Top 10 Email Marketing Agencies & Companies

Written by: Chris Donald

Published on: 26-06-2023

Chris is Managing Partner at InboxArmy and has more than 25 years of experience in email marketing

Email marketing is one of the worst-kept secrets of the digital marketing era. Simply because of the insane ROI it provides – $36 for every $1 spent. 

As reported by Litmus, here’s the ROI for different industries:

  • Retail, e-commerce, and consumer goods: 45:1
  • Marketing, PR, and Advertising agency: 42:1
  • Software and technology: 36:1
  • Media, publishing, events, sports, and entertainment: 32:1

Of course, this only holds if you have the right resources with proven capabilities and expertise – including your email marketing agency choice.

But with so many email marketing agencies present today, where do you begin?

In this blog, we help you dive right in with the list of the Top email marketing agencies. Let’s get started!

Our Criteria For Selecting Top Email Marketing Companies

To ensure our list of Agencies stands up to scrutiny we adopted a rigorous selection criterion that emphasizes specialized excellence.

The idea?

 We only sought out agencies for whom email marketing isn’t merely a side offering but the core of their expertise.

We did this to guarantee that the agencies spotlighted here don’t just include email marketing in their roster of services but are true leaders in the field. Our focus remained on identifying those agencies that have honed their skills and dedicated their resources to understanding and executing effective email campaigns.

Top Email Marketing Companies & Agencies
1) InboxArmy
2) Inbox Collective
3) Holistic Email Marketing
4) Email Monday
5) RPE Origin
6) Lets Talk Strategy
7) Action Rocket
8) Rejoiner
9) Smartmail
10) InboxGroup

Top Email Marketing Agencies

10) InboxGroup


Pricing: Contact them – Custom Pricing
Major Clients: RC Juice, BOIE USA, Bear Fox Marketing
HeadQuarters Location: Dallas USA
Experience: 10+ Years

InboxGroup, operating as part of InboxArmy, one of the best email marketing companies in the US with a wide range of offerings. This agency’s holistic approach, spanning strategic planning to effective execution, distinguishes it in the email marketing landscape.

Where They Excel

  • Managed Email Marketing
  • Email Marketing Strategy
  • Email Marketing Creative and Development
  • Marketing Automation
  • Custom ESP Integration
  • Mobile Email
  • Email List Management
  • Email Deployment

Key Industries They Serve

  • Travel and Hospitality
  • Digital Marketplaces
  • Music and Entertainment
  • Fashion and Apparels
  • FMCG
  • Technology
  • Banking and Insurance
  • Gaming
  • Online Marketing

Key Strengths

Development of ROI-driven email programs, displaying their commitment to fostering business growth and contributing to enhancing their clients’ bottom line.

Operation as an ESP-agnostic email marketing firm, offering flexibility to cater to diverse client needs and systems without vendor constraints.

Proficient management and nurturing of client relationships, emphasizing customer retention and brand awareness in their marketing strategy.

Expanding clients’ digital footprints by integrating email marketing with social media, broadening their audiences and enhancing their online presence.

InboxGroup’s balance between quality and affordability truly sets it apart. They provide a feature-rich service that remains user-friendly and reasonably priced, ensuring that a broad range of clients with varied needs and budgets can benefit from their expertise.

This commitment to affordable quality and their flexible, customer-centric approach make InboxGroup an industry-defining email marketing agency.

9) Holistic Email Marketing

Holistic Email Marketing

Pricing: Contact them – Custom Pricing
Major Clients: BARCLAYS, Facebook, Pandora, Ralph Lauren, Kate Spade
HeadQuarters Location: London
Experience: 10+ Years

Meet Holistic Email Marketing, one of the top email marketing companies, has redefined email marketing by taking a comprehensive approach centered on customer journeys.

Their magic formula? Melding data, technology, strategy, creativity, personalization, and psychology into a unified force. This unique approach positions them as an agency that’s more than just about open rates and click-through percentages—it’s about delivering tangible results.

