Top 10 Email Marketing Agencies in the US [2025]

Email marketing remains one of the most effective ways to engage customers.

This article highlights the top email marketing agencies in the US that deliver exceptional results.

Whether you want to boost open rates, increase conversions, or create compelling email content, you will find the right agency in this list.

Here are the details you’ll find:

• Specialized Skills: Learn about the unique skills and strategies these agencies use, like personalized email campaigns and advanced segmentation.
• Success Stories: See case studies that show how these agencies have improved client engagement and conversion rates.
• Performance Metrics: Check out key performance indicators and results from the case studies, highlighting the benefits these agencies provide.

Before we explore the detailed features of each agency, let’s take a look at the leading email marketing agencies in the US and some of their top clients:

Email Marketing Agencies in the US

Discovering Top Email Marketing Agencies in the US

Flowium

Flowium is an email marketing agency that tailors solutions to fit your brand’s needs. As an Elite Klaviyo Partner, they focus on innovation and results.

Their international team is dedicated to enhancing client success through effective email campaigns.

Expertise

• Klaviyo Accounts: They expertly set up and manage Klaviyo accounts to maximize the effectiveness of email marketing.
• ESP Account Setup & Management: Flowium efficiently handle Email Service Provider (ESP) accounts to streamline operations.
• Monthly Reporting: They provide detailed monthly reports to track progress and optimize strategies.
• Email Automation: Enhancing customer engagement and conversion rates, they develop and execute automation strategies.
• Calendar Creation & Implementation: They create and implement strategic email campaign calendars for consistent and timely communication.
• Weekly Calls With Your Specialist: Regular consultations, including weekly calls, are offered to ensure alignment with your business goals and address any concerns.

Case Studies

Wine Awesomeness: Flowium boosted Wine Awesomeness’ email marketing performance.

Within just three months, the agency increased email revenue attributed to marketing efforts to 65.7%, achieved a 271% increase in flow-attributed revenue, and saw a 21% rise in open rates.

Retention.com: Addressing the challenge of acquiring new customers in eCommerce, Flowium delivered remarkable results for Retention.com.

Over an eight-month period, they achieved a 376% ROI, added over 63,000 new subscribers with a lead acquisition cost of just $0.20 per subscriber, and attributed over $67,000 in total revenue to their efforts.

Lounge Lizard

Lounge Lizard, founded in 1998, is a renowned web design and digital marketing agency. They specialize in branding, web design, and digital marketing, operating from eight locations across the USA.

Expertise

• Custom Email Campaigns: They create tailored email campaigns that resonate with target audiences, driving engagement and conversions.
• AMP Email Marketing: They use Accelerated Mobile Pages (AMP) technology for dynamic and interactive email content, enhancing user experience.
• Lead Nurturing: Lounge Lizard develop strategies to cultivate leads through personalized communication, fostering long-term relationships.
• Cost-Effective Solutions: They offer affordable marketing strategies that maximize ROI while maintaining high-quality results.
• Spam Testing: They ensure email deliverability by testing against spam filters to avoid being marked as junk mail.
• CRM Integration: Lounge Lizard integrate Customer Relationship Management (CRM) systems for streamlined data management and targeted marketing efforts.

Case Studies

LOOP-LOC: Lounge Lizard partnered with LOOP-LOC, a luxury pool liner and safety cover manufacturer, to transition their digital strategy.

The collaboration resulted in a 37% increase in users, a 290% rise in paid users, and a 160% improvement in conversion rates.

Voss Events: The marketing experts at Lounge Lizard helped Voss Events, known for organizing RuPaul’s Drag Race shows, to sell out their events through influencer marketing, PPC campaigns, and email signups.

This led to collecting 120,000 emails via website signups, a 6.6% increase in conversion rates, and 90% of shows selling out on Ticketmaster.

Uplers

Uplers is an email marketing agency that has supported over 5,000 customers in 52 countries with email design and coding needs.

They offer comprehensive email marketing services using platforms like Mailchimp, Campaign Monitor, and Salesforce.

