Top 15 Best Ecommerce Email Marketing Agencies – 2025 Rankings

As of 2025, email marketing continues to generate a staggering $42 for every $1 spent, making it one of the most profitable digital channels for ecommerce. But not all agencies are built the same. 

If you're a brand looking to scale, optimize your retention, or build a high-performing lifecycle funnel, choosing the right partner is everything.

We didn’t just throw together a list based on Google searches. This ranking came together after weeks of structured evaluation. We analyzed over 50 agencies — filtering out platform tools, marketplaces, and one-person freelancers. We looked at case studies, campaign performance, A/B testing capabilities, ESP specialization (like Klaviyo or Salesforce), and industry recognition. Platforms like Clutch, DesignRush, Omnisend, and Apollo Technical provided verified reviews and client insight. We also reviewed agencies’ own public-facing materials — service documentation, thought leadership, and execution models.

Now let’s get into the best eCommerce email marketing agencies making waves in 2025.

Brief Overview

Before diving into the full details of each agency, here's a quick snapshot of the top performers in eCommerce email marketing for 2025. 

These agencies were selected based on hands-on experience with eCommerce brands, strategic email execution, lifecycle automation, and consistent client impact. Each one brings a different strength to the table — from high-volume campaign management to boutique lifecycle optimization.

This table gives you a surface-level view of who they are, where they’re based, and which brands trust them to handle retention and revenue through email.

15 Best Ecommerce Email Marketing Agencies in 2025

1. InboxArmy

LinkedIn: https://www.linkedin.com/company/inbox-army
Founded: 2016
Location: Grapevine, Texas, USA
Number of Employees: 51–200

InboxArmy is an award-winning ecommerce email agency headquartered in Grapevine, Texas. It was founded in 2016 by Chris Donald, a veteran in email marketing whose experience dates back to 1995. Today, the agency is led by CEO Scott Cohen, a recognized expert with two decades of strategic and technical email experience. With over 75 years of combined leadership expertise, InboxArmy stands out as the top email marketing agency in the U.S., serving mid-sized businesses to enterprise clients across more than 25 industries. These include ecommerce, SaaS, universities, retail, real estate, food and beverages, banking, healthcare, automotive, pet care, travel, and manufacturing.

The agency operates with a vendor-agnostic model and emphasizes transparency, rapid execution, and scalable service delivery. Their certified specialists support platforms like Salesforce Marketing Cloud and Marketo, making them especially valuable for organizations with complex martech environments. White-label services for agencies, dedicated account teams, and timezone-aligned availability reinforce their commitment to seamless execution and client trust.

Key Services:

• Email strategy and audit
• Campaign creation and management
• Email template production (custom, responsive, advanced features)
• Marketing automation and system integration
• Deliverability consulting and ESP migration
• Dedicated off-site email professionals
• SMS marketing and lifecycle marketing
• White-label services for agencies

Clients: Spotify, Airbnb, P&G, Ubisoft, Jockey, eBay
Client review: “They are our top go-to partner for all our email marketing needs.”  – Stella Carter, Director of Design & QA, ASPPH

2. Scalero

LinkedIn: https://www.linkedin.com/company/scalero/
Founded: 2020
Location: San Francisco, USA
Number of Employees: 10–50

Scalero operates more like a productized service partner than a traditional agency. Founded by Will Devlin and Andre Chagnon, it entered the market with a clear mission — to streamline email production and make the creative process scalable. While their footprint is smaller than some, they punch well above their weight with meticulously built systems and a lean operation.

Their estimated revenue remains undisclosed, but their consistent presence on Clutch’s top-rated lists hints at healthy traction. Scalero is especially popular among growing eCommerce brands that need on-demand design, coding, and strategy without bloated retainers.

Key Services:

• Modular email design and production
• Email template development
• Campaign strategy
• Copywriting and coding support
• CRM/ESP integration

Clients: Bloomscape, Living Spaces, Havenly
Client review: ''They proactively communicate throughout the project timeline and are keen to find solutions as needed.'' – Ivy K. CRM Associate, Dog Food Retailer

3. Rejoiner

LinkedIn: https://www.linkedin.com/company/rejoiner
Founded: 2011
Location: Providence, Rhode Island, USA
Number of Employees: 10–25

Rejoiner’s entire model centers around retention. Founder Mike Arsenault built the agency on the premise that most brands underutilize their email list. CEO Dan Katcher continues to evolve that vision, offering hands-on service that blends tech, psychology, and performance marketing.

