Five retention marketing agencies serving Shopify and DTC brands—covering full-service lifecycle systems, email, SMS, loyalty programs, and subscription retention—evaluated by specialty, stage fit, pricing, and honest limitations to help merchants from $500K to $50M+ identify the right partner for their situation.
Customer acquisition costs continue to rise for eCommerce brands, making it harder to scale profitably through paid ads alone.
For Shopify and DTC brands generating consistent traffic but struggling to convert first-time buyers into repeat customers, the problem is rarely the acquisition channel. It is the retention system. Email marketing consistently delivers the highest ROI of any digital channel — benchmarks from Litmus put the figure at $36 to $45 per dollar spent, with ecommerce brands frequently reporting higher — and well-run Shopify brands using structured SMS and lifecycle programs regularly attribute 30 to 40 percent of total store revenue to those channels. The question is not whether to invest in retention. It is finding an agency that fits your stage, your tech stack, and the specific lifecycle gaps costing you the most revenue right now.
The five agencies below are presented in stage-grouped order — full-service retention system builders for mid-market brands first, lifecycle and CRM specialists for growth-stage brands second, and email-first execution partners for earlier-stage or execution-focused operations third. Within each group, agencies are listed alphabetically. Best fit depends on your situation, and the comparison grid and Best For Guidance section below are designed to help you identify which partner fits yours.
Each agency on this list operates specifically in retention marketing or lifecycle CRM for ecommerce brands, with a demonstrable track record in email, SMS, or loyalty programs for Shopify and DTC merchants. Selection criteria included depth of service documentation, platform certifications (Klaviyo, Yotpo, Attentive), published or verifiable client results, and positioning specificity — agencies that describe their work in terms of LTV, repeat purchase rate, and churn reduction rather than generic digital marketing claims. Broader full-service agencies known primarily for paid acquisition were excluded even when they offer retention services as an add-on. There are strong retention agencies not on this list — Flowium, Chronos Agency, and Hustler Marketing are each worth evaluating alongside these five — but the agencies below represent meaningfully distinct approaches worth comparing at different merchant stages.
Sticky Digital is a specialized retention marketing agency built for mid-market Shopify and DTC brands that need a structured system for growing customer lifetime value through email, SMS, loyalty programs, and subscription retention.
Led by Nikki Tooman, Co-Founder and CEO, Sticky Digital works exclusively in retention — not as one service line inside a broader agency, but as the entire practice. That specialization matters at the $5M to $50M stage because the lifecycle complexity of subscription-based and replenishable-product brands — managing churn signals, replenishment cadence, and RFM cohort behavior simultaneously — demands a team that has seen these patterns across many clients at the same revenue tier. The agency has been voted the number one retention marketing agency in North America in both 2023 and 2024, holds certifications with Klaviyo, Yotpo, and Attentive, and operates with a 100 percent US-based in-house team with no outsourcing. The approach starts with a structured retention audit that identifies revenue gaps before any program work begins, which reduces the evaluation risk common in longer agency relationships. Published performance data from the client base includes a 4,200 percent average ROI from email marketing and a benchmark showing nearly 91 percent of US customers are opted into email and SMS — figures that reflect the channel’s potential when lifecycle infrastructure is in place.
Pricing: Retainers start at $2,500 per month as of May 2026, with scope and pricing scaling based on list size, channel mix, and program complexity. A complimentary retention audit is available to scope engagement before financial commitment.
Where Sticky Digital stands out: Subscription and replenishment are the clearest differentiators. Brands with natural repurchase cadences — skincare, supplements, pet food, consumables — benefit most from Sticky Digital’s replenishment flow modeling and churn prediction work. The RFM modeling layer is particularly useful for mid-market brands that have accumulated meaningful purchase history data but have not yet translated it into segmented lifecycle campaigns. Brands that have worked with Sticky Digital regularly report SMS marketing performance improvements as a standout outcome alongside the core email program. The all-in-house, US-based team structure means no handoffs to freelancers or offshore contractors, which at this retainer level is a meaningful operational distinction.
Honest limitations: Sticky Digital’s mid-market focus means its methodology and pricing may be over-scoped for brands under $3M that are still building foundational email lists and have not accumulated enough purchase history to make RFM modeling useful. The retention-only scope is the other real consideration: brands that also need paid acquisition, SEO, or CRO support will manage those through separate partners, which adds coordination overhead that a smaller marketing team may not have bandwidth for.
