Our Results Your Growth Engine Process FAQ Book your retention audit
49.47° N / 8.66° E · Schriesheim
Champions League Retention Marketing for E-Commerce Brands

New customers keep costing more. We make them worth more.

In 90 days, email, WhatsApp and direct mail drive more repeat purchases, more margin and more cash flow for you - leaving you more budget for new customers.

The starting point: a data-driven audit that puts a number on the revenue your account is leaving on the table - before you pay anything.

Predictable
Cash Flow
Email WhatsApp Direct Mail
For our clients, we generateMORE THAN €0M in revenue.
On average, we achieve:
+0% growth in returning-customer revenue no client below +40%!
+€0 more monthly revenue no client below +€16,000!
0x ROI on your investment in us no client below 3x ROI!

Klaviyo Year in Review 2025

In 2025, our brands regularly ranked among the top Klaviyo brands worldwide.

Brands running our Retention Growth Engine
01 · THE PROBLEM

Predictable revenue from customers you've already paid for.

Rising acquisition costs squeeze your margin. Your cheapest revenue sits with the customers who already know you - as long as a system is in place to capture it.

CAC

Win back your margin

Every ad euro buys revenue at a higher price than the one before. Repeat purchases offset rising acquisition costs - and fund your ad spend instead of depending on it.

2ND PURCHASE

It all comes down to the second purchase

Whether a customer you paid a lot to acquire turns profitable is decided between the first and second purchase. Leave that step to chance, and you leave your most valuable revenue on the table.

FOCUS

Retention deserves an owner

Handled on the side, retention stays an afterthought: lots of data, no system, no testing. With a clear owner, it becomes a profit center of its own.

02 · RESULTS

This could be you. Real numbers from real cases.

Real figures straight from client accounts. No brand names, because client numbers stay confidential with us - and so will yours.

Every year, we take brands from 7-figure to 8-figure annual revenue. The audit shows you what your account is leaving on the table - before you pay anything.

03 · THE SOLUTION

Three channels.One system.Your cash flow.

Email

The core of your engine, on Klaviyo: flows along the customer lifecycle, campaign calendar, segmentation and A/B testing - all aimed at repeat purchases.

WhatsApp

The most direct line to your customers in the DACH region - set up in a legally sound way and orchestrated with email, so every message works toward the same goal.

Direct Mail

Physical mailings reach the segments that no longer respond digitally - as a targeted part of the same journey, not as wasted reach.

Our Retention Growth Engine turns your returning-customer revenue into predictable cash flow.

Cash flow retention means the revenue from your customer base helps fund new customer acquisition. You depend less on ad prices, free up liquidity for growth - and all your team has to do is approve.

We build on
Klaviyo Chatarmin charles
04 · OUR WORK

Here's what it looks like when it's done.

A selection from live campaigns and flows - every email in the brand's own voice, built for conversion, checked on mobile.

Campaign Crispy FantasyProduct Launch erlich textilCampaign HENSSLERSProduct Launch VLUVEducational Revolution TeaCampaign KrustenzauberCampaign Blue FarmCampaign erlich textilCampaign HENSSLERSCampaign paighPost-Purchase edubilyNurture Crispy FantasyAnniversary VLUVCampaign Revolution TeaCollection erlich textilCross-Sell HENSSLERS
05 · TESTIMONIALS

What our clients say. Their verdict, not ours.

Quotes translated from German.

