The complete guide to retention marketing channels

Retention marketing channels are the places a brand keeps talking to customers after the first purchase: email, SMS, direct mail, loyalty programs, branded merchandise and the digital touchpoints that follow customers online. No single channel keeps a customer on its own. The strongest results come from a mix that fits how your customers actually buy, runs on one view of the customer, and is measured against a holdout group so you can prove what each channel adds.

TL;DR: Which retention marketing channels should you use?

Here's the short version for busy marketers.

• Start from the customer, not the channel. Your data should tell you who's drifting, who's growing and who's worth the most. Then you pick the channel.
• Email and SMS do the frequent work. Direct mail and branded merchandise do the memorable work. Loyalty programs give customers a reason to keep coming back.
• More channels generally help, up to a point. Every added channel needs coordination, or customers feel bombarded.
• Measure incremental lift, not activity. A holdout group shows the revenue each channel actually added.
• One team across strategy and execution keeps the handoffs from leaking value.

For the bigger picture, read why brands need both customer acquisition and retention and what separates omnichannel from multichannel marketing.

What is retention marketing?

Retention marketing is everything a brand does to keep existing customers buying, engaged and growing in value after their first purchase. Its channels are the owned and paid touchpoints that do that work.

Acquisition channels are judged on reach and cost per new customer. Retention channels are judged on repeat purchases, retention rate and lifetime value. The audience is people who already know you, so the message can be far more personal. You know what they bought, when they bought it and how they like to hear from you.

That's also why retention is where personalization pays off fastest. You aren't guessing at a stranger's interests. You're acting on behavior you've already seen.

Which customer retention marketing channels work best?

The best customer retention marketing channels are the ones your best customers already respond to, each assigned to the job it does best.

Here's how we think about the core channels:

• Email: Your workhorse for onboarding, replenishment reminders, product recommendations and win-back sequences. It's inexpensive per send and easy to personalize, so it carries most of the frequent communication. See our email and SMS marketing services.
• SMS: Best for time-sensitive moments such as booking reminders, order updates, flash offers and appointment confirmations. Opt-in customers expect texts to be short and worth their attention, so send fewer and make them count.
• Direct mail: The channel customers hold in their hands. It's strong for reactivating lapsed customers, rewarding top tiers and reaching people who've tuned out their inbox.
• Loyalty programs: The structure that gives customers a reason to return and gives you data on what they value. Points are the start. Personal recognition is what keeps members active. Learn about our loyalty program design and management.
• Branded merchandise: A keepable touchpoint for VIP thank-yous, member milestones and launch moments. It stays in a customer's home long after an email is deleted. Here's why branded merchandise belongs in a multichannel strategy.
• Digital retargeting, app and push: These extend a message beyond the mailbox or inbox, reaching the same customer on social, mobile and the web.

How many retention channels should you use?

Use as many channels as you can coordinate well, and add them one at a time based on results.

There's a real case for breadth. Braze reports that its 2024 Retention Guide found brands see an average 56% uplift in 90-day retention for each channel added to the marketing mix, up to six channels. (Braze)

But every channel you add is another set of segments, creative and timing rules to manage. If your email program isn't segmented yet, adding SMS will multiply the problem rather than solve it.

For example, a specialty retailer might start with a well-segmented email program, then add SMS only for customers who opted in and booked or bought in the last 90 days. Once both are performing, direct mail comes in for high-value customers who've gone quiet in digital channels. Each step has a clear job and a clear test.

How does direct mail marketing drive customer retention?

Direct mail drives customer retention by reaching your most valuable and most at-risk customers with something they can hold, targeted with the same data that powers your digital channels.

Recency, frequency and monetary value are a strong place to start when deciding who gets mail. Here's a simple guide to RFM.

For example, Fleet Feet sent reward reminder mailers targeted by loyalty tier. The campaign earned a 24% response rate, 5% higher than the holdout group, and a 600% incremental ROI.

Response360 gives your direct mail multiple impressions online, on social media and on mobile, retargeting the households on the mail list. That means 8–32 impressions per mailer, and clients who add Response360 see response rates 23–46% higher than direct mail alone. Explore our direct mail services.

Results reflect specific client engagements; averages are noted where applicable.

How do you coordinate channels without overwhelming customers?

You coordinate channels by giving each one a defined job, setting frequency caps across all of them, and letting customer behavior decide what goes out next.