Where They Excel

  • Email Marketing Consulting
  • Email Deliverability Audit
  • Email Marketing Vendor Selection
  • Email Marketing Optimization
  • Email Marketing Strategy & Audit
  • Training and Workshops

Key Industries They Serve

  • Digital Marketing services
  • Beverages
  • Travel and tourism
  • Insurance
  • Events management
  • Online marketplaces
  • Charities
  • Direct Marketing

Key Strengths

Guided by Kath Pay, a recognized authority with over two decades of experience, a ten-year tenure on the UK DMA Email Marketing Council, and a prominent role judging the DMA Awards.

Proven track record of developing effective eCRM and comprehensive email marketing strategies that go beyond conventional measures and drive solid outcomes.

Kath’s contributions were recognized with the EEC’s Thought Leader of the Year Award in 2021, and being a finalist in 2019 speaks volumes about the respect she garners in the industry.

Kath’s best-selling book, “Holistic Email Marketing: A practical philosophy to revolutionize your business and delight your customers”, underscores the agency’s commitment to educating and empowering its clients.

Stand-Out Quality

Holistic Email Marketing shines through Kath Pay’s dedication to disseminating knowledge. Beyond leading the agency, Kath’s role as the principal trainer for Econsultancy and her engagement with platforms such as IDM, Digital Doughnut, B2B Marketing, and Marketers showcases her commitment to education in the field. 

This dedication to spreading knowledge and honing the skills of countless individuals and organizations sets Holistic Email Marketing apart from other agencies.

Kath Pay, an industry titan, steers the ship with an unwavering focus on the holistic customer journey, making this agency a standout.

8) Email Monday


Pricing: Contact them – Custom Pricing
Major Clients: AEGON, Unilever, Roche, KLM, Heineken.
HeadQuarters Location: Netherlands
Experience:  10+ Years

Where They Excel

  • Email marketing strategy
  • Email Service Provider selection
  • Email design and production
  • Email Campaign Optimization
  • Customer Loyalty & lead nurturing campaigns
  • Opt-in List Growth
  • Email Campaign Review
  • Training, coaching, and Workshops
  • Writing: Articles, Reports, and White papers

Key Industries They Serve

  • Insurance and Asset Management
  • Consumer Goods
  • Healthcare
  • Airlines
  • Beverages

7) RPE Origin

RPE Origin

Pricing: Contact them – Custom Pricing
Major Clients: Skype, Capital One, FeedX, Nestle, Legalzoom, Verizon
HeadQuarters Location: Los Angeles, CA, USA
Experience: 10+ years

Say hello to RPE Origin, one of the top email marketing agencies in USA that’s carving out a unique space for itself..

Built on a solid foundation of strategic thinking, versatile execution, and comprehensive insights, RPE Origin is about delivering consistent results while setting its clients on the path to ongoing success.

Where They Excel

  • Email Strategy & Planning
  • Content & Messaging
  • ESP Migration
  • Technology Services
  • Email Platform Optimization
  • Data Activation
  • Communication Development

Key Industries They Serve

  • Communication technology
  • Consumer Discretionary
  • Financial services
  • Retail Banking
  • Transportation & Courier
  • Food and beverages
  • Industrial Services

Key Strengths

Fostering a technology-agnostic approach, ensuring smooth integration into various marketing environments – a testament to their flexibility.

A team comprising top-notch subject matter experts, each with a deep well of experience from projects across diverse verticals.

A unique service model that combines low overheads with high-quality experts, resulting in efficient and effective solutions for diverse clients across multiple marketing program scales.

Boasting a broad skill set, from design, illustration, and animation to crafting compelling communications that perfectly balance originality and familiarity.

Their formidable experience with RFPs, migrations, and technical aspects across industries makes them stand tall in the field.

Stand-Out Quality

RPE Origin’s heart beats for one thing – understanding, improving, and acting on customer engagement. They lean heavily into insights and analysis, refining and optimizing their strategies ceaselessly.

The most striking quality, however, is their people-centric approach. Despite being able to navigate the intricate digital landscape with finesse, they never lose sight of the people they’re serving – their clients.

This harmonious blend of technology and human touch makes RPE Origin a trailblazer in email marketing.