“
The team didn't just bring structure, they really thought things through with us. New ideas that fit. Designs that work. And above all: honest feedback. Even a "That doesn't make sense the way it is" when one of us had a crazy idea. That's exactly what you need - not yes-men, but people who think things through with you as equals.
KS Kelly Sieker-TeunissenMarketing Manager, paigh · TAKE A SHOT · Timber&John
“
Both designs are incredibly good once again. I'm fascinated every time by how strongly the images tell and support each story, and how well the themes fit the season and the topics customers care about most. Hats off, and thank you for the great work.
MMichaFounder, KRUSTENZAUBER
“
We turned to TMC to have experts at our side for our first steps in email marketing. Together, we developed our strategic concept in 2 months, got hands-on support working with Klaviyo and built our first email flows together. Both strategically and operationally, we were super happy with the collaboration - truly competent partners I can recommend to anyone!
DSDominik SalfnerGrønenberg Coffee · Google review, 5.0 ★
“
What sets TMC apart from other agencies: they don't just look at CRM, they understand the full business model - margins, CAC, profitability, growth dynamics. TMC thinks in business outcomes, not tool features.
MS Mara SchmadtkeHead of CRM, Blue Farm
06 · PROCESS

From audit togrowth in 90 days.

07 · SERVICES

Done For You. From strategy to send.

08 · OUR TEAM = YOUR TEAM

A team of expertswho look after your brandas if it were their own.

Four account specialists with clearly defined roles, plus their operations manager: the perfect team for you.

  1. 01Retention Strategist - owns strategy, roadmap and data analysis.
  2. 02Brand Manager - your dedicated point of contact, responsible for customer insights, campaign calendar and copywriting.
  3. 03CRM Manager - makes sure everything is right with flows, segments, testing and QA.
  4. 04Designer - designs every email to look great in your style, built for conversion, mobile first.
  5. +Operations Manager - keeps everything running at all times and is your link on every topic.
09 · WHY IT WORKS

Not just campaigns,but a system.

A system from day one

No months of recruiting, no single point of failure: you get a well-oiled team covering strategy, copy, design and QA - ready from the start.

The whole revenue chain under one roof

Instead of send slots in a calendar: strategy, execution, quality control and reporting across all three channels - with one person accountable for the result.

DACH-native sells better

Built for the German-speaking market, not carried over from English. Communication that matches how your customers actually buy - in German and English.

Your data decides

Every initiative starts with a number from your account: cohorts, repurchase rates, customer lifetime value. We test continuously - gut feeling is not a lever.

10 · FAQ

The most common questions.The answers that matter.

Why do we need retention marketing - and why now?

Every customer you win through paid channels is getting more expensive. Through email, WhatsApp and direct mail, retention marketing makes sure these customers buy more often, stay longer and bring in more margin.

Because acquisition costs have inevitably been rising for years1, the value of a customer you've already won decides whether your brand can scale profitably.

The result is a growth engine that can scale independently of your ad budget and, in turn, supports new customer acquisition.

1 ProfitWell: acquisition costs up 222% in eight years. SimplicityDX (2022): brands lose USD 29 on average on every new customer they acquire.

Who is this for - and who is it not for?

For DTC brands in the DACH region with 7- to 8-figure annual revenue, a product portfolio that invites a second purchase, and owners & operators who understand how important retention is for their brand's growth.

Not a fit if you want to co-write copy and design yourselves, if your product has no real repeat-purchase logic, or if your list and revenue are still so small that a retention team cannot yet pay for itself. We'll tell you that straight in the audit - before you pay anything.

How much revenue should retention bring in?

The rule of thumb that 30 to 40% of revenue should come from email marketing is nonsense - our strongest clients are above that. Subscription brands are, of course, often far above it.

And most brands that come to us are at 10 to 15%. Usually because they're in a growth phase and generate most of their revenue from new customers.

The gap in between is what we work on. We quantify how big it is for you in the audit, using your own account data.

What makes you different from an email agency?

A typical email agency measures itself by open rates and campaign revenue. More emails = more revenue, until the list burns out. Strategy there means: a bit of content, then a discount code.

We build retention as a system: flows, campaigns and lifecycle segmentation work together, so every contact gets the right message at the right time. We don't measure ourselves by vanity metrics, but by contribution margin per customer.

Copy, design, QA, reporting - all from one team, all aimed at one goal: repurchase rate up, dependence on paid marketing down.