They specialize in B2C eCommerce, focusing primarily on post-purchase flows, behavioral triggers, and advanced segmentation. Their estimated annual revenue falls in the $2–4 million range, driven mostly through retainer clients. What sets them apart is the focus on minimizing churn and maximizing LTV with surgical-level email strategy.

Key Services:

• Abandoned cart email recovery
• Customer win-back campaigns
• Transactional and behavior-triggered sequences
• Revenue attribution reporting
• ESP and data stack consultation

Clients: Hydro Flask, Titleist, Peak Design
Client review: "Rejoiner is super responsive, super hands on, always willing to work with us to find solutions when there isn't one out of the box." – Adam Saraceno, CMO, Peak Design

4. MH Digital

LinkedIn: https://www.linkedin.com/company/mhdigitalgroup
Founded: 2017
Location: Denver, Colorado, USA
Number of Employees: 10–30

MH Digital positions itself at the crossroads of strategy and execution. Founded by Matt Harris (who also serves as CEO), the agency has carved a niche in the Klaviyo space — particularly with Shopify and WooCommerce merchants. With estimated revenues around $1–2 million annually, they offer full-spectrum email services with strong attention to creative polish.

What makes MH Digital a contender among the best eCommerce email marketing agencies is their hybrid capacity — part technical, part creative. Brands that don’t have internal teams rely on MH Digital for everything from wireframing emails to full campaign orchestration.

Key Services:

• Klaviyo campaign management
• Lifecycle automation
• List hygiene and deliverability
• Copywriting and custom template design
• CRO-focused email optimization

Clients: MeUndies, Bombas, Baboon to the Moon
Client review: "I don't think I've ever worked with an agency that was as easy to collaborate with as MH Digital." – Jarred Gammon, Senior Lifecycle Marketing Manager, UnitedMasters

5. DIDO Agency

LinkedIn: https://www.linkedin.com/company/didoagency
Founded: 2019
Location: Brooklyn, New York, USA
Number of Employees: 15–40

Founded by David Karetsky, DIDO Agency runs on a performance-first model. Known for aggressive list building and data-centric campaign planning, they’re ideal for eCommerce brands looking to scale email revenue quickly. The agency has grown steadily under Karetsky’s leadership, reportedly generating over $3 million in yearly revenue.

They take a highly collaborative stance, offering Slack channel access, weekly performance reports, and frequent testing cycles. That responsiveness — and their lean but sharp creative team — helps them maintain long-term client relationships.

Key Services:

• Conversion-driven email and SMS
• Customer segmentation and dynamic content
• Campaign calendar planning
• Deliverability improvement
• eCommerce revenue reporting

Clients: DripDrop, Nixon, QALO
Client review: "Their creativity and innovation are a breath of fresh air, and we're always impressed with their work quality." – Vitalii Hlukhovskyi, Marketing Manager, OSSA FRAMES INC

6. Ryzeo

LinkedIn: https://www.linkedin.com/company/ryzeo
Founded: 2012
Location: San Francisco, California, USA
Number of Employees: 10–20

Ryzeo is a boutique email marketing agency based in San Francisco, focused entirely on eCommerce lifecycle strategy. The company takes a data-first approach, combining real-time behavioral triggers with full-funnel automation to support customer acquisition, engagement, and retention. Its leadership includes seasoned marketers and engineers who specialize in building custom email solutions that align with business operations.

Ryzeo’s agile model appeals to growing eCommerce businesses looking for personalized service without the overhead of larger firms. Their systems allow for seamless ESP integrations and flexible experimentation, making one of the best eCommerce email marketing agencies for product-led brands that need consistent campaign iteration.

Key Services:

• Full email lifecycle campaign strategy
• Real-time behavioral email automation
• Custom template creation and testing
• Lead capture and segmentation
• ESP platform integration and support

Clients: Chef Works, WhiskerCloud, Purism
Client review: “Extra sales are rolling in... highly recommend.” – Andrew Shand, owner, DOWNUNDER PILOTSHOP

7. Optimite

LinkedIn: https://www.linkedin.com/company/optimite
Founded: 2019
Location: Gurugram, India
Number of Employees: 20–50

Optimite is a cost-effective email marketing agency serving eCommerce clients worldwide, with a strong presence on Clutch and other review platforms. Founded in 2019, the agency focuses heavily on Klaviyo and SMS automation, positioning itself as a practical solution for mid-sized brands and Shopify stores aiming to scale customer engagement affordably.

Their team emphasizes quick turnaround, clean design systems, and performance optimization. Optimite has built a strong reputation for delivering full-service retention marketing at a fraction of the cost of U.S.-based agencies, without sacrificing quality or reliability.

