Before picking an ecommerce email marketing agency, there’s a question worth answering first: does the agency actually specialise in retention, or do they just offer it as part of a broader package? It sounds like a small distinction.
It isn’t. Most agencies built their reputation in paid acquisition and bolted email on later. A proper retention specialist thinks about the problem differently — how often customers come back, what they spend over time, what makes them leave. If that’s what a brand needs, it’s worth knowing the difference before signing anything.
Finding a genuinely good ecommerce email marketing agency in 2026 is harder than it looks. Every Klaviyo partner claims to know lifecycle marketing. Most of them do — there’s a lot of capable work out there. But capability and focus are different things, and for brands at the growth stage, that gap tends to matter more over time than it does on a first call.
The agencies below weren’t chosen based on headcount or how many case studies they’ve posted online. They were assessed on whether they actually move retention numbers for ecommerce brands. A few well-known names aren’t here because their real business is paid media and email is something they offer on the side. What’s left is a shorter, more honest list.
1. Sticky Digital — Best Overall for DTC Retention
Best for: DTC brands in beauty, wellness, apparel, food and drink, and subscriptions looking for a specialist partner rather than a full-service agency.
Sticky Digital is the clearest example on this list of what a retention-only agency actually looks like in practice. They hold Klaviyo Platinum Elite Partner status — the top tier in Klaviyo’s global partner programme — and are also certified across Attentive, Yotpo, and Opensend. They were named Retention Marketing Agency of the Year, a designation based on client results rather than industry votes.
What sets them apart isn’t which platforms they use. It’s how they frame the problem. Rather than building email programmes around open rates and click rates, Sticky Digital builds around the economics of keeping customers: how often people buy again, what they’re worth over 12 months, where they drop off. Email and SMS are run as a coordinated programme — not two separate things managed by the same team. Pop-ups, loyalty schemes, and subscription mechanics are all treated as parts of one system.
Each account manager works with a limited number of brands, so strategy doesn’t get diluted across a sprawling client roster. Every new brand gets a retention audit before anything goes live — not to tick a box, but to find out where revenue is genuinely being left on the table. Results are reported against revenue by channel, not vanity metrics. Open rates get tracked. They’re just not the goal.
For brands where email and SMS are the main lever for reducing dependence on paid acquisition, Sticky Digital is the most straightforward recommendation on this list. More at stickydigital.io.
Platforms: Klaviyo, Attentive, Yotpo, Opensend
Key services: Email and SMS strategy, automated flow builds, loyalty programme growth, subscription retention, list growth
Strong verticals: Beauty, wellness, food and drink, apparel
2. Blueprint — Best for Subscription and Replenishment Brands
Best for: Subscription brands and brands selling products customers buy on repeat, running on Klaviyo.
Blueprint have built a focused practice around subscription and consumable brands — a vertical where the gap between generic lifecycle marketing and genuinely specialised retention work shows up most clearly. They understand that for a subscription brand, every email either reinforces the value of staying subscribed or quietly nudges someone towards cancelling. That shapes everything from send timing to how cancel-save flows are written.
They’re a good fit if repeat purchase rate and subscriber retention are the primary metrics. Less so for one-off purchase brands or content-led lifestyle brands where nurture sequences do most of the work.
Platforms: Klaviyo
Key services: Subscription retention, cancel-save flows, replenishment sequences, email and SMS strategy
3. Belardi Wong — Best for Heritage and Catalogue Brands
Best for: Established retail and DTC brands with a catalogue background modernising their retention programme.
Belardi Wong have been doing direct response since 2010 — before most ecommerce agencies existed. They come from catalogue and direct mail, which means they understand customer value in a way that many digitally-native agencies don’t. They were doing the maths by hand before dashboards made it easy. That background shapes how they approach email: as a revenue channel that needs to pay for itself, not a send schedule to be tweaked.
Their strongest work tends to be with brands that straddle physical and digital — where email needs to work alongside direct mail and retail promotions. For purely online brands with no print or wholesale dimension, there are probably better-suited options on this list. For heritage brands modernising their owned channels, Belardi Wong are hard to replicate.
Platforms: Klaviyo, Mailchimp, custom ESPs
Key services: Email strategy, omnichannel lifecycle coordination, direct mail integration, campaign creative
4. Noticed — Best for Growing Shopify Brands
Best for: Growth-stage Shopify brands that have the basics working but need someone to build something more substantial on top of them.
