. Mercurii handles every call your business needs to make and take.

Answer every inbound call

24/7 · 30+ languages

Your AI agent picks up within 3 seconds, around the clock, in the language the caller speaks. No queues. No voicemail. No missed leads.

Run outbound at scale

Thousands of calls in parallel

Reach prospects, customers, lapsed accounts at any volume. The AI qualifies, schedules, follows up, all concurrently. Your pipeline stays full without growing the team.

Book straight into your calendar

Sales calls · demos · consultations

Qualified appointments land directly in the right rep's calendar. Confirmation texts go out automatically. No human in the loop, no back and forth.

Re-engage your pipeline

Revenue from accounts you'd written off

Old quotes. Cold leads. Past customers. Your AI agent works through them all on autopilot, surfacing the warm ones to your team.

Reduce no-shows automatically

Fewer wasted slots

SMS confirmations and reminders go out automatically before every appointment. Higher show-rates with zero admin.

Full visibility, zero admin

Live dashboard · CRM in sync

Every call, lead and booking logged automatically. Plugs into the tools you already use, from spreadsheets to enterprise CRMs.

The process

From first ring to booked appointment. Fully automated.

01

We configure your AI agent

We build the voice, the scripts, the qualification flow and the integrations around your business and your sales process. Most clients are live within five working days.

02

AI answers every call instantly

Every inbound call is picked up within seconds, around the clock, in 30+ languages. Outbound campaigns run in parallel across thousands of contacts.

03

Leads are qualified and routed

The AI asks the right questions for your business. Every lead is scored, tagged, and routed to the right team or workflow before a human is involved.

04

Conversations convert

Qualified appointments hit your calendar. Pipeline updates land in your CRM. Your team spends its day on warm conversations and signed deals.

Live call · Mercurii AI
Outcome Appointment booked
Common questions

Common questions before you book.

Click the orb at the top of the page and hear for yourself. That's a real Mercurii AI agent handling a real conversation. It is natural, warm and conversational. The technology is built by Synthesys, the world's leading AI voice platform. Your customers won't know the difference. And in our experience, they care far more about being answered quickly than who's answering.
Yes. Synthesys connects to every major telephony provider and CRM out of the box. Twilio, RingCentral, Plivo, Vonage, 8x8, Salesforce, HubSpot and dozens more. If you already have a stack, we plug in. If you don't, we set it up. Either way you keep working in the tools your team already uses.
Mercurii pays for itself with the conversations you would have missed. Our clients average a 4.2× return on investment across deployments. Try the calculator to see the extra revenue and profit Synthesys delivers against your own numbers. We'll size the right deployment with you on a 30 minute call.
Yes. All AI interactions, call recordings, lead data and outbound activity are fully compliant with UK GDPR, ICO requirements, and Synthesys's enterprise compliance framework. Data stays on UK-aligned infrastructure. We also work with firms in regulated sectors — legal, financial services and healthcare — and configure disclosure, consent and call-handling rules to fit your obligations (SRA, FCA, CQC). Mercurii Edge Limited (trading as Mercurii) is a UK-registered company. We handle the compliance work so your team doesn't have to.
The agent handles the routine, high-volume calls — enquiries, qualification and booking — brilliantly. The moment a call needs a human, it routes straight to your team, with full context so the caller never has to repeat themselves. You set the rules: which calls escalate, when, and to whom. The AI never gets stuck pretending to be something it isn't.
What's included

A full AI voice operation. Not just a tool.

Every Mercurii deployment includes the platform, the build, the integrations, and the people who keep it working.

AI voice agent setup & configuration

Trained on your services, scripts and booking process

Included

Inbound call handling, 24/7/365

Every call answered, qualified and booked

24/7/365

Outbound calling at scale

Concurrent campaigns across leads, accounts, and dormant pipeline

Included

Lead scoring & qualification

Only warm, ready-to-buy leads reach you

Hours back / week

SMS confirmation & follow-up sequences

Reduces no-shows, keeps customers warm

Included

CRM integration & live dashboard

Full visibility on every call, lead and booking

Included

Custom scripts for your business

Configured to your services, not adapted from a generic template

Exclusive
MERCURII EDGE · POWERED BY SYNTHESYS

What are missed enquiries costing you?

Plug in your real numbers. See the lift Synthesys delivers when 20% more enquiries become won jobs.

Your numbers
£
30%
20%
Synthesys wins 20% more jobs → 14 jobs/mo (24% close)
What Synthesys gains you
Extra revenue recovered / year
£86,400
7,200 / month · 2 extra jobs won
Extra profit / year
£25,920
2,160 / month in margin
Before you go

Three reasons to move now.

Every unanswered call is revenue walking out the door

The lead that picked the competitor. The customer who didn't wait. The renewal that quietly lapsed. Multiplied by every day, every week, every year. The math doesn't get better with time.

We onboard a limited number of clients each month

Every Mercurii deployment is properly configured, tested and supported. We don't mass-onboard. If you're considering this, book a call sooner rather than later to secure a build slot.

Most clients are live within 5 working days

From the moment you come on board, we move fast. Your agent is built, tested and live quickly. Leads start flowing from day one.

Get started

Stop staffing the phones. Start scaling the conversations.

Book a free 30 minute demo. We'll size your call volume, show you exactly what your AI agent will sound like on day one, and walk through the build timeline.

Or hear it first. Tap the orb.

NO COMMITMENT. NO HARD SELL. JUST AN HONEST CONVERSATION.

Every day without this is another day of missed calls and lost pipeline. Your competitors are already automating.