6) Lets Talk Strategy

Lets talk strategy

Pricing: Contact them – Custom Pricing
HeadQuarters Location: London
Experience:  10+ years

When it comes to boosting profitability through top-notch digital marketing strategies, one name stands out:

Let’s Talk Strategy, one of the top-notch eCommerce email marketing firms based in London and Lisbon, boasts rich experience collaborating with small and large brands across a wide range of industries in the B2B and B2C arenas.

Where They Excel

  • Email Strategy
  • Marketing Strategy
  • Customer Behavior Analysis
  • Training & Workshops
  • Thought Leadership
  • Public Speaking

Key Industries They Serve

  • Energy
  • Hospitality
  • Travel
  • Fashion and Retail

Key Strengths

They are renowned for delivering marketing consultancy services to organizations throughout Europe, making them a key player in the international market.

Their focus is on crafting top-tier strategies and making a tangible contribution to an organization’s bottom line.

Guided by Jenna Tiffany, Founder and Strategy Director, a Chartered Marketer, and a Fellow at the IDM, known for designing best-in-class online marketing strategies and campaigns.

A proven track record of providing a substantial return on investment both in the UK and internationally.

Stand-Out Quality

At the crux of Let’s Talk Strategy’s uniqueness is its knack for blending traditional techniques with groundbreaking approaches under the astute leadership of Jenna Tiffany.

Her unyielding dedication to enhancing the profitability of clients by delivering successful strategies truly sets this agency apart.

With this distinctive mix of innovation and expertise, Let’s Talk Strategy has firmly cemented its place as a key player in the email marketing landscape.

5) Action Rocket

Action Rocket

Pricing: Contact them – Custom Pricing
Major Clients: Trainline, Henkel, American Express, BBC
HeadQuarters Location: London
Experience: 10+ years

Based in London, Action Rocket, one of the premium email marketing agencies, stands out in the email industry in 2024. This enthusiastic team of marketers, designers, copywriters, and coders combines their talents to create award-winning global marketing campaigns.

Where They Excel

  • Campaign Strategy
  • Campaign Design
  • Campaign Development
  • Email Design Systems
  • Workshops and Training
  • Creative Services
  • Strategic Storytelling
  • Email Campaign Creation
  • CRM Program Creation

Key Industries They Serve

  • News and Broadcasting
  • Banking and Finance
  • Beverages
  • Fashion and Clothing
  • Casual Dining
  • Travel and Leisure
  • Gaming and Entertainment

Key Strengths

Their distinctive approach goes beyond service provision, focusing on strategic thinking, creative ideas, and thoughtfully designed customer journeys.

A strong commitment to understanding clients’ challenges, primary goals, and vision helps them provide bespoke support and impactful solutions.

Catering to a diverse clientele that includes brands, marketing agencies, and email service providers by creating meticulous strategic content plans and digital campaigns that align with each client’s unique needs.

A persistent culture of staying up-to-date with the best practices in the field, including the latest in HTML, CSS, mobile, accessibility, and responsiveness.

Stand-Out Quality

What makes Action Rocket stand out is its unique blend of strategic, goal-oriented approach and boutique, the custom-tailored experience they offer.

Their knack for integrating creativity with technical expertise and keeping themselves updated with the latest trends ensures their clients get the cream of the crop in email marketing.

With their focus on tailor-made solutions and a firm finger on the pulse of technical advancements, Action Rocket emerged as a distinguished player in the email industry in 2024.

4) Rejoiner


Pricing: Core: Plan $25/mo & Scale Plan $1500/mo
Major Clients: Bavsound, Motherdirt, Triumph
HeadQuarters Location: Boston, Massachusetts, United States
Experience: 10+ Years

As one of the top email marketing companies for eCommerce in the USA, Rejoiner has mastered the art of turning passive browser interactions into rewarding customer relationships with their wide array of tools.

Where They Excel

  • Testing & Optimization
  • Copywriting
  • Deliverability Monitoring
  • Content Strategy
  • Day-to-Day Management
  • SMS Production
  • Retention Strategy
  • Email Development
  • Performance Reporting

Key Industries They Serve

  • E-commerce
  • Retail
  • Wood and Furniture
  • Direct Marketing
  • Nutrition
  • Sports Equipment
  • Fashion
  • Beverages

Key Strengths

A unique lifecycle email marketing software forms the core of Rejoiner’s approach. This intuitive tool helps online retailers recapture potential customers who might have abandoned their shopping carts, emphasizing their commitment to maximizing client revenue in a nuanced and proactive way.

