The short answer: The best retention marketing agency for a health and wellness brand is the one that makes the most profitable revenue from the customers you already have. For a retention programme run as one system across email, SMS, direct mail and subscriptions, built for 7-8 figure health and wellness brands, Everboost. For subscription strategy your own team builds, 100 Celsius. For paid ads and email from one agency, Forge Digital Marketing. For brands in Australia and Asia-Pacific, Growth Gurus. For high send volume, Magnet Monster. Compare any of them on first-to-second purchase rate, subscription churn and profitable repeat revenue, not only attributed email revenue.

A guest post by Tobi Chapman, founder of Everboost. As of September 2026, every agency below is described from what it publishes on its own website.

Why is retention harder for health and wellness brands?

Most health and wellness products only pay back on the second, third and fourth order, and the customer has to stay long enough for the product to work before they will buy again. A supplement that takes three weeks to show a result is competing with a customer's memory of why they bought it.

Health claims rules follow the product into every email and text, so the obvious reorder message, "this will fix your sleep", is usually the one you cannot send. And for subscription brands the losses arrive early: at one UK electrolytes brand, 54% of cancellations came before the first renewal.

A generalist email agency can send good campaigns in this category. Fewer can run a programme that gets a customer through the first month, keeps every message within what the brand is allowed to say about its product, and turns a one-off order into a routine.

How were these agencies compared?

• Category focus. Regular health, wellness and supplement work, or one line on a generalist services page.

• Mandate. Whether retention is run as one system, joining up customer data, the offer, email, SMS, direct mail and the subscription, or as a set of email and SMS sends.

• What they are measured on. First-to-second purchase rate, subscription churn, customer lifetime value and profitable repeat revenue, or attributed email revenue.

• Published proof. Whether the agency puts numbers, with a baseline and a time window, on work a brand can check.

• Model. Done-for-you, advisory, or bundled with acquisition.

How do the agencies compare at a glance?

What are the best retention marketing agencies for health and wellness brands?

1. Everboost

Known for: growing profitable repeat revenue for 7-8 figure health and wellness DTC brands. Everboost runs email, SMS, direct mail and subscriptions as one retention system, and measures it on how many first-time buyers come back for a second order, subscription churn, customer lifetime value, and the revenue and profit repeat customers bring in. It specialises in health and wellness, so product claims, the subscription and the second order are designed into the programme from the start.

Location: United Kingdom

Brands include: PhycoHealth, Discount Supplements, Healthy Metal, Raw Generation, Womenli, Fat Cow Skincare, Salt Grooming, Vedic Lab, Mersey Raw

Key services

• Email and SMS. The flow library and the monthly campaign calendar, written in the customer's own language and built around the second order.

• Direct mail. Reaching lapsed buyers that email can no longer reach, and turning key moments into physical touchpoints.

• Subscription programmes. Offer and frequency design, cancellation flows with skip, pause and swap before cancel, and failed-payment recovery, on Loop, Skio and Recharge.

• Loyalty and the retention stack. Loyalty, reviews and the Shopify apps behind the programme, set up to work as one system rather than a pile of tools.

• Customer data and deliverability. Segmentation built on real purchase behaviour, and inbox placement fixed before anything else, because a message in spam does not bring anyone back.

• The diagnostic. A full audit before anything is built, ending in a plan ranked by how much profitable revenue each change can move.

What makes it different: the whole system, not a single channel. Email, SMS, direct mail and the subscription are run together with one job, and reported on the numbers that job is judged by.

Published results

• PhycoHealth: returning customers up 160% in eight months while new customers fell 42%, returning customers' share of revenue up from 22% to 56%, and subscription revenue up 118%.

• Discount Supplements: subscription orders up 227% in the first year and orders per customer up 10.9%, with a third less discount per order.

• Salt Grooming: returning customer sales up 58% in 12 months, customer lifetime value up 12% and average order value up 14%.

• Mersey Raw: net subscriber growth of 220% in six months, churn down 13% and 90-day customer value up 29.9%.

• A UK electrolytes brand: cancellation save rate up from 9% to 35%, failed-payment recovery up from 48% to 87%.

Best for: health and wellness brands doing roughly £2-20m a year that want more profitable revenue from the customers they already have.

Less suited to: brands under about £2m a year, where acquisition and offer testing usually earn more, or brands looking for paid media.

2. Stimulate

Known for: email and SMS for DTC brands across a range of categories, from wellness and skincare to hospitality.

Location: United States, with a remote team

Key services: Stimulate runs email and SMS strategy, creative and flows, plus direct mail, subscriptions, loyalty and memberships, and does not run paid ads. Its health and wellness case studies include Zivolife and Begin Health.

Best for: US brands that want a US-based email and SMS team working across many categories.

3. Magnet Monster

Known for: high-volume email, SMS, WhatsApp and direct mail production, with unlimited sends.

Location: Sale, Cheshire, United Kingdom, with a Singapore entity

Key services: Magnet Monster covers email, SMS, WhatsApp, direct mail and subscription management, and offers a Klaviyo and subscription audit before a brand signs. Its wellness clients include Wild, Waterdrop and Spotlight Oral Care.

Best for: brands that want a high-volume production partner, where the number of sends is the priority.

4. 100 Celsius

Known for: subscription advice for in-house teams. It designs the subscription programme and the brand's own team or agency builds it.

Location: United States

Key services: 100 Celsius advises on subscription offers and plan pickers, early churn, customer portals and cancellation flows, subscriber email flows and retention analytics, for brands on Skio, Recharge or Stay AI with 5,000 or more active subscribers. Its named clients include Magic Mind, Luma Nutrition and Simply Nootropics.

