This list compares top email marketing agencies to hire in 2025, with each agency’s location, email services, industries and portfolio, for brands that want outside help with email strategy, automation and campaign management.
Email marketing is still one of the best ways for businesses to connect directly with their audience. But in today’s packed inboxes, getting your customers’ attention takes more than a catchy subject line—it takes smart strategy, creativity, and knowing your audience inside and out.
With 2025 around the corner, competition is only getting tougher, and the right email marketing agency can give you the edge you need. That’s why we’ve pulled together a list of the top marketing agencies in 2025 ready to lift your campaigns to new heights.
Each of these agencies brings something special, whether it’s automation know-how or standout design skills. Let’s explore and find the perfect fit for your business.
Email Marketing Agencies At A Glance
1. Agency
Location
Email services
1. InboxArmy
Texas, USA
Email acquisition, QA and testing, reporting and analytics, ESP migration
Based in Texas, InboxArmy offers a wide range of email marketing services suited to various industries. Trusted by more than 5,000 brands since 2016, the agency provides customized solutions based on clients’ specific needs. With a team of over 50 experts, they handle everything from strategy development to hands-on execution.
Services and expertise: email marketing acquisition, QA and testing, reporting and analytics, ESP platform migration.
As a digital marketing innovator, Mavlers delivers end-to-end MarTech solutions that transform how brands and agencies approach their marketing challenges.
Mavlers has built its reputation on executing 90,000+ projects and delivering service to 600+ agencies combined with 100+ Fortune 500 brands supported by a team of more than 800 expert professionals.
Their certified partnerships with industry leaders like Microsoft, Google, WordPress VIP, Braze, Mailchimp Pro, and Adobe Solutions underscore their technical expertise. Mavlers recently expanded their service portfolio with Email Mavlers—a specialized division dedicated to email template development for designing and coding stunning, responsive email templates across all ESPs.
Services and expertise:Email marketing services, web development, SEO services, paid media, PPC, SMM services, white label services, asset production, and link building.
Stan Ventures is often used as extra hands for email production when an agency’s calendar gets tight. Their white-label service covers copy, design, build, automations, and reporting, with a brief-to-approval workflow that fits client-facing teams. They describe their team as 250 experts and position the offer as repeatable delivery for agencies rather than one-off consulting.
Flowium, headquartered in New York, focuses on email marketing solutions specifically for e-commerce businesses. With nearly 70 specialists on board, Flowium provides everything from account setup and custom template design to automation strategies. Flowium’s data-centered approach is tailored to increase customer engagement and revenue.
Services and expertise: email software account setup and management, custom email design, campaign calendar creation, A/B testing, segmentation, email deliverability, and weekly consultations
Industries: eCommerce, Health and Wellness, Fashion, Consumer Goods
SmartMail, a boutique email marketing agency in New York, specializes in targeted campaigns and responsive email templates to boost ROI for clients. By emphasizing subscriber growth and workflow sequences, SmartMail helps clients deliver impactful email strategies that engage and convert.
Services and expertise: email campaigns, subscriber list growth, workflow sequences, responsive email templates
KlientBoost is another top email marketing company in 2025 that combines email marketing with SEO and paid advertising to create cohesive, results-oriented marketing strategies. Based in California, their team offers everything from email campaigns to paid ads on platforms like Google and LinkedIn, making it easy for clients to turn leads into loyal customers.
Services and expertise: email marketing, SEO, paid advertising, conversion rate optimization
Thooja, located in Dublin, is known for its personalized email marketing services. Their team of the best email marketers in 2025 supports clients with account setup, campaign management, and automated email flows, ensuring that each campaign resonates with the client’s brand values and objectives.
Rejoiner’s hands-on approach has made it a top choice for B2C brands looking to expand their reach. This Rhode Island-based agency focuses on email list building, deliverability management, and campaign creation, aiming to increase engagement and conversions.
Services and expertise: email list building, campaign management, copywriting, email design, deliverability optimization
MH Digital, a boutique agency in Denver, crafts email strategies tailored for small businesses. Specializing in lifecycle marketing and automation, MH Digital designs campaigns that align with client’s unique goals, helping them connect meaningfully with their audience.
Services and expertise: email campaigns, automation, lifecycle marketing, newsletters
Industries: Furniture, Health and Wellness, Technology, Apparel
Mattered, located in California, takes a data-driven and performance-focused approach to email marketing. Their expertise lies in segmentation and real-time optimization, helping clients maximize the impact of each message. With a focus on continuous improvement, Mattered guarantees campaigns stay effective by using advanced analytics to keep strategies fresh and engaging.
Services and expertise: campaign creation, flow optimization, list segmentation, performance monitoring, real-time optimization, and advanced analytics
The Bre Creative, a boutique agency rooted in Texas, combines email marketing, branding, and website design, catering to small businesses seeking a cohesive brand presence. Known for their customizable packages, they offer branding, email and text marketing, and website design, ensuring consistency across digital channels.
Services and expertise: email and text marketing, custom branding, Shopify, and custom website design
Industries: Event Planning, eCommerce, Arts & Crafts, Retail
Location: Texas, USA
Portfolio: Glo Party + Co., Oh My Darling Party Co., Stellar Creations
What An Email Marketing Agency Does
An email marketing agency plans, builds and runs the emails a business sends to its subscribers and customers. Typical work includes setting up or migrating an email service provider (ESP), designing branded templates, writing copy, segmenting lists and building automated flows such as welcome series, abandoned cart reminders and win-back campaigns.
Good agencies also protect deliverability, test subject lines and content, and report on opens, clicks, conversions and revenue per email. Some, like the specialists on this list, focus only on email and lifecycle marketing, while others bundle email with SEO, paid media or web design. For a wider shortlist, see our list of top email marketing agencies and services.
How Email Marketing Agencies Charge
Most email marketing agencies use one of three pricing models:
Monthly retainer: a fixed fee for ongoing campaign management, flows, design and reporting. This is the most common model for brands that send email every week.
Project fee: a one-time price for a defined job, such as an ESP migration, a