Expertise

• Email Campaign Management: They oversee the entire lifecycle of email campaigns, from strategy and creation to execution and analysis, ensuring impactful audience engagement.
• Email Program Audit: Uplers perform detailed audits of email marketing programs to pinpoint strengths and areas for enhancement, optimizing performance.
• Data Integration & Migration: They manage seamless integration and migration of data, ensuring accuracy and efficiency during transitions.
• Email Automation: They design automated email sequences that save time and increase efficiency, delivering personalized content to subscribers.
• Customized Digital Assets: They create tailored digital assets, such as landing pages and banners, to enhance the effectiveness of email campaigns.

Case Studies

Universal Relocations: Uplers executed three email marketing campaigns for Universal Relocations, targeting Diwali, Black Friday, and Halloween, with a focus on shipping to India. The campaigns achieved an average open rate of 18.89% in the USA, which aligns with the global average of 18%.

CuraLife: CuraLife, a global wellbeing company, partnered with Uplers for their email marketing efforts. As a result, they saw a 50% increase in conversion rates on their landing pages.

Moburst

Moburst has evolved from its mobile-first roots to become one of the most sought-after full-service digital agencies worldwide.

Among the notable email marketing agencies in the US, they offer comprehensive digital marketing and app marketing services, operating from four branches.

Expertise

• End-to-End Email Marketing: They manage all aspects of email marketing campaigns, from conception to execution and analysis.
• Advanced Automation: They implement sophisticated email automation strategies to streamline communication and enhance customer engagement.
• Email Newsletter Service: Moburst designs and distribute engaging email newsletters to keep audiences informed and engaged.
• Data Integration & Migration: Their team ensures seamless data integration and migration for accurate and efficient email marketing operations.

Case Studies

Redefine Meat: Moburst partnered with Redefine Meat to launch in four European cities using social media and email marketing.

They built a subscriber waiting list of over 50,000 customers. On Facebook, they achieved 82.5 million impressions and 1.5 million engagements, both increasing by over 15,000%.

Mailwise: Moburst worked with Mailwise, a free email client app, to acquire loyal users in the competitive email and productivity app categories.

This collaboration led to over 500K downloads, a 4.5 rating, and a 70% decrease in Cost Per Install (CPI).

Lyfe

Lyfe Marketing Agency is a full-service social media management company that drives traffic and sales through its social media management services.

They specialize in B2B, e-commerce, finance, healthcare, and wellness industries.

Expertise

• Email Blasts: They create and distribute targeted email blasts to maximize reach and engagement.
• Email Design & Copy: Lyfe team designs visually appealing emails and craft compelling copy to captivate and convert recipients.
• List Maintenance: They manage and maintain email lists to ensure accuracy and effectiveness.
• Monthly Reporting: Lyfe Marketing provides detailed monthly reports to track the performance and impact of email marketing campaigns.

Case Studies

CedarCraft: CedarCraft, a company offering products for limited space gardening, worked with Lyfe Marketing to boost online presence and sales.

The email marketing strategy resulted in 1974 emails sent, $12,715.81 in revenue, 63 orders, and an average order value of $215.65.

Fuel Made

Fuel Made is a Klaviyo Master Elite Partners who specialize in improving conversion rates, average order values, and lifetime values for e-commerce brands.

They have extensive experience working with top digital brands and are focused on continuous learning and growth.

Expertise

• Cart Recovery Rate: They optimize strategies to recover abandoned carts and convert potential sales.
• Lead Generation: Their expert team implements effective tactics to generate and capture leads.
• Scheduled Campaigns: They plan and execute email campaigns on a set schedule to maintain consistent engagement.
• Custom Automations: Fuel Made designs custom automated email workflows to streamline marketing efforts.
• Segmentation & Analysis: They segment audiences and analyze data to tailor marketing strategies for maximum impact.

Case Studies

Satechi: Satechi aimed to capture more new visitors’ emails to encourage direct purchases instead of through Amazon. Fuel Made created a unique brand experience to engage shoppers, resulting in 1.3x more visitors, a 3x capture rate, and 1.3x conversions via welcome emails.

BK Beauty: Fuel Made developed a welcome email and discount follow-up email strategy for BK Beauty, increasing visibility. The results included a 118% increase in placed order rate for the first welcome email, a 15% open rate increase, and a 13% conversion rate increase for the entire welcome flow.

