How does one become noticed in the digital noise? Anyone with an inbox knows that cutting through the chaos of information has become an art form of sorts.
Today’s challenge for email marketing agencies is more than creating an eye-catching subject line – they must build a firm that is part strategist, part storyteller, part data scientist. These are the modern-day couriers, not of parchment and wax seals, but of algorithms and human psychology.
Most importantly the messages can’t just be delivered, they have to linger! In this highly impersonal world companies struggle to create highly valued authentic relations and many believe that email remains one of the few digital channels where attention isn’t stolen but earned. Let’s take a look at the best ecommerce email marketing agencies, which understand this process and dominate this space.
Our List of Top 15 Best Ecommerce Email Marketing Agencies – 2025 Rankings
Let’s cut to the chase, we are looking at more than just revenue and ROI here! Our ranking of the best 15 ecommerce email marketing companies was created using a consistent and wide set of factors for each agency. Creating relations with clients often comes from an effective mix of soft and tech skills. We decided to analyze factors which take into account the efficiency as well as the client experience:
- Expertise and Specialization: Proficiency in leading email marketing tools (e.g. Klaviyo, Mailchimp, Omnisend) and solving ecommerce-specific challenges.
- Customization: Ability to create tailored strategies and integrate with existing marketing efforts.
- Track Record: Proven success through case studies, testimonials, and measurable results.
- Tools and Technology: Use of advanced analytics, automation, and reporting features.
- Analytics and Reporting: Transparent reporting, ROI tracking, and campaign health monitoring.
- Client Base and Results: Diversity and scale of clients, plus documented outcomes and revenue impact.
- Customer Support and Onboarding: Quality of onboarding, training, and ongoing support.
- Value for Price: Cost-effectiveness and ROI delivered to clients.
1. InboxArmy
Efficient, effective, and results-driven email marketing for everyone
They earned our top spot as the best ecommerce email marketing agency for 2025 through their commitment to integrity, transparency, and truly client-centric execution. In their own words, they deliver a vendor-agnostic, customized, and scalable service that adapts to each client’s unique goals.
Based in Grapevine, USA, InboxArmy is an industry-recognized, top-rated Ecommerce email agency co-founded by industry veteran Chris Donald, a pioneer in the space. The firm commands serious authority under the leadership of its awarded CEO, Scott Cohen – winner of the 2021 ANA Stefan Pollard Email Marketer of the Year and current co-chair of ANA’s Email Excellence Center.
InboxArmy stands out not only for its expertise but for its scale. With over 120 email specialists, they support a global client base of 5,000+ across more than 25 industries. That includes ecommerce, SaaS, higher education, retail, real estate, food and beverage, finance, healthcare, automotive, travel, and more, even niche verticals like pet care and manufacturing.
Despite an estimated annual revenue between $5.5 and $10 million, they remain open to startups while continuing to serve mid-sized businesses and enterprise-level clients alike. If you’re wondering who to trust with your email marketing, you’re looking at a team that delivers more than promises, they deliver performance.
InboxArmy services include:
- Running email campaigns,
- Specialized service in automation and lifecycle flow development,
- ESP migration (they work with over 40 ESPs),
- Email/SMS creativity and coding,
- Deliverability audits and optimization.
Notable clients: Spotify, Hilton, Airbnb, P&G, Universal, eBay
2. eCommerce Today
Deliver tailored, data-driven email campaigns and automation for ecommerce, with a focus on ROI and responsive management
Based in Brooklyn, USA, eCommerce Today stands out with a strong crew led by its co-founder and CEO Stefan Chiriacescu – an eCommerce Growth Strategist and Email Marketing Automation Expert. eCommerce Today supports brands with immersive email for ecommerce and DTC ventures. The firm serves hundreds of clients (including fast‑growing online retailers and mid‑sized marketplaces) through focus on lifecycle automation, promotional campaigns, and personalization. The team of around 30 is well‑versed in Klaviyo, Shopify Email, and Mailchimp.
Their services include:
- Campaign strategy and planning,
- Automation engineering,
- Deliverability tuning,
- Design & creative,
- A/B testing.