A team of email marketing specialist with a combined experience of 40+ years, whose synergistic blend of innovation and efficiency has led to an average increase of last-click revenue from email and SMS marketing by 30% or more.

A battle-tested methodology is tailor-made for each client’s unique needs. This has guided over 300 brands to make email a steady and reliable revenue stream, highlighting Rejoiner’s versatile expertise.

Impressive consulting services provide hands-on guidance, giving businesses the practical skills required to navigate the complex world of email marketing.

Stand-Out Quality

Rejoiner shines bright in the industry, not just for its unique software and strategic approach but also for its consulting services that offer hands-on guidance to businesses. Their commitment to making a tangible difference is evident in their proven track record of achieving up to a 30% increase in email revenue for clients. With over 500 brands seeking their services, Rejoiner stands tall as an industry leader in 2024.

3) Smartmail


Pricing: Contact them – Custom Pricing
Major Clients: bROWZE, Choxi, Millers Woman, Digital Supply USA, Lowes, and Sunski
HeadQuarters Location: New York, USA
Experience: 10+ Years

Established as one of the top email marketing companies for eCommerce in the USA, SmartMail’s vast expertise spans diverse areas, offering solutions for campaign management, automation, and list growth. Their adaptability and breadth of knowledge have made them a force to be reckoned with in the industry in 2024.

Where They Excel

  • Campaign Management
  • Automation Setup
  • Email Audit (Free)

Key Industries They Serve

  • Technology and Gadgets
  • Fashion and Retail
  • Petcare
  • Automobiles
  • Home Decor
  • Books and stationery

Key Strengths

Offering two cornerstone solutions: a robust campaign management solution providing continual oversight to ensure the successful implementation of a client’s monthly email strategy and an Automation Setup solution offering a one-time service to introduce or optimize email automation and flows.

The flexibility allows businesses to order custom campaigns on demand, thereby accommodating fluctuating market demands without the constraints of long-term commitments.

Efficient delivery timelines, with a maximum of four days for a single campaign and seven days for automation setup, underlining their commitment to timely service delivery.

A transparent and straightforward pricing structure, with a ‘pay for what you get’ policy, ensures clients are charged only for services availed.

Stand-Out Quality

The stand-out quality of SmartMail is undoubtedly its transparent pricing structure. Their commitment to offering value for money is evident in their ‘pay for what you get’ policy, charging a flat fee per email campaign and newsletter, and for the one-time setup of automation. This level of financial transparency, combined with their comprehensive services and flexibility, sets SmartMail apart in the email industry in 2024.

2) Inbox Collective

Pricing: $3000 – $3500
Major Clients: The Intelligence, Anchorage Daily News, the Atlanta Journal-Constitution, and Charlotte Ledger, Leakey Foundation and Sightline Institute.
HeadQuarters Location:
New York, USA
Experience: 10 Years +

The second name on our list isn’t an agency but a one-man marvel: Inbox Collective. Steering this remarkable venture is the seasoned email marketing wizard Dan Oshinsky, who set sail on this journey in 2019. Let’s pull back the curtain on this unconventional powerhouse.

Where They Excel

  • Launching and promoting new newsletters
  • Increasing reader engagement
  • Monetizing email programs
  • Onboarding new subscribers and winning back inactive readers
  • Fixing email deliverability issues
  • Implementing the right email marketing technology
  • Testing and optimizing email campaigns

Key Industries They Serve

  • Newsrooms
  • Non-profits
  • Indie newsletters

Key Strengths

Oshinsky’s sterling resume, including his initial stint as the founding Newsletter Editor at BuzzFeed and as the pioneer Director of Newsletters at The New Yorker.

The cherished ‘Not a Newsletter,’ a monthly guide, has become a beacon for many seeking advice and trends in email marketing, manifesting Oshinsky’s esteemed position in the industry.

The services offered: coaching calls, strategy audits, workshops, and paid talks, all tailored for client-specific needs.