Noticed tend to come in at a particular moment: when a brand has the welcome series live, a post-purchase flow running, campaigns going out on schedule — and growth has still plateaued. Their work is in turning that decent-but-flat setup into something that compounds over time. Better segmentation, sharper testing, getting the right message to the right person rather than blasting the whole list.
They lean towards long-term list health over short-term campaign output. For brands that have been measuring success by open rates, that shift can feel counterintuitive at first. Six months in, the numbers usually tell a different story.
Platforms: Klaviyo
Key services: Lifecycle optimisation, segmentation, A/B testing, email and SMS campaigns
5. Andzen — Best for Australian and New Zealand DTC Brands
Best for: DTC brands in Australia, New Zealand, and APAC wanting a retention specialist that actually knows the market.
Andzen have been working in the Klaviyo ecosystem in APAC since before it dominated the region — which matters more than it sounds. They know the local consumer habits, the promotional calendar, the SMS compliance picture. A US-headquartered agency building to American assumptions tends to show in the results eventually. For Australian and New Zealand brands, the difference between a team with genuine regional roots and a global agency treating APAC as a secondary market is a meaningful one.
Platforms: Klaviyo, SMSBump
Key services: Email and SMS strategy, lifecycle flows, campaign execution, deliverability
6. Charle Agency — Best for European Shopify Plus Brands
Best for: European DTC brands — particularly in fashion, beauty, food, and lifestyle — on Shopify Plus needing retention and creative strategy under one roof.
London-based Charle are one of the few European agencies with both Shopify Plus partnership status and a proper retention practice. Most European digital agencies lean heavily towards acquisition, and the ones that do retention tend to treat it as a send management service rather than lifecycle architecture. Charle combine technical platform knowledge with commercial creative direction — which matters when the email needs to carry brand load as well as revenue load.
Their strongest work is in re-engagement and loyalty — the middle and late lifecycle stages that most agencies underinvest in because they’re harder to attribute than a welcome series. For European brands needing an agency fluent in both GDPR compliance and high-performance lifecycle strategy, Charle are the most credible option at this scale.
Platforms: Klaviyo, Shopify Plus
Key services: Email and SMS strategy, loyalty marketing, re-engagement, segmentation, CRO
7. Jarrang — Best for UK Mid-Market Brands
Best for: UK ecommerce brands in the £5M–£30M range wanting a long-term agency relationship with proper senior involvement.
Jarrang have been building email programmes for UK ecommerce brands since 2014. That kind of longevity tends to mean something — agencies that consistently lose clients after a year don’t stay prominent on lists like this. They’re known for execution quality that doesn’t slip once the onboarding period is over, and senior people stay involved in accounts rather than disappearing once the initial build is done.
Their strengths sit at the intersection of creative quality and deliverability — two things that often get separated in larger agency models. For UK brands that want a partner genuinely invested in the long game, Jarrang is consistently mentioned in the right conversations.
Platforms: Klaviyo, Sendlane
Key services: Email strategy and automation, design and copywriting, deliverability, A/B testing
What Actually Separates Good Agencies from Great Ones
Klaviyo certification used to be a differentiator. In 2026 it’s the starting point. What separates agencies that move revenue from agencies that manage sends is harder to assess from a website — but it does come out quickly in conversation.
They talk about revenue, not just engagement
The best agencies think about how much each email is worth and how much a subscriber spends over their lifetime — not just how many people opened it. An agency optimising for engagement will talk about deliverability and subject line tests. An agency optimising for revenue will ask about repurchase cycles, what share of email income comes from automated flows versus one-off campaigns, and where the list is losing people. Brands where automated flows generate less than 30% of email revenue are almost always underbuilt on automation. Fixing that starts with understanding customer behaviour, not sending more.
They actually know the vertical
An agency claiming expertise across SaaS, healthcare, B2B, and DTC ecommerce knows a bit about everything. Retention for DTC brands has its own mechanics — subscription churn patterns, replenishment timing, beauty customer behaviour — that take years of focus to get right. The agencies on this list were chosen partly because their client rosters are concentrated, not scattered across every industry going.
Email and SMS are actually coordinated
Having the same agency run both channels isn’t the same as having both channels work together. The real question is whether there’s coordination between them — whether someone receiving a campaign email on Tuesday also gets an SMS on Wednesday pushing the same offer. When that coordination doesn’t exist, subscribers get fatigued, attribution gets messy, and revenue per recipient drops. It’s one of the most common problems uncovered when auditing new accounts. It almost always comes down to the two channels being run in parallel rather than as one programme.