Notable clients: Cheeky Chickadee, The Oodie, BondiBoost
3. Fuel Made
Help ecommerce brands grow with email and CRO
Since 2013, San Diego based Fuel Made has worked with design‑forward ecommerce brands, generating over $50M in attributed revenue. With its dynamic CEO and founder Carson McComas taking the lead, the agency has been able to generate an onsite revenue jump of up to 30% for some of their clients. Their team of 20 specializes in Klaviyo and Shopify integrations, with custom templates and dynamic segmentation.
Their services are:
- Email & SMS strategy,
- Lifecycle campaigns,
- Advanced analytics,
- Klaviyo migrations,
- Creative design.
Notable clients: Beardbrand, Organic Basics, Pura Vida Bracelets
4. Email Aptitude
Performance-driven email and CRM for brands that want to scale
Email Aptitude is a boutique agency based in Toronto, Canada, which specializes in performance-driven email for ecommerce. With a tight-knit team of 10 and a Klaviyo focus, Email Aptitude optimizes promotional flows and cart recovery. This agency simply excels in turning overlooked touchpoints into revenue-generating opportunities. It earned its spot in our ranking due to a laser-focus on each individual client case.
Their services include:
- Automated lifecycle flows,
- Campaign execution,
- Audience segmentation,
- Deliverability consulting.
Notable clients: Brooks Running, Eddie Bauer, The Honest Company
5. Charle Agency
Data-driven retention and creative strategy for ambitious Shopify brands
London-based Charle Agency is a leading Shopify and Shopify Plus partner, renowned for blending creative design with rigorous data analysis to drive sustained ecommerce growth. Their diverse team brings over 50 years of combined experience, delivering high-performing email and SMS campaigns focused on retention, re-engagement, and customer lifetime value. Charle’s approach is collaborative and commercially minded—every project is tailored to the client’s goals, leveraging deep platform expertise and a passion for imaginative storytelling.
Charle Agency services:
- Email and SMS strategy
- Retention and loyalty program marketing
- Re-engagement campaigns
- Real-time segmentation and actionable insights
- Automation of email/SMS flows
- Continuous A/B testing and campaign optimization
- Shopify design, development, and CRO
Notable clients: Candy Kittens, Cambridge Satchel, and a portfolio of global DTC brands across fashion, food, beauty, and lifestyle sectors
6. Kas Andz Marketing Group
Transparent, data-focused operations and conversion optimization
This London based agency has served UK and EU ecommerce brands since 2018, delivering tailored email strategies. Their 25-person team is fluent in Klaviyo, Dotdigital, and Mailchimp. Kas Andz bridges European sophistication with scalable performance marketing, helping ecommerce brands sharpen retention and re-engagement flows. Their multi-ESP fluency and personalised approach make them a favourite among growth-minded founders.
Services:
- Full-funnel email/SMS,
- Lifecycle automation,
- ESP implementation,
- Design,
Notable clients: Revolut, Mediworld Ltd, The Essence Vault
7. Smart Mail
Personalised automation and lifecycle strategies for retention and loyalty
Based in San Francisco, Smart Mail brings a smart-data approach to email marketing since 2016. Their 40-person team crafts data-informed flows and deep segmentation. Data-centric approach takes the lead in this agency. Smart Mail turns analytics into automated flows that are aimed to convert and retain customers at a high rate. They stand out for their advanced segmentation and ability to scale intelligently across varied ecommerce verticals.
Services of SmartMail:
- Campaign & flow strategy,
- Advanced segmentation,
- Testing,
- Deliverability,
- SMS add-ons.
Notable clients: City Beach, Skechers, Edible Blooms
8. Rejoiner
Retention marketing and advanced segmentation to reduce cart abandonment
Based in Boston Rejoiner operates since 2012, pioneering cart-abandonment and lifecycle email strategies. It relies heavily on Klaviyo and Vero. With 30 specialists, they’ve served hundreds of brands. Rejoiner has earned a reputation for helping brands turn lost revenue into long-term loyalty. Their retention-focused strategies have been consistently outperforming industry benchmarks.