Rejoiner

With over 10 years in the digital marketing business, focusing on email marketing, and a team with a collective 40+ years of experience, Rejoiner helps unlock the full revenue potential of your email channel.

Expertise

• Abandoned Cart: They recover lost sales by targeting customers who abandon their carts.
• Abandoned Browse: Rejoiner re-engages visitors who browse but do not make a purchase.
• New Subscriber: They welcome and nurture new subscribers to build engagement from the start.
• Price Drop: They notify customers about price drops to encourage purchases.
• Win Back: Their team creates campaigns to re-engage inactive customers.

Case Studies

Triumph: Since partnering with Rejoiner, email has become Triumph’s top source of last-click revenue, increasing by 33%. Rejoiner has expanded Triumph’s email strategy to five additional international markets, making email the #1 or #2 revenue driver for each, achieving a 30X ROI.

Mother Dirt: In 2017, Mother Dirt sought growth in retention and revenue and partnered with Rejoiner. Since then, Mother Dirt’s email revenue has grown by 36%, thanks to Rejoiner’s team of email experts.

Bavsound: Bavsound aimed to improve customer communication and maximize customer value over a full lifecycle. Since 2014, Rejoiner has increased Bavsound’s email-attributed revenue by 130%.

Inbox Army

Inbox Army is a full-service email marketing agency catering to global brands, agencies, and businesses of all sizes.

As one of the top email marketing agencies in the US, they handle all marketing needs from strategy to development and execution, offering cost-effective solutions to build and manage email marketing programs.

Expertise

• Email Deliverability: Inbox Army ensures emails reach the inbox and avoid spam filters.
• ESP Vendor Evaluation and Migration: Their expert team selects and transitions to the best Email Service Providers.
• Email Template Design and Coding: They design and code visually appealing and functional email templates.
• Email Automation: Inbox Army creates automated email workflows to enhance efficiency and engagement.

Case Studies

Sixthreezero: After multiple mistakes by their previous agency, Sixthreezero chose to work with Inbox Army.

The results included a 50% increase in revenue, a 77.15% increase in open rate and a 335% increase in revenue compared to the same period the previous year.

Sit ‘n Sleep: Inbox Army was hired to design, code, and optimize Sit ‘n Sleep’s email campaigns and automations.

By employing strategic email marketing best practices, Inbox Army increased the holiday email campaign revenue by 60%.

Stryde

Stryde is an ecommerce growth agency dedicated to working with baby clothing, fashion, home goods, and sporting goods D2C brands.

Headquartered in Utah, this boutique firm has a global workforce that partners with carefully vetted 6 and 7-figure brands to scale their revenue through a comprehensive ecommerce marketing framework.

Expertise

• Email Marketing Campaigns: Stryde creates and manages email campaigns to drive engagement and sales.
• SMS Marketing: Their team implements SMS marketing strategies to enhance customer communication.
• SEO Optimization: They optimize websites to improve organic search rankings and drive traffic.
• Paid Search/SEM: They manage paid search campaigns to increase visibility and conversions.

Case Studies

Rustico: Rustico faced challenges with email marketing, struggling to generate subscribers and revenue. Stryde implemented strategies such as setting up popups, conducting A/B tests, and segmenting the email list to improve conversions and relevance.

This resulted in a 131% increase in total traffic year over year and a 67% increase in total revenue.

Axon Optics: Axon approached Stryde to boost organic search traffic and revenue after losing visibility for crucial keywords.

Stryde developed targeted email campaigns and fixed Axon’s site architecture. As a result, Axon experienced a 78% increase in total traffic year over year and a 29% increase in total revenue.

No Good

No Good has a team of growth leads, creators, and data scientists to enhance your email marketing. Their approach includes performance analytics and continuous optimization to boost engagement and ROI.

The company is committed to helping with lifecycle marketing, advanced segmentation, and automation, making their strategies stand out.