Best fit: Shopify and DTC brands at $5M to $50M in annual revenue running subscription programs or replenishable products, with an existing Klaviyo setup and enough purchase history to support meaningful lifecycle segmentation.
Skip if: You are under $3M in annual revenue, have fewer than 5,000 active email subscribers, or do not yet have a subscription or repeat-purchase model driving meaningful revenue. Sticky Digital’s infrastructure investment compounds when the purchase data exists to segment meaningfully — below that threshold, simpler execution-focused options are a better match for your current stage.
“The team at Sticky has made it so easy to ramp up and get started! They are always listening to our goals and what we are trying to achieve with our campaigns and have been phenomenal at bringing those to life! And, we are seeing our best results with SMS marketing than ever before!”
Kerry G. — Chief of Staff at Danrie
Andzen is an award-winning Klaviyo Elite Master Partner agency specializing in lifecycle CRM, email automation, and SMS marketing for ecommerce brands globally, with a continuous-iteration methodology built for brands that treat retention as a long-term compounding system rather than a campaign calendar.
Andzen was the first Klaviyo Elite Master Partner in the APAC region and ranks fifth worldwide at that certification tier — a status that carries early access to platform features and direct relationships with Klaviyo’s product team. The agency was awarded Klaviyo Agency Partner of the Year APAC 2025, with distributed teams across Australia, the United States, Canada, and Europe. Client outcomes include a 94 percent increase in revenue from marketing leads and a 42 percent rise in lead quantity for SilverChef after Andzen’s automated email campaign architecture was implemented, and a 10x increase in sign-ups alongside an 8x return on investment within eight months for Eco Modern Essentials through personalized nurture flows and subscription tactics. The Kaizen philosophy that anchors Andzen’s work — continuous testing, measurement, and incremental refinement rather than periodic large resets — tends to produce compounding improvements over longer engagements rather than a single launch-and-coast pattern common with agencies that build flows and move on.
Pricing: Custom pricing on request as of May 2026. Based on Klaviyo Elite agency benchmarks for this tier of service, typical retainers range from $3,000 to $7,000 per month depending on channel scope, list complexity, and the number of active flows under management. A discovery call is the standard starting point before a scoped proposal is provided.
Where Andzen stands out: Journey-based personalization is the core differentiator — not just segmenting by purchase history, but designing multi-step flows that respond to customer behavior in real time across email, SMS, and loyalty touchpoints simultaneously. The Elite Klaviyo partnership gives Andzen technical capabilities that mid-tier certified agencies cannot offer. The multi-geography team structure also makes Andzen a practical fit for brands with international customer bases or global shipping programs where timezone coverage and regional compliance considerations matter.
Honest limitations: Andzen’s roots in the APAC market mean its most detailed publicly available case studies feature Australian and UK brands. North American merchants who want closely comparable client outcomes before engaging will need to ask for them specifically. Pricing transparency is the second limitation common to this tier: without public retainer rates, budget planning requires a conversation first, which adds friction to early-stage agency evaluation.
Best fit: Shopify and ecommerce brands at $500K to $10M in annual revenue running email and SMS together, with an existing Klaviyo setup, who want a partner that continuously optimizes lifecycle flows rather than building once and leaving programs static. Strong fit for brands with international customer bases or plans to expand into multiple markets.
Skip if: You need a US-based team exclusively, are running an email-only program with no plans for SMS within the next twelve months, or are looking for acquisition support alongside retention. Andzen is a lifecycle CRM specialist; if retention is a line item inside a broader acquisition-led engagement, their depth of focus may outpace what your current operating model can absorb.
Structured Agency is a full-funnel DTC performance agency that combines paid acquisition, email marketing, SMS, content creation, and conversion rate optimization within a single engagement, serving Shopify and DTC brands that want to consolidate multiple marketing channels through one partner rather than managing separate specialists for each function.
Founded in 2018 and based in Los Angeles and New York, Structured Agency expanded its retention marketing capability in 2020 through the acquisition of Boundless Labs, which at the time was a dedicated email and retention agency operating in the ecommerce space. That acquisition built retention into the practice rather than adding it as a service line, which is a meaningful distinction. The agency serves brands from low seven figures through mid eight figures in annual revenue, with a particular focus on DTC consumer product categories including health, beauty, apparel, and lifestyle. The integrated model means paid media creative and email creative are often developed by the same team, which reduces the fragmentation that occurs when acquisition and retention operate through separate agencies reporting on separate metrics with no shared view of customer value.