Oshinsky’s global recognition and presence in high-profile events like Litmus Live in Boston, Email Summit DK in Odense, Denmark, and the Email Marketing Summit in Brisbane, Australia.

Stand-Out Quality

While Inbox Collective may be lean, it holds a heavyweight reputation. With successful collaborations with over 100 companies, ranging from large newsrooms to indie newsletters, it has displayed its versatility and prowess.

However, what truly sets it apart is its laser-like focus on aiding newsrooms, non-profits, and indie newsletters. Oshinsky’s singular aim is to help these entities build, grow, optimize, and monetize their email strategies, promising a personalized, hands-on approach that fits each unique need like a glove.

This undiluted attention to client success makes Inbox Collective a shining beacon in the email industry of 2024.

1) InboxArmyInboxArmy

Pricing: Custom Pricing
Major Clients: eBay, Hilton , Spotify, Air BnB, Zappos, Sherwin WIlliams, Jockey, P&G
HeadQuarters Location: Grapevine, TX, USA
Experience: 10+ Years

Chris Donald, our founder, sent his first email campaign in 1995. InboxArmy, one of the top email marketing companies in the USA, came into existence in 2016. We’ve been going strong ever since, continuously adapting and refining our strategies. We have grown into a powerhouse over the years and have a unique knack as one of the best full-service email marketing agencies in USA.

Where We Excel

Key Industries We Serve

  • eCommerce
  • Education
  • Financial services and Banks
  • Information technology
  • Medical
  • Real estate
  • Travel and tourism
  • Beverages
  • Digital Agencies

Key Strengths

A seasoned veteran of the field, boasting a diverse clientele of over 5000 worldwide, from sprouting startups to established enterprises.

Our formidable team strength of 120 email marketing hotshots, each equipped with in-depth knowledge 

We are renowned for our ability to design, launch, and manage a wide spectrum of email marketing campaigns seamlessly and at scale.

Stand-Out Quality

What really sets InboxArmy apart? It’s our undivided dedication to our client’s needs. Imagine an agency that doesn’t tie you to a specific platform. That’s us with our 100% ESP-agnostic approach. 

Our attentiveness and supportive nature are truly commendable. We focus on fostering client success without any hidden costs or enforced long-term contracts. 

Moreover, we’re admired for our well-structured, bulletproof processes, which have been effectively implemented across over 25 different verticals.

What Is An Email Marketing Agency?

An email marketing agency comprises experts in email marketing techniques and strategies who help businesses across industries, sizes, and budgets to drive their marketing objectives through email.

Equipped with email marketing specialists in their respective domains, it provides businesses with tailored solutions to address email marketing needs from start to finish.

Reputed and well-established agencies consistently leverage the most advanced and appropriate software to craft impactful email campaigns that generate high open and conversion rates. They also provide ongoing strategy and support to ensure the email campaigns meet their client’s objectives.

Notably, most agencies provide project and retainer services, allowing you to tailor the services to their needs with scalability. These will be discussed in more detail later in this article.

What To Look For In An Email Marketing Company?


Choosing the right agency can be a game-changer for your business, propelling it toward unprecedented growth. In this section, we break down key factors you need to consider to ensure you’re selecting an agency that aligns with your business goals, understands your industry, and can deliver impactful results.

Experience with Email Marketing Services

The agency should have years of experience in your industry. This guarantees they’ve encountered and successfully navigated a wide variety of challenges.

Their team should have diverse areas of expertise, including design, copywriting, data analysis, and other digital marketing services.

Industry Knowledge

An ideal agency should have a deep understanding of your industry to craft effective campaigns.

Check if they have a proven track record of working with businesses in your industry and their results.

Email Deliverability

The agency should maintain high email deliverability rates to ensure your emails reach the intended inboxes and don’t get stuck in spam filters.

They should know practices like list cleaning, authentication, and reputation management.

Data-driven Approach

The agency should use data to inform strategies, segment audiences, personalize campaigns, and measure results.

They should be well-versed in data analysis and interpretation to improve the effectiveness of campaigns.

Marketing Automation Capabilities

They must be able to automate email campaigns, customer segmentation, and lead nurturing to make your email marketing more efficient.