Rejoiner services:
- Lifecycle & cart flows,
- Campaign execution,
- Design,
- SMS integration.
Notable clients: AuthenTEAK, Ketone-IQ, Triumph Motorcycles
9. Chronos Agency
Lifecycle marketing and personalised automation for scalable growth
Based in Melbourne, Australia Chronos works across APAC and beyond on omnichannel marketing for lifestyle brands. Since 2019 their 20-person squad excels in Klaviyo and Campaign Monitor. Chronos combines clean creative with strategic flows tailored for APAC and global DTC brands. It is known to consistently deliver on engagement, retention, and lifetime value.
Their services:
- Email/SMS strategy,
- Lifecycle automation,
- CRO,
- Design & copy
Notable clients: MVMT, Snocks, Truly Beauty
10. Belardi Wong
Omnichannel strategy and industry expertise for premium brands
Based in Pasadena, USA Belardi Wong is a full-service direct-response agency since 2010. This firm masters email newsletters and lifecycle flows using Klaviyo, Mailchimp, but also a wide range of custom ESPs. The agency is a real veteran in direct response and omnichannel strategy – Belardi Wong expertly bridges email with catalog and SMS for high-touch brand storytelling. Their enterprise experience gives them a unique advantage in both traditional and digital ecosystems.
Their services:
- Email strategy,
- Creative production,
- Flows,
- Deliverability,
Notable clients: Untuckit, Crocs, Birkenstock
11. Jarrang
Long-term partnerships, audits, automation, and deliverability
UK based Jarrang builds ecommerce email and SMS programs with rich creative and performance analytics since 2014. Their 15-person team supports European clients across Klaviyo and Sendlane. As many clients agree, their boutique size allows for a highly-valued hands-on service. Jarrang is synonymous with strong execution in re-engagement and customer journey mapping.
Jarrang’s Services:
- Strategy, automation,
- Design,
- Copywriting,
- Deliverability,
- A/B testing.
Notable clients: Motability Operations, The Eden Project, Rick Stein Group
12. Andzen
Customer journey design and automation for revenue growth
New Zealand based Andzen, is an omnichannel performance agency working with brands in Australia/NZ. Their small team specializes in Klaviyo and SMSBump. Like other boutique agencies listed in our ranking, it is able to operate with a laser focus on personalization and owned-channel growth. Their cross-functional team blends tech and design for consistent ROI uplift.
Andzen services include:
- Email/SMS strategy,
- Flows,
- Campaign builds,
- Deliverability
Notable clients: Cheeky Chickadee, LSKD, The Dairy
13. Marmeto
Full-service email and SMS marketing for Shopify and D2C brands
Marmeto helps European DTC and marketplace brands scale email revenue with Klaviyo and Dotdigital. Their 18 specialists based in India drive design-smart campaigns. It is a fast-rising agency in the ecommerce space, which excels at combining creative with agile implementation for early-stage and mid-market brands. Their fresh, iterative approach to automation and design makes them a strong 2025 contender.
Marmeto services:
- Campaign strategy,
- Automation,
- Creative coding,
- Analytics,
Notable clients: The Man Company, Zouk, Bombay Shaving Company
14. SmartrMail
Easy automation and segmentation for smaller brands.
Founded in 2014, SmartrMail’s is an interesting contender with a dual service/platform model, which includes their own app as well as agency strategy services. A team of 25 specialists based in Canada focuses on small-to mid-size merchants. SmartrMail provides a unique hybrid model that empowers small merchants with enterprise-level email results. Their customer support and product innovation distinguish them in the SMB space.
SmartrMail services:
- Campaign automation,
- Segmentation,
- SMS add-ons,
Notable clients: Rollie Nation, Lorna Jane, The Dairy
15. Magnet Monster
Advanced automation and multi-channel integration for ecommerce growth.
This USA based agency launched in 2012 specializes in email capture strategies, such as popups, onboarding flows and lead magnets. Magnet Monster works through Klaviyo and Mailchimp. The agency is known for maximizing subscriber acquisition and onboarding sequences, as their proven capture-to-convert system earns measurable returns and positions them as a quiet powerhouse in email growth strategy.