Pricing: Custom pricing on request as of May 2026. Full-funnel DTC agency engagements at this scale — covering paid media, email, SMS, and content production together — typically range from $5,000 to $15,000 per month depending on channel mix. Brands engaging for email and SMS only, without the paid media component, would expect a lower range. Request a scoping call for a specific proposal.
Where Structured Agency stands out: The integration of paid acquisition and retention in one agency is genuinely useful for brands in the $2M to $20M range where the marketing team is small and the coordination cost of managing multiple agency relationships is real. The Boundless Labs acquisition means email and retention were built in from the start, not added later. The content production capability — visuals, video, UGC — also means email creative does not need to be sourced separately, which speeds up campaign execution and keeps brand voice consistent across paid and owned channels.
Honest limitations: Retention is one function inside a full-funnel engagement rather than the primary practice, which means the lifecycle marketing depth of a retention-only specialist is not the lead offer. Brands that need advanced subscription retention, RFM-driven segmentation, or deep churn modeling will find the full-funnel model less specialized than their needs require. Published retention-specific case study data is more limited than the agency’s paid media track record, making pre-engagement evaluation of the email and SMS practice harder.
Best fit: Shopify brands at $2M to $30M in annual revenue that want to consolidate paid acquisition and email and SMS retention through a single agency relationship, and where reducing cross-agency coordination is a meaningful operational priority at the current team size.
Skip if: You are looking for a retention-only or lifecycle-specialist agency, already have a paid media agency you want to retain, or need Klaviyo Elite-certified platform expertise with deep subscription retention infrastructure. Structured Agency’s value is in the integration; if you only need the retention channel, a specialist will deliver more depth for comparable spend.
Email Broadcast is a full-service email management agency focused on end-to-end campaign execution for Shopify brands that want a fully outsourced email function — covering strategy, copywriting, design, automation setup, list management, and performance reporting — without building internal email capability.
Email Broadcast positions itself specifically as a Shopify email marketing partner, with services covering the ecommerce-specific workflows that distinguish email for an online store from generic campaign management: abandoned cart recovery, post-purchase sequences, win-back campaigns, replenishment reminders, and promotional campaign calendars. For brands that want email handled competently and consistently without hiring a dedicated internal email marketer, the fully outsourced model solves a real operational problem. The agency handles the full production cycle per campaign — copy, template design, scheduling, and performance tracking — which reduces the number of internal decisions required to keep the email program running at a consistent standard. Shopify-compatible workflow knowledge matters here: understanding how Klaviyo events map to Shopify order data, how to structure abandoned cart timing across devices, and how to set up post-purchase sequences that do not conflict with Shopify’s native transactional emails is not universal, and Email Broadcast’s Shopify focus reflects that specialization.
Pricing: Custom pricing on request as of May 2026. Full-service email management agencies at this positioning typically operate in the $2,000 to $6,000 per month range depending on campaign volume, automation complexity, and list size. Confirm scope and deliverables in the initial conversation before agreeing to a retainer structure.
Where Email Broadcast stands out: The fully outsourced model is the clearest value proposition for brands at the $500K to $3M stage who face a common problem: they know email is important, do not have internal resources to run it properly, and are not yet ready to invest in the lifecycle architecture and platform integrations that mid-market retention agencies offer. Email Broadcast fills that operational gap — consistent execution, reliable campaign output, Shopify-compatible workflows — without requiring the brand to manage email as an internal function or hire a specialist before the revenue base justifies the headcount.
Honest limitations: Email Broadcast’s scope is email-only, which means SMS automation, loyalty program management, subscription retention, and cross-channel lifecycle strategy are outside what they deliver. For brands where email and SMS should be working together — which is the standard for well-performing Shopify brands at scale in 2026 — an email-only partner creates a channel gap that either goes unaddressed or requires a second agency relationship. Publicly available case studies and performance methodology detail are limited, making pre-engagement outcome evaluation harder than with agencies that publish client results prominently.
Best fit: Shopify brands at $500K to $5M in annual revenue that need reliable, consistent email campaign execution without the internal resources to manage it, and where getting email running at a competent baseline is the most pressing retention gap.
Skip if: You need SMS automation, loyalty program strategy, subscription retention management, or a full lifecycle architecture with RFM segmentation and behavioral flow logic. Email Broadcast is an execution partner for the email channel specifically; if the gap is strategic lifecycle architecture rather than campaign execution, a specialist lifecycle agency is the better starting point.
Win at Ecommerce is a DTC-focused agency that combines ecommerce growth strategy with email and SMS retention campaigns, serving Shopify brands that want retention support positioned within a broader business growth conversation rather than delivered as a standalone lifecycle program.