Expertise

• Email Marketing Integrations: They integrate email marketing tools to streamline campaign execution, ensuring all systems work together seamlessly for optimal performance.
• Email Flow Optimizations: They optimize email flows to enhance the customer journey, improving efficiency and boosting conversion rates through strategic adjustments.
• Customer Engagement Programs: No Good enhances customer engagement through platforms like Mailchimp, HubSpot, Klaviyo, Braze, Pardot, and SendGrid, creating tailored strategies that boost interaction and retention.
• Email Strategy and Audit: No Good develops detailed email strategies and conducts audits to optimize email performance, ensuring campaigns are effective and aligned with business goals.
• Email Newsletters: No Good crafts and manages engaging email newsletters, keeping audiences informed and connected with personalized content and updates.

Case Studies

Intuit: Intuit partnered with NoGood to boost total sign-ups by 25% using a retention-first acquisition strategy based on deep user insights.

This approach boosted industry benchmarks by converting more users to paid subscribers, with 97% of sign-ups coming from paid media.

JVN Hair: Partnering with NoGood for a major product launch, JVN Hair saw a 298% revenue increase and a 140% ROAS boost in Q1 2022 compared to Q4 2021.

Email Marketing Agencies in the US: Frequently Asked Questions

1. What services do the best email marketing agencies in the US offer?

Email marketing agencies in the US offer services including email design, copywriting, campaign management, automation, analytics, and eCommerce email marketing. Many also provide SEO, PPC, and social media marketing to enhance their email strategies.

2. What kind of ROI can I expect from working with a top email marketing agency in the US?

The ROI from email marketing can be substantial, with many businesses seeing significant increases in open rates, click-through rates, and overall revenue. Specific results vary based on industry and strategy.

3. Is email marketing still effective for boosting digital visibility?

Yes! Email marketing remains highly effective for boosting digital visibility. It enables businesses to reach their target audience with personalized content, driving engagement and conversions. With the right strategies, email marketing can build strong customer relationships, increase website traffic, and boost sales.

4. What should I look for in an email marketing agency’s case study?

A good case study should highlight successful email campaigns, showcasing the agency’s skill in creating engaging content, effective design, and high deliverability rates.

5. How do I choose the best email marketing agency for my business in the US?

When selecting the best email marketing agency in the US, consider their experience, case studies, client reviews, and specific services offered. Ensure they have a proven track record in your industry that aligns with your business goals.

6. What is the cost of hiring an email marketing agency in the US?

The cost can vary widely depending on the scope of services, the agency’s expertise, and the size of your business. Some agencies charge a monthly retainer, while others might offer package deals or charge per campaign.

7. What industries benefit the most from email marketing services provided by US agencies?

Industries such as eCommerce, retail, technology, health and fitness, finance, and B2B benefit greatly from email marketing services. These sectors can use personalized email campaigns to engage customers, drive sales, and build brand loyalty.

8. Can the email marketing agencies in the US integrate their services with my existing CRM system?

Yes, most email marketing agencies offer integration services with CRM systems like Salesforce, HubSpot, and Zoho. This integration allows for seamless data synchronization, better targeting, and more personalized email campaigns.

9. How do email marketing agencies in the US ensure compliance with data protection laws?

Email marketing agencies in the US ensure compliance by obtaining explicit consent from subscribers, providing clear opt-out options, keeping detailed consent records, and securing personal data. They also keep clients updated on regulatory changes.

10. How do I measure the success of my email marketing campaigns with an agency in the US?

Success can be measured by tracking key metrics such as open rates, click-through rates, conversion rates, and overall ROI. Regular reporting and analysis provided by the agency will help you understand the effectiveness of your campaigns.

Conclusion

Choosing the right email marketing agency is vital for engaging customers and boosting sales. The top email marketing agencies in the US listed here have proven expertise across B2B, e-commerce, finance, healthcare, and wellness industries.

With their specialized skills and impressive performance metrics, these agencies can help you capture more leads, improve customer communication, and optimize your email campaigns.

Ready to elevate your email marketing? Partner with one of these leading agencies today.

Bonus Content: If you’re interested, here are some other resources that might be useful for you:

• US Ecommerce Statistics For 2025 (Forecasts & Trends)
• Top 20 Shopify Stores in the USA (+Ecommerce Market)
• Top 7 Parcel Courier Services in the US for Ecommerce Businesses
• Top SEO Agencies in the US for Growth | 2025
• Best Fulfillment Companies in the US