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RETENTION MARKETING AGENCY FOR ECOMMERCE BRANDS


Turn more first-time customers into customers who come back.


Getting a customer is one thing. Keeping them interested is another.

Letterbox helps founder-led, family-owned and women-owned ecommerce brands build stronger customer relationships through retention marketing strategies designed to increase repeat purchases, improve customer lifetime value and make more of the customers you've already worked hard to acquire.

SOUND FAMILIAR?


You're constantly chasing the next customer.

New customer acquisition is doing most of the heavy lifting while existing customers aren't being given enough reasons to return.


The customer journey has gaps.

Someone buys from you, receives a confirmation email and then... nothing particularly strategic happens afterwards.


Your channels aren't working together.

Email, SMS and other customer touchpoints exist, but there's no clear strategy connecting them into one experience.

What We Do

Keeping customers is more than sending a discount code.


Retention isn't about desperately trying to convince every customer to buy again.

It's about understanding your customer journey and creating relevant reasons for people to continue their relationship with your brand.


We look at the bigger picture — how your customers are acquired, what happens after they buy and where your marketing can do a better job of bringing them back.


Retention Strategy

A clearer plan for improving repeat purchases and making more of your existing customer base.


Customer Journey Optimisation

We identify gaps and opportunities across the customer experience, from first purchase through to long-term loyalty.


Email & SMS Marketing

Connected campaigns and communications designed to keep your brand relevant between purchases.


Lifecycle Automation

Strategic customer journeys that respond to behaviour and support customers at the right stages of their relationship with your brand.


Segmentation & Personalisation

More relevant communication based on customer behaviour, engagement and purchase history.

Your customers aren't just numbers on a dashboard.


Letterbox Media works with founder-led, family-owned and women-owned ecommerce brands that care about what they're building — and the people choosing to buy from them.


We don't see retention as simply another metric to improve.


It's about building a better relationship with the customers who have already trusted your brand enough to spend their money with you.


That means looking beyond individual campaigns and thinking about the full customer experience — with the strategy, stru

Children's Furniture Brand

How we transformed a children’s furniture brand from a basic Shopify email setup into a high-growth retention engine, resulting in a 1,900% increase in email-attributed revenue in just five months.

Luxury Pet Products Brand

Learn how we helped this pet product brand migrate to Klaviyo, 3x their email revenue, and capture over 1000+ new leads in just 90 days.

Nutritious Food Brand

See how in just 6 months, we helped this food brand generate £30.6K in email revenue—surpassing their entire 2024 total of £23.1K and growing their list by 241.46%.

Pregnancy & Women’s Wellness Brand

Explore how we rebuilt this women’s health brand’s email system from the ground up—fixing broken flows and boosting subscriber engagement by 3.81% in under 30 days.

Sustainable Undergarment Brand

Discover how we revamped email automations for this brand, driving a 1741% boost in subscribers and 121% revenue growth.

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