Key Services:

• Klaviyo setup and automation
• SMS and email campaign execution
• Email list segmentation and hygiene
• eCommerce-focused template design
• A/B testing and conversion optimization

Clients: Parachute, Holistic Habitat, Glamnetic
Client review: "The quality and timeliness of deliverables are most impressive." – Zack P., Head of Growth, Avantera Health

8. Email Broadcast

LinkedIn: https://www.linkedin.com/company/emailbroadcast
Founded: 2000
Location: Seattle, Washington, USA
Number of Employees: 10–25

Email Broadcast is one of the longest-running agencies on this list, founded in 2000 with a singular focus on email marketing. Based in Seattle, the agency brings two decades of experience in campaign execution, copywriting, and list strategy for eCommerce and service-based businesses alike.

Their team offers a tightly managed, hands-on service that handles every step—from creative development to performance tracking. Known for reliability and clear communication, Email Broadcast is often chosen by brands looking to outsource their entire email channel to a responsive, results-driven team.

Key Services:

• End-to-end email marketing management
• Strategic campaign planning
• Conversion-focused copywriting
• Custom design and implementation
• Performance reporting and optimization

Clients: Red Beard Sailing, La Tourangelle, PaySimple
Client review: ''They work comprehensively and fast.'' – Sean Lee, President, Seven Coffee Roasters

9. SmartSites

LinkedIn: https://www.linkedin.com/company/smartsites
Founded: 2011
Location: Paramus, New Jersey, USA
Number of Employees: 100–200

SmartSites is a multi-channel digital agency offering a deep bench of services across email, SEO, and paid media. While their roots are in full-funnel marketing, their email marketing arm has grown into a standalone service praised for data-driven lifecycle campaigns, particularly in eCommerce.

The agency focuses on campaign architecture, conversion tracking, and personalization. With over a decade of experience and consistent recognition from platforms like DesignRush, SmartSites is a strong option for brands looking to tie their email strategy into broader performance marketing goals.

Key Services:

• eCommerce email automation
• Personalized product recommendations
• Email/SMS cross-channel workflows
• Performance analytics and revenue attribution
• Template design and development

Clients: Cub Cadet, Rakuten, Harvard University
Client review: "SmartSites continuously tweaks campaigns to get the most for our money." – Anonymous, Executive, LINK Necklaces

10. Jarrang

LinkedIn: https://www.linkedin.com/company/jarrang
Founded: 2003
Location: London, UK
Number of Employees: 15–50

Jarrang is a UK-based email marketing agency known for its hands-on, performance-driven approach to customer lifecycle strategy. Founded in 2003 by Stafford Sumner, the agency focuses on long-term retention programs, advanced deliverability, and high-impact campaign execution. With a core team of under 50 professionals, Jarrang supports both ecommerce and enterprise clients, primarily across the UK and Europe.

Their work stands out for deep audit processes, personalized segmentation, and meticulous deployment. Jarrang doesn’t rely on templates or shortcuts—they emphasize precision in strategy, design, and testing to drive measurable results across multiple ESPs, including Klaviyo and Sendlane.

Key Services:

• Email and SMS strategy and automation
• Lifecycle flows and journey mapping
• Advanced segmentation and A/B testing
• Campaign build, QA, and deployment
• Deliverability consulting and reporting

Clients: The Eden Project, Motability Operations, Exclusive Collection, Vax, Seasalt Cornwall
Client review: “Jarrang is an email marketing agency for the long term. They evolve to support your business needs. Great value, great team, and great results.” -?Danielle Torr, Head of Marketing, Motability Operations

11. Enflow Digital

LinkedIn: https://www.linkedin.com/company/enflowdigital
Founded: 2020
Location: Vilnius, Lithuania
Number of Employees: 10–20

Enflow Digital is a boutique eCommerce email and SMS agency based in Lithuania. Founded in 2020, the agency quickly established a reputation for precision A/B testing and data-backed campaign performance. Its leadership team comes from analytics and CRO backgrounds, which influences their highly experimental style.

They serve a mix of local EU-based eCommerce businesses and international Shopify stores looking for flexible support. Enflow’s workflows are built around behavioral triggers, and they maintain a clear focus on iterative testing to maximize conversion and retention.

Key Services:

• Email and SMS strategy for eCommerce
• A/B testing and performance audits
• Behavioral segmentation and triggers
• Campaign execution and automation
• Klaviyo, Omnisend, and SMSBump setup

Clients: Sportland, Juice Plus+, Nida Design
Client review: "They really helped us improve our Klaviyo performance and helped setup very profitable flows for us." – Amr Siam, Founder of GoDoggy.JP

12. Invisible Brands

LinkedIn: https://www.linkedin.com/company/invisible-brands-gmbh
Founded: 2017
Location: Berlin, Germany
Number of Employees: 15–30

Invisible Brands operates as a full-service email and SMS marketing agency out of Berlin, serving eCommerce brands across Europe and the U.S. Their model emphasizes transparent reporting and cross-channel tracking, making them a preferred choice for data-driven eCommerce founders.