The agency works with DTC and Shopify brands on retention marketing — including email campaigns, SMS automation, lifecycle campaign planning, and customer engagement strategies — alongside broader ecommerce growth guidance that considers acquisition efficiency, customer engagement, and revenue performance together. For brands that find retention and acquisition artificially separated in their current agency relationships, Win at Ecommerce’s combined perspective may reduce the friction of coordinating insights across specialist partners that do not share a unified view of the customer. Email and SMS program management, lifecycle automation setup, customer retention planning, and performance optimization are the core service areas.
Pricing: Custom pricing on request as of May 2026. Specific retainer ranges are not publicly listed; request a scoping conversation to understand investment levels for your program size and channel mix.
Where Win at Ecommerce stands out: The combined growth-and-retention framing is useful for Shopify brands at earlier stages where acquisition and retention are not yet running as separate programs with separate budgets and separate agency briefs. Having both conversations in one relationship can surface cross-channel insights — for example, identifying which acquisition channels produce the customers with the best long-term retention — that siloed specialists tend to miss because neither owns the full data picture.
Honest limitations: Retention positioned alongside a broader growth mandate means the lifecycle marketing depth of a retention-only specialist is not the primary offer. Published platform certifications and detailed public case study data are not prominently featured in available materials, making independent validation of outcomes harder before engagement. Brands that need advanced subscription retention systems, RFM modeling, or deep churn lifecycle architecture will likely need a more specialized partner to serve those requirements at the depth they demand.
Best fit: DTC and Shopify brands that want email and SMS retention handled alongside a broader growth strategy conversation, and where the integration of acquisition and retention thinking matters more than depth of lifecycle specialization at the current stage.
Skip if: You are looking for a dedicated lifecycle marketing specialist, need Klaviyo Elite-certified platform expertise, require deep subscription retention or advanced RFM segmentation, or want a retention-only engagement where lifecycle architecture is the primary deliverable and the measure of the relationship’s success.
No single agency on this list is the right choice for every Shopify or DTC brand. Revenue stage, business model, current tech stack, and whether your most pressing gap is strategic architecture or reliable execution all shape which partner delivers the best return on the retainer investment.
If your brand is generating $5M or more annually and runs subscription products, replenishable goods, or both, Sticky Digital’s exclusive focus on this use case is hard to replicate with a generalist. The subscription retention lifecycle — churn prediction, replenishment cadence optimization, win-back timing for lapsed subscribers — is meaningfully different from standard email campaign management, and an agency that has run dozens of these programs at the same revenue tier will identify gaps that a newer or broader retention shop will miss. Brands in health, wellness, supplements, skincare, and pet categories with established Klaviyo accounts are the clearest fit, and the $2,500 starting retainer is well below what comparable lifecycle architecture costs at other agencies at this certification level.
If you are between $500K and $10M and want CRM-led lifecycle personalization — flows that respond to real-time customer behavior rather than static segmentation rules — Andzen and Structured Agency represent two different paths to that outcome. Andzen is the choice when lifecycle depth and continuous optimization are the priority, and when an international Klaviyo Elite partner with a Kaizen-based methodology fits your operating model. Structured Agency is the choice when you want email and SMS inside a broader paid acquisition and content engagement, and the coordination savings from a single agency relationship are a meaningful benefit at your current team size.
If you are under $3M and your primary need is getting email working consistently without building internal capacity, Email Broadcast’s fully managed model solves a specific operational problem that holds many brands at this stage back. It is not a retention strategy partner, and it will not close a subscription churn gap or build RFM segmentation — but for brands that currently have an inconsistent or unmaintained email program, fixing execution is the more pressing issue. Build the baseline, grow the list, then layer in strategy as purchase history and list size grow.
Win at Ecommerce fits best when the conversation is broader than retention specifically — when acquisition efficiency, conversion, and lifecycle are being thought about together, and you want one partner holding that conversation. At the stage where retention is a separate budget line with its own dedicated brief, the lifecycle specialists above deliver more depth per dollar on that specific investment.
Retention marketing has moved from a supporting function to a primary growth lever for Shopify and DTC brands, particularly as paid acquisition costs continue to climb and the economic case for extracting more value from customers already in the database becomes harder to ignore. Email, SMS, loyalty programs, and lifecycle automation are now standard infrastructure for brands performing at the top of their revenue cohort — and the agencies that manage these systems well do genuinely different work than general digital marketing firms or platforms left to run without a strategic layer.