Customers notice when a brand talks too much, and the unsubscribe link is always one tap away. The fix is orchestration, not silence. Count every touch across channels, not per channel. Suppress promotional messages when a customer has an open service issue. When someone converts from an email, pull them out of the mail drop that was scheduled for the same week.

Strategy should drive the technology, not the other way around. We're platform agnostic, so this coordination happens inside the CRM, email and loyalty platforms you already use.

How do you measure retention marketing channels?

You measure retention marketing channels by comparing customers who received a message against a similar group who didn't, then tracking the revenue difference over time.

Open and click rates tell you a message was seen. They don't tell you it changed behavior. Build these into your reporting instead:

• Incremental revenue: The lift over a holdout group, by channel and for the program as a whole.
• Retention rate: The share of customers still active at 90 days, 6 months and a year. See why industry retention benchmarks fall short.
• Repeat purchase rate: How many customers come back for a second and third purchase.
• Customer lifetime value: Tracked by cohort, so you can see which journeys build the most durable relationships.
• Unsubscribe and opt-out rate: An early warning that frequency or relevance is slipping.

How did Stanley Steemer grow revenue across email, SMS and direct mail?

Stanley Steemer grew revenue by running email, SMS and direct mail as one holistic CRM program, with Baesman's strategy and execution teams embedded alongside theirs.

The challenge. Stanley Steemer needed every retention channel to drive bookings and to prove its contribution, not just add volume.

The solution. One challenge. One idea. One accountable team. We built a data-led CRM program in which each channel had a defined role and every result was measured.

The impact (results 2025 YTD):

• SMS drove online booking revenue up 113%.
• Email lifted phone-booked sales 87% and email ROI 9%.
• Direct mail delivered a 21% incremental ROI.
• Holistic CRM revenue reached $30M and growing, up 2% year over year.

Andrew Schneider, Chief Marketing Officer at Stanley Steemer, put it this way:

"They've helped us unlock growth across email, SMS, and direct mail by taking a data-driven approach and orchestrating these channels in ways we couldn't have done alone."

Read the full Stanley Steemer story.

Results reflect specific client engagements; averages are noted where applicable.

What mistakes weaken a retention channel mix?

The most common mistakes in customer retention strategies come from running channels in silos instead of around the customer.

• Separate vendors, separate data: When email, mail and loyalty each sit with a different partner, nobody sees the whole customer, and offers collide.
• Same message everywhere: Copying an email into a text and a postcard wastes what each channel does well.
• Discount dependence: Leaning on offers trains customers to wait for the next deal. Recognition and relevance hold up longer.
• Measuring activity instead of lift: Sends and opens look good in a dashboard but can't defend a budget.
• Adding channels before the basics work: New channels amplify whatever segmentation you already have, good or bad.

Final takeaway: Retention works best as one connected program

The channels matter less than how they work together. Email, SMS, direct mail, loyalty and branded merchandise each have a job, and the value comes from giving every customer the right one at the right time.

Start with your data, assign each channel a role, cap the frequency and measure lift against a holdout. Then add channels when the last one is performing.

We deliver strategy and execution services that drive results across the full customer lifecycle - from acquisition to retention. If you want one team to plan, run and measure your retention channels, let's talk about what Customer Strategy Services can do for your program.

Frequently asked questions about retention marketing channels

What is the difference between retention and acquisition marketing?

Acquisition marketing brings in new customers and is measured by cost per acquisition. Retention marketing keeps existing customers buying and is measured by retention rate, repeat purchases and lifetime value.

Is email or SMS better for customer retention?

Email is better for richer, more frequent content like recommendations and onboarding, while SMS is better for short, time-sensitive messages. Most brands get the best results using both, with clear rules for which message goes where.

How does email marketing improve customer retention?

Email improves retention by staying in touch between purchases with messages triggered by what each customer did, such as onboarding after a first order, replenishment reminders and a win-back offer when someone goes quiet.

How often should you message existing customers?

There's no single right number. Set a ceiling for all channels combined, then adjust it by segment based on engagement and opt-out rates.

What role does retention marketing play in customer lifetime value?

Retention marketing is the main lever on lifetime value, because every repeat purchase and every extra month a customer stays adds to what they're worth. That's why lifetime value by cohort is a better measure of a retention program than campaign response.

Do I need new technology to run a multichannel retention program?

Usually not. A good partner works with the CRM, email and loyalty platforms you already own and focuses on getting more out of them.