Shouldn't we hire someone in-house or bring in a freelancer?

One person on their own is not a system: a CRM manager is strategist, copywriter, designer and QA in one - and a single point of failure. Hiring takes months and carries risk, and in practice that person gets campaigns out the door, but never gets to the flows. They react instead of building a system. And when they quit, everything stops.

With us, a well-oiled team with clear roles is up and running from day one. That's not an experiment at your expense - it's a working system that delivers right away.

And afterwards, we're happy to help with hiring and the handover. Because we also believe brands should own their growth engine themselves - once it's running.

How do you measure success?

Not by open rates, but by what makes the difference for you:

  • Returning-customer revenue
  • Repurchase rates
  • Time to second purchase
  • Revenue per recipient
  • CLV/CAC ratio

These numbers show whether the system works - and they are in your reporting, so you can check the math yourself.

What happens in the first 90 days?

First, the audit: account setup, campaign and flow review, cohort analysis - and a number for how much revenue is lying idle. That becomes the prioritized roadmap, quick wins first.

Then operations: sharpen or build the core flows, set up segmentation, launch the campaign calendar - with a dedicated team from day one, a strategy call every two weeks and milestones for day 30, 60 and 90.

After 90 days, the system is in place, running and being built out further.

How quickly will we see results?

We quantify your potential upfront in the audit, so you get a realistic number instead of blanket promises.

The first levers typically take effect within the first four weeks, and the system is in place after 90 days.

How much effort does it take on our side?

2-4 hours per week.

You approve content and give input and feedback only where it's needed - we deliver everything else.

Including a strategy call every two weeks and proactive communication via Slack.

What does it cost us?

A fixed monthly price, no surprises. The amount depends on your setup and scope.

In the free audit, we first quantify the potential, so you can assess the ROI before you decide.

On average, our clients achieve a 14.9x return on their investment in us. And none of them is below 3x.

No "starting at" prices, no fine print, one clear number in the first call.

What legal specifics do we need to keep in mind in the DACH region?

The existing-customer exemption in Section 7(3) of the German Act Against Unfair Competition (UWG) lets you email existing customers about your own similar products even without explicit consent. Most people just forget that when you collected the address, you must have clearly told customers they can object at any time - and every email has to repeat that. But used correctly, it's the basis for a very large share of your returning-customer revenue. ☝🏾

In its ruling C-654/23 of November 13, 2025, the Court of Justice of the European Union (CJEU) read the EU rule behind this exemption (Article 13(2) of the ePrivacy Directive) more broadly: it also applies without a purchase, for example to a free registration with a commercial purpose. That may be the case when signing up gives the person something in return, such as a whitepaper or a user account - to be assessed case by case. But if you want to stay on the safe side: double opt-in remains the way to prove consent in a dispute.

Single or double opt-in, Section 7(3) UWG, CJEU C-654/23, GDPR-compliant processes: to us, these aren't foreign concepts but standard practice - and given the risks, not optional but a prerequisite. Across all channels. That's why we studied it.

Which platforms do you work with?

We work with what you already use. And we don't force anyone to use something they don't need or want, or that doesn't pay off.

We prefer Klaviyo, Omnisend or Drip as the core for email, Chatarmin or charles for WhatsApp, plus business intelligence, loyalty and subscription apps as you need them. It has to fit you.

Do you also offer consulting on its own?

Yes. For brands that have an in-house team and need strategic leadership.

We deliver the audit, roadmap, frameworks and ongoing sparring and leadership.

Important: consulting only works if things actually get implemented on your side. We don't make recommendations that go nowhere.

If you want a strategy plan that ends up gathering dust in a drawer, we're the wrong fit.

If you have a team that delivers but needs direction, we're exactly right for you.

How much revenue is sitting in your backend?

The audit puts a number on your gap before you've paid anything. Then you decide whether closing it is worth it.

Book your retention audit