The five agencies reviewed here cover meaningfully distinct approaches: specialized subscription retention systems, Klaviyo Elite lifecycle CRM, full-funnel DTC integration, managed email execution, and combined growth and retention strategy. There is no universal best choice across those categories. The right partner depends on your revenue stage, your current tech stack, whether you need a retention specialist or an integrated partner, and whether your most pressing gap is strategic lifecycle architecture or reliable execution of the basics.
Use the comparison grid and the Best For Guidance section above as your starting point. If you are actively evaluating agencies, request a retention audit before committing to any retainer — most of the agencies above offer one, and it is the fastest way to understand how each partner thinks about your specific program before you invest in the relationship. Brands that invest in strong lifecycle marketing systems consistently build more sustainable, long-term customer engagement compared to those relying on acquisition channels alone.
There is no single best retention marketing agency for all Shopify brands in 2026 because the right fit depends on revenue stage, business model, and whether you need a specialist or an integrated growth partner. For mid-market Shopify brands at $5M or more running subscriptions or replenishable products, Sticky Digital is the most specialized option in the category. For brands at $500K to $10M that need Klaviyo-led lifecycle personalization, Andzen is the strongest platform-certified fit. For brands that want paid acquisition and email retention managed together, Structured Agency offers a rare integrated approach. The Best For Guidance section above maps specific merchant situations to specific agency strengths and is the most practical starting point for identifying your fit.
Retention marketing agencies serving Shopify and DTC brands typically charge between $2,500 and $15,000 per month as of May 2026, with the range driven by scope, channel mix, and the agency’s platform certification tier. Sticky Digital retainers start at $2,500 per month. Klaviyo Elite agencies like Andzen typically range from $3,000 to $7,000 per month depending on list size and program complexity. Full-funnel agencies like Structured Agency that cover paid acquisition alongside email and SMS typically range from $5,000 to $15,000 per month. Email-only execution agencies generally operate in the $2,000 to $6,000 range. Most agencies on this list require a discovery call before providing a specific proposal; many offer a complimentary retention audit as a scoping starting point. Verify all pricing directly before engaging, as rates are reviewed and updated regularly.
Sticky Digital and Andzen are both strong retention and lifecycle marketing agencies for ecommerce brands, but they serve different primary needs. Sticky Digital is a retention-only specialist with particular depth in subscription retention, replenishment modeling, and RFM-driven lifecycle campaigns for mid-market Shopify brands at $5M to $50M, operating with a 100 percent US-based in-house team and rated the number one retention agency in North America in 2023 and 2024. Andzen is a Klaviyo Elite Master Partner with global teams across Australia, the US, Canada, and Europe, focused on journey-based personalization and continuous lifecycle optimization through a Kaizen methodology for brands at $500K to $10M. If subscription retention and RFM modeling at the mid-market stage are the primary need, Sticky Digital is the more specialized match. If behavioral personalization across email, SMS, and CRM with a global team is the priority, Andzen is the stronger fit.
Retention marketing agencies serving Shopify brands typically offer some combination of email marketing strategy and campaign execution, SMS program management, lifecycle automation flows covering welcome series, abandoned cart, post-purchase, replenishment, and win-back sequences, customer segmentation and RFM modeling, loyalty program design and management, subscription retention and churn reduction programs, performance analytics and attribution reporting, and platform management across tools like Klaviyo, Yotpo, and Attentive. Service depth varies significantly by agency: Email Broadcast focuses on end-to-end email execution, Sticky Digital and Andzen operate as full lifecycle systems architects across multiple channels, and Structured Agency integrates retention into a broader paid acquisition and content program. Before engaging any agency, confirm which specific services are included in the base retainer versus scoped and priced separately.
A Shopify brand is typically ready to hire a retention marketing agency when it has at least $500K in annual revenue, a growing email list of 5,000 or more active subscribers, and a customer base where a meaningful share of revenue should be coming from repeat purchases but is not. Other clear signals include rising customer acquisition costs compressing margin, a post-purchase experience limited to a single transactional confirmation email, no active win-back or replenishment flows in place, and a loyalty or subscription program underperforming relative to the revenue base. Brands under $500K or with fewer than 1,000 email contacts are generally better served by a self-managed platform setup in Klaviyo or Omnisend — the order volume and purchase history needed to make agency-level lifecycle architecture pay off typically emerge closer to the $500K mark, and investing in agency fees before reaching it usually delays the list and data development that makes retention programs work in the first place.