Best for: subscription brands with their own team or agency in place to build what it designs.

5. Growth Gurus

Known for: lifecycle, loyalty and customer data work for brands in Australia and Asia-Pacific.

Location: Newcastle and Melbourne, Australia

Key services: Growth Gurus runs email, SMS and lifecycle programmes, loyalty and referral, customer data and segmentation, and list growth, alongside training and coaching. Its wellness work includes a women's health supplement brand, Happy V.

Best for: brands selling mainly in Australia and Asia-Pacific.

6. Forge Digital Marketing

Known for: full-service DTC marketing for supplement brands, with email alongside paid media, SEO and web.

Location: United States, with team members in Brazil and Spain

Key services: Forge Digital Marketing covers web design, paid social and search, SEO, conversion optimisation and Klaviyo email, with a dedicated supplement practice. Its supplement work includes Irwin Naturals.

Best for: supplement brands that want paid ads and email from one agency.

7. Sticky Digital

Known for: retention and Shopify site work for North American brands, with case studies weighted towards beauty and fragrance.

Location: North America

Key services: Sticky Digital runs email and SMS, loyalty and subscription programmes, Shopify stack work and conversion optimisation, and has a service line for wellness and supplement brands.

Best for: North American beauty brands that want site and conversion work alongside email and SMS.

What should you ask a retention agency before signing?

• What number will you be measured on, and what is it today? Attributed email revenue rises with send volume whether or not anything improved.

• What do you track, and how will you report it? Ask to see a real monthly report, and whether it shows first-to-second purchase rate, repeat revenue by cohort and subscription churn, or only opens, clicks and attributed revenue.

• How do you decide what to work on first? A good answer ranks the work by how much profitable revenue each change can move, not by what is quickest to build.

• What happens to a new customer in the first 30 days? In health and wellness this is where most repeat revenue is won or lost.

• What share of subscription cancellations happen before the first renewal, and what will you change about it?

• Do you understand product and health claims? Ask what they would and would not let you say about your product in an email or text.

• Is the whole system in scope, meaning customer data, the offer, the subscription and direct mail, or only campaigns and flows?

Where does acquisition end and retention begin?

Think of retention as an engine. The customers you acquire are the fuel. The retention system is the engine: the first product experience, the offer that earns the second order, and the customer data behind every message. Repeat orders and cashflow are what comes out. Email, SMS and direct mail are how that system reaches the customer, and they perform as well as the engine behind them.

What comes out is also decided by what goes in. A customer who arrives on a creator's recommendation is usually a better starting point for a second order than one who arrived on a deep discount code, because they came for the product rather than the price. Content from real people using the product keeps working after the first order too, in post-purchase emails, on product pages and in ads, as proof that it does what it says. Augmentum Media's guide to influencer seeding covers how creator programmes bring in those customers and that content, and influencer versus affiliate marketing covers where the commission model fits alongside it.

Everboost builds and runs the engine, and measures it on how many first-time buyers come back and how much profitable revenue they bring in: at PhycoHealth, returning customers rose 160% in eight months while new customers fell 42%. Better fuel and a well-built engine are two halves of the same result.

Frequently asked questions

What is the best retention marketing agency for a health and wellness brand?

The one that makes the most profitable revenue from the customers you already have. For a retention programme run as one system across email, SMS, direct mail and subscriptions, built for 7-8 figure health and wellness brands, Everboost. For subscription strategy your own team builds, 100 Celsius. For paid ads and email from one agency, Forge Digital Marketing. For Australia and Asia-Pacific, Growth Gurus.

What does a retention marketing agency do?

It grows the revenue and profit a brand makes from the customers it already has. That covers customer data and segmentation, email, SMS and direct mail, the subscription programme, and often loyalty, ideally run as one system. Acquisition, meaning paid ads and creators, usually sits with a separate team.

How is a retention agency different from an email marketing agency?

An email agency is measured on the channel: sends, opens and attributed revenue. A retention agency is measured on customer behaviour and profit, meaning first-to-second purchase rate, subscription churn, customer lifetime value and repeat revenue, and runs email and SMS as part of a wider system that includes the offer, the subscription and direct mail.

How much does a retention marketing agency cost?

Most charge a monthly fee scoped to the brand, and some publish prices while others quote after an audit. Your platforms, such as Klaviyo, SMS credits and your subscription app, bill you directly for their own software, so compare agency quotes on what work is included and what the agency is measured on.

When should a health and wellness brand hire a retention agency?

Usually once the brand is doing around £2m a year and acquisition is working but not enough customers come back. Below that, cash tends to work harder in acquisition and offer testing.

How long before retention work shows results?

Quick wins such as fixed flows and deliverability usually land in the first month or two. Changes to repeat purchase and subscription churn show over a quarter, because a purchase cycle has to complete before you can measure them.

Should a supplement brand launch a subscription?

Usually yes for a product customers use daily, but the offer matters more than the discount. Customers who can skip, pause or change frequency stay longer than customers whose only option is to cancel, and many early cancellations come from having too much product rather than disliking it.

Do retention agencies run paid ads?

Most do not. Full-service agencies such as Forge Digital Marketing run both, which suits brands that want one team. Retention specialists usually work alongside a separate acquisition or creator partner.

What should happen after an influencer or creator programme lands the first order?

A post-purchase sequence that explains how to use the product and when to expect results, a reminder timed to when the first pack runs out, and a subscription offer once the customer has seen it work. That journey is where a creator-acquired customer becomes a repeat one.

Acquisition is the half we run. If you want the creator side of this looked at alongside your retention programme, let's talk.