Founded in 2017 by a collective of email and ad specialists, the agency has grown steadily by prioritizing lean workflows, segment-specific messaging, and flexible automation stacks. They operate across Klaviyo, ActiveCampaign, and Postscript, focusing on maximizing revenue per subscriber.

Key Services:

• Email/SMS lifecycle automation
• Transparent campaign reporting
• List hygiene and growth strategies
• Visual and copy asset development
• Strategic deliverability management

Clients: Heimdal Security, Buduaar, Callowfit
Client review: "I am the owner of the Australian Menswear brand Kings Cross Clothing, and I can definitely say that these guys have helped me out massively!" – Anouar Ben Saied, Owner, Kings Cross Clothing

13. StudioForty9

LinkedIn: https://www.linkedin.com/company/studioforty9
Founded: 2008
Location: Cork, Ireland
Number of Employees: 20–50

StudioForty9 is a performance marketing agency headquartered in Cork, with a strong specialty in eCommerce lifecycle campaigns. Established in 2008, it has served many of Ireland’s leading online retailers, integrating email marketing into broader digital commerce strategies.

Their email division focuses on personalized automation flows, seasonal campaign planning, and CRM-driven engagement. The agency often partners with Magento, WooCommerce, and Shopify platforms, supporting brands in both English and bilingual markets.

Key Services:

• eCommerce lifecycle campaign strategy
• Email/CRM integrations
• Personalized automation flows
• Retention-focused seasonal campaigns
• Email list growth and re-engagement

Clients: Kilkenny Design, McGuirks Golf, Meaghers Pharmacy
Client review: "Studioforty9 have been providing a great service to us and our members for over 10 years." – Anonymous, Retail Excellence Ireland

14. Yummyemail

LinkedIn: https://www.linkedin.com/company/yummyg
Founded: 2021
Location: Vilnius, Lithuania
Number of Employees: 10–15

Yummyemail is a specialized email automation agency based in Warsaw. Despite being a newer entrant, it has earned recognition in automation circles for its consistent and methodical approach to building flows that convert.

The agency works primarily with Klaviyo and ActiveCampaign, developing pre- and post-purchase flows for DTC eCommerce brands. Yummyemail’s process emphasizes campaign predictability and efficiency, favoring modular email frameworks over flashy one-offs.

Key Services:

• Email automation design and execution
• Abandoned cart and win-back flows
• Predictive customer journey mapping
• Modular template development
• Campaign timing optimization

Clients: Code & Quill, Zaya, SkinList
Client review: N/A

15. Add People

LinkedIn: https://www.linkedin.com/company/add-people
Founded: 2002
Location: Manchester, United Kingdom
Number of Employees: 100–250

Add People is a full-service digital agency based in the UK with a strong focus on SMEs. With over 20 years in the industry, they offer email marketing as part of an integrated package that includes PPC, SEO, and web development. Recognized on Omnisend’s 2025 list, their email services focus on growth-stage eCommerce businesses.

The agency is especially popular among small to mid-size stores that need multi-channel marketing strategy and implementation from a single provider. Their email marketing team emphasizes simplicity, consistency, and accessible pricing.

Key Services:

• Email campaign planning and execution
• eCommerce-focused automation
• List management and segmentation
• PPC, SEO, and full web support
• Performance tracking across channels

Clients: Tiger Sheds, Rugs Direct, Grand Illusions
Client review: “Add People has exceeded all our expectations” – Jules Shepard, Anonymous

Final Thoughts

Choosing the right email marketing agency can make the difference between steady growth and real momentum. InboxArmy, for example, has built a strong reputation in 2025 for its deep focus on Klaviyo and its ability to scale ecommerce email programs with precision. Each agency on this list brings something different to the table, some excel at fast-turnaround campaigns, others are masters of automation flows or retention strategy. It really comes down to what stage your ecommerce brand is in and what kind of support you're after.

Simply put, the best ecommerce email marketing agencies in 2025 are the ones that understand how to move the needle — whether that's boosting repeat purchases, recovering abandoned carts, or building out scalable systems that run on autopilot. No fluff, no gimmicks — just real teams doing solid work.

If you're serious about getting more from your email channel this year, you won’t go wrong starting with one of these.