Built for Ad & Social Media Agencies

At 43 Hours, Your Clients' Best
Leads Are Already Gone.
MangoTeq Sentinel Closes That Gap
In Under Five Minutes.

He'd already written the email to cancel the client. He never sent it.

Book a 15-Minute Walkthrough

Tom Whitfield has been running his agency in Leeds for six years. In March, he was four hours from cancelling a client relationship he'd spent eleven months building, because the client kept saying nothing was converting, while his dashboard showed the campaign performing exactly as planned.

He'd started writing the email. Then his phone buzzed: another agency owner had just booked £48,000 from three-year-old leads, using nothing but better follow-up. Tom didn't send the email.

He ran his own agency's enquiries through Sentinel first. Two weeks later, he sat down with the client and showed them a dashboard instead of a defence: every lead, every contact attempt, every outcome. The client asked if they could do the same for the last six months. Tom's been with that client ever since.

Tom isn't bad at his job. His campaigns performed throughout. He just couldn't see what happened after the lead hit the client's inbox.

A lead contacted within five minutes is 21 times more likely to qualify than one contacted after thirty. The average service business takes 43 hours.

Tom's data ended at the inbox. So does yours, until something closes the gap.

43 hrs
Average response time, already too slow to win the lead
21x
More likely to qualify with a sub-5-minute response
(MIT / InsideSales.com)
£16.8K
Typical annual profit lost per agency to preventable client churn

The Problem

Your Data Ends at the Inbox

You have complete visibility over everything you control: the campaign, the creative, the targeting, the cost per lead, the landing page conversion. All fine. You did your job.

What you can't show your client is what happened after the lead hit their inbox. That data lives in their CRM. Your data ends at the inbox.

So you defend the campaign. The client hears "it wasn't us." Which sounds like an excuse, even when it's the truth.

Month One // New client onboarded
Campaign live, leads flowing in
Cost per lead on target, click-through rate holding steady
Month Three // First doubts
Client says: "Nothing is converting"
Dashboard shows the campaign performing fine
7:30 PM // A lead comes in
Lead sits in a shared inbox, unanswered
Prospect books with a competitor twenty minutes later
Month Four // Notice given
Client ends the relationship
The campaign performed throughout. The problem was never the campaign.

Tom Ran Sentinel on His Own Leads First. Then Showed the Client the Data.

Sentinel is a fully managed lead response and follow-up service. It connects around your client's existing lead sources, CRM, and calendars, and responds to new enquiries within minutes.

The Solution

Every Lead Tracked. Every Outcome Visible. No Dashboard You Have to Defend.

Tom ran his own agency's enquiries through Sentinel for two weeks before he showed a client anything. When he sat down with that client, he didn't pitch. He opened a dashboard: every lead that came in, every contact attempt, every outcome. The client went quiet, then asked if they could do this for all their leads going back six months.

Sub-5-Minute Response Every client enquiry hears back before the prospect dials the next business on Google
Full Lead Visibility Every contact attempt and outcome logged, so the "bad leads" objection has no purchase
Done For You MangoTeq builds it and runs it. Nothing for your team or your client's team to manage
Automatic Follow-Up If the first message gets no reply, Sentinel keeps following up across every channel
Sentinel works around your client's existing CRM, calendar, and lead sources. Nothing changes for your client's team, and your agency keeps the relationship at every stage.

How It Works

Three steps. No disruption to your clients.

1

We Diagnose

We review the client's current lead flow and show you exactly where response delays are costing booked revenue.

2

We Deploy

Sentinel is built around the client's existing CRM and calendar. No software for them to install, no process to change.

3

We Protect

Every enquiry gets an instant response. Your agency gets the data. The client's conversion improves.

The Outcome

What Happens When the Results Compound

When follow-up is fixed, the client's conversion rate goes up, cost per customer drops, and return on ad spend improves. A growing client doesn't fire their agency. A growing client asks for more.

It's the same shift Tom saw when another agency owner messaged him about a £48,000 result from three-year-old leads. Same leads. Same prospects. The only variable was follow-up. Month four, instead of the notice call, the client asks what else you can do.

  • Leads contacted and followed up properly, so client conversion improves
  • Full visibility into every lead, so the "bad leads" objection has no purchase
  • Results improving month over month, so clients increase ad spend instead of reviewing the agency
  • The month-four churn call doesn't happen when the client's numbers are improving

Tom's dashboard answers the question now. Yours can too.

After Sentinel Deployment
Lead Response Time
<5 minutes
Down from 43-hour industry average
Follow-Up Consistency
100%
Every lead, every channel, every time
Client Retention
Protected
No disruption to your clients
"Most agencies we work with discover their churn isn't a campaign problem at all. It's how slowly their clients' leads get a reply. The campaigns were never the issue."
– MangoTeq Sentinel Deployment Team
£16.8K
Typical annual profit lost
to preventable client churn

Questions Agencies Ask Before They Commit

Straight answers to what agency owners ask us most.

Account managers handle follow-up during business hours. The hours nobody's covering... that's where the gap lives. Sentinel responds within minutes, any hour, every channel, without adding to anyone's plate.
No. The setup is the same whether you're running this for two clients or twenty. One short questionnaire, handled entirely by us from there. You don't need scale to need this. You just need leads that are currently going cold.
No. Every message goes out in your client's name, written the way that business actually talks. The lead never sees MangoTeq.
A notification tells someone a lead arrived. It doesn't contact them, follow up, or keep going until they book or say no. That's the part Sentinel actually does.
Worth checking before you take that at face value. Tom believed the same thing, right up until he ran the numbers. A lead that goes cold from delay looks exactly like a bad lead. You won't know which is which until something actually replies.
Pricing and terms get agreed on the call, once we've reviewed that client's lead volume and pipeline. And if we don't hit the agreed minimum of qualified conversations within 60–90 days... we keep working. No extra cost. Until we do.
It depends on the client's lead volume and deal value, so we work it out on the call. Pricing is performance-aligned in most cases. We go through the numbers together before anything is agreed.

Book a 15-Minute Walkthrough

Bring one campaign you're running to generate leads for your own agency. We'll walk through exactly how Sentinel handles those enquiries and what you'd expect to see over the first two weeks.

Book My 15-Minute Walkthrough
For agencies managing £10K+ per month in client ad spend.
£10K+ Monthly Ad Spend Done-For-You Deployment Profit Shared 60–90 Day Performance Guarantee
Book a 15-Minute Walkthrough