Their services include:
- Signup optimization,
- Messaging flows,
- Reactivation campaigns,
- A/B testing.
Notable clients: Lounge Underwear, Represent Clothing, Gymshark
Summary
| # | Company | Founded | Estimated ROI | Estimated Annual Revenue | Clients | |
| 1 | InboxArmy | 2016 | https://www.linkedin.com/company/inbox-army/ | 38x – 50x | $5.5 – 10M | Airbnb, Hilton, P&G, Universal, Hasbro,
eBay, Spotify |
| 2 | eCommerce Today | 2015 | https://www.linkedin.com/company/ecommerce-today/ | 30x – 40x | $2M | Cheeky Chickadee, The Oodie, BondiBoost |
| 3 | Fuel Made | 2013 | https://www.linkedin.com/company/fuel-made/ | 32x – 45x | $3M | Beardbrand, Organic Basics, Pura Vida Bracelets |
| 4 | Email Aptitude (Tinuiti) | 2014 | https://www.linkedin.com/company/tinuiti/ | 28x – 42x | $2.5 – 10 M | Brooks Running, Eddie Bauer, The Honest Company |
| 5 | Charle Agency | 2018 | https://www.linkedin.com/company/wearecharle/ | 15x-20x | Not publicly reported | Shopify & Shopify Plus brands; global, multi-sector |
| 6 | Kas Andz Marketing Group | 2018 | https://www.linkedin.com/company/kas-andz-mg/ | 26x – 38x | $2M | Revolut, Mediworld Ltd, The Essence Vault |
| 7 | SmartMail | 2016 | https://www.linkedin.com/company/smartmail-io/ | 29x – 40x | $2.5M | City Beach, Skechers, Edible Blooms |
| 8 | Rejoiner | 2012 | https://www.linkedin.com/company/rejoiner/ | 31x – 44x | $2.2M | AuthenTEAK, Ketone-IQ, Triumph Motorcycles |
| 9 | Chronos Agency | 2019 | https://www.linkedin.com/company/chronosagency/ | 28x – 39x | $3M | MVMT, Snocks, Truly Beauty |
| 10 | Belardi Wong | 2010 | https://www.linkedin.com/company/belardi-wong/ | 33x – 45x | $7M | Untuckit, Crocs, Birkenstock |
| 11 | Jarrang | 2014 | https://www.linkedin.com/company/jarrang/ | 26x – 36x | $1.5M | Motability Operations, The Eden Project, Rick Stein Group |
| 12 | Andzen | 2013 | https://www.linkedin.com/company/andzen/ | 27x – 37x | $1.8M | Cheeky Chickadee, LSKD, The Dairy |
| 13 | Marmeto | 2020 | https://www.linkedin.com/company/marmeto/ | 25x – 34x | $2M | The Man Company, Zouk, Bombay Shaving Company |
| 14 | SmartrMail | 2014 | https://www.linkedin.com/company/smartrmail/ | 28x – 36x | $2.5M | Rollie Nation, Lorna Jane, The Dairy |
| 15 | Magnet Monster | 2012 | https://www.linkedin.com/company/magnetmonster/ | 30x – 42x | $1.2M | Lounge Underwear, Represent Clothing, Gymshark
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What makes the best ecommerce email marketing agencies?
The best ecommerce email marketing agencies consistently convert inbox engagement into predictable revenue. Achieving this requires more than eye-catching subject lines. The top-performing firms in our ranking stand out for their ability to meet measurable goals through strategic innovation, advanced automation, and client-specific execution.
The driving force behind their success lies in personalized communication. Revenue growth stems from messages that align with customer behavior and timing, not generic templates. These agencies excel at segmentation, behavioral triggers, and dynamic content, enabling ecommerce brands to reach the right audience with precision.
InboxArmy exemplifies this capability. Recognized as a leader in the space, the agency delivers tailored email programs that regularly generate high ROI, often exceeding 38x. With expertise across 25+ industries and a client base of over 5,000, InboxArmy combines technical execution with data-informed strategy. Their campaigns function as performance engines, automated, scalable, and built for long-term growth.