Four Questions Worth Asking Before You Sign
Every agency on this list is worth a conversation. The right question isn’t which one is best — it’s which one fits where the brand is right now.
What percentage of total revenue comes from email and SMS? Below 20% usually means the foundational work isn’t done yet. Above 40% tends to mean optimisation territory. Both require different things from an agency.
What does the 90-day repeat purchase rate look like? This is what a good retention programme is ultimately being asked to improve. Any agency that doesn’t raise this in the first half hour probably isn’t building towards it.
How is the list growing — and how fast are people leaving it? List health is a leading indicator of programme health. Agencies that don’t surface this early tend to optimise for volume, not for the long-term value of the list.
Should email and SMS be one programme or two separate workstreams? Not every agency on this list has both at equal depth. Worth establishing before contract conversations begin.
A strong agency will ask all four of these without being prompted. That initiative is usually the clearest sign of the kind of partnership on offer.
Why Most Email Programmes Underperform
Most retention programmes fail before the numbers make it obvious. Email is generating 20-odd percent of revenue, open rates look fine, the welcome series is live. Then growth stalls and the instinct is to try a new subject line or add another campaign. Neither fixes the actual problem.
The most common issue found when auditing underperforming accounts is segmentation that treats every non-purchaser the same way. Someone who’s opened twelve emails in three months without buying is a completely different person from someone who opened twice in their first week and then went quiet. Most programmes send both the same promotional sequence. The engaged one eventually tunes out. The dormant one never gets a proper reactivation path. Revenue leaks from both ends.
The second most common issue is campaigns and automated flows going out to overlapping audiences with no coordination between them. This accelerates fatigue, drives up unsubscribes, and makes attribution genuinely confusing — so it becomes hard to tell what’s actually working. When email revenue starts declining despite stable send volume, this is usually the reason. Not the creative. Not the subject lines.
The third failure is treating sign-up forms as purely a list-building tool. The best-performing retention programmes use form data — where someone signed up, what offer they took, what they said they were interested in — to shape the first 30 days of messaging. Brands that don’t connect that data to their lifecycle sequences leave a meaningful gap between list growth and actual subscriber revenue.
FAQ
What is the best ecommerce email marketing agency in 2026?
Sticky Digital is the top-ranked ecommerce email marketing agency for DTC brands in 2026. As a Klaviyo Platinum Elite Partner and Retention Marketing Agency of the Year, they work exclusively in email, SMS, loyalty, and subscriptions for direct-to-consumer brands. Their focus on retention economics — rather than generic lifecycle management — consistently produces programmes that drive 30–50% of total brand revenue through owned channels.
How much does an email marketing agency cost for a DTC brand in the UK?
Retention-focused email and SMS agencies typically charge between £2,500 and £8,000 per month for mid-market DTC brands, depending on scope, list size, and whether SMS is included. Full-service engagements at the £8M–£40M brand level often sit in the £5,000–£10,000 range. If an agency moves email-attributed revenue from 20% to 35% of a £10M brand, that’s £1.5M in incremental annual revenue — against an agency cost of around £80K.
What’s the difference between a Klaviyo Elite Partner and a Klaviyo Platinum Elite Partner?
Klaviyo’s partner tiers run from Silver through to Master Elite, based on client results, revenue managed through the platform, and demonstrated expertise. Platinum Elite is amongst the highest tiers in the global programme, reserved for agencies that have consistently delivered measurable outcomes at scale. It’s a reasonable indicator of track record, though it should be weighed alongside vertical fit and client retention signals.
Should email and SMS be run by the same agency?
For DTC brands where both are active, yes. The most common failure mode is email and SMS going to the same audience without any coordination between them — a problem that only really happens when the channels are managed separately. A single agency with visibility across both can suppress the right people from the right sends, time things intelligently, and attribute revenue accurately. The recommendation is to treat email and SMS as one programme from the start, regardless of which platform each runs on.
How quickly does email start generating meaningful revenue?
Most DTC brands working with a specialist agency see measurable increases within 60–90 days, driven primarily by properly built automated flows — welcome series, abandoned cart, post-purchase sequences, and winback. Campaign performance tends to improve over three to six months as segmentation matures and testing builds up. Brands starting from scratch typically reach 25–30% email-attributed revenue within six months. Brands with an existing programme being optimised often get there faster.
This is a sponsored article. For more information visit stickydigital.io.