They should have experience with email marketing automation platforms like Mailchimp, Constant Contact, or Sendinblue.

Creative Design and Copywriting

The agency should have a creative team capable of producing visually appealing email designs that align with your brand identity.

Their copywriters should craft compelling, engaging copy that encourages readers to take action.

Customization and Personalization

The agency should be able to design personalized email campaigns that resonate with your target audience based on data like browsing habits, purchase history, and personal preferences.

Performance Tracking and Reporting

The agency should offer comprehensive reporting detailing campaign performance against key metrics like open rates, click-through rates, and conversion rates.

Reports should be clear, easy to understand, and provided at a frequency that suits you.

GDPR and Data Privacy Compliance

The agency should strictly adhere to data privacy laws, ensuring your email activities are GDPR-compliant and comply with other relevant regulations.

They should guide you through collecting and storing data legally and ethically.


The agency should be capable of handling increased email marketing volume as your business grows without compromising on quality or delivery speed.

Client Testimonials and Case Studies

Look for authentic testimonials from satisfied clients and real examples of their work to assess the agency’s performance and credibility.

Case studies can also provide insight into their problem-solving abilities and strategic thinking.

Service Pricing

The email agency’s pricing model should be transparent and align with your budget.

Check if they offer different packages or pricing based on services required, and ensure there are no hidden costs.

Customer Service

The agency should provide reliable customer support, promptly addressing any questions or concerns you may have.

They should be reachable through multiple communication channels like email, phone, or live chat.

Best Practices For Working Effectively With Your Agency


When working with an email marketing services agency, a proactive approach will help you make the most of this association, compared to a laid-back attitude.

These helpful tips will help you collaborate effectively with your agencies.

Prepare Your In-House Team:

First, prepare your team by explaining the goals and expectations of the collaboration. Select the team who will be the primary interaction points with the agency.

Likewise, your agency should specify its expectations from your team and outline the nature of collaboration.

Debrief, Research, And Strategize For An Informed Approach:

A reputed agency will systematically analyze the opportunities, challenges, and goals. It will then develop a strategic and tailored approach if this is your first experience with email marketing.

Where you’re already running email marketing, it will review the different processes and make detailed recommendations.

Ensure Clarity Of Deliverables:

As with typical agency associations, you must sign a contract. At the outset, ensure the contract contains measurable goals, the scope of activity, accountabilities, fixed deadlines, and other essential terms, signed and agreed upon by both parties.

Onboarding And Ongoing Interactions:

Your agency will implement an onboarding process, familiarizing you and your team with their processes and tools.

You must provide the dedicated agency manager access to your internal documsents whenever applicable. It’s advisable to provide as much support as possible for better results. Also, expect regular status update calls and coordination along the way.

Red Flags to Avoid When Hiring an Agency


Choosing, one of the largest email marketing companies can be challenging if you aren’t familiar with the industry. To ensure you don’t end up with an agency that won’t meet your needs, watch out for these red flags:

Unrealistic promises: If an agency tells you they are all-round experts and instead are more focused on the finances, it usually means the opposite – they have limited capabilities and are just there for the money. If you sense an agency is overpromising, it is most likely unrealistic.

Low engagement: If the agency seems in a hurry to end a sales call and is not very proactive in understanding your business goals and needs, it indicates they don’t care or lack the capabilities to ask relevant questions that facilitate effective email marketing. 

Unimpressive client list: Where an email advertising agency is not very selective about who they work with, it’s advisable to avoid such agencies as they probably don’t have the expertise and resources to manage your email campaigns successfully.

Poor customer service: If an agency isn’t responsive enough to answer your questions, it’s better to move on and look for someone else.


The right agency can be vital to your business’s success story in 2024 and beyond. Each agency we’ve spotlighted offers unique strengths, but all share a commitment to innovation, strategy, and results. Choose wisely and step into the power of email marketing to take your business to new heights.

About Author

Chris sent his first email campaign in 1995. He’s worked directly with Fortune 500 companies, retail giants, nonprofits, SMBs and government agencies in all facets of their email marketing and marketing automation programs. He’s also a BIG baseball fan, loves a good steak, and is mildly obsessed with zombie movies. For more information follow him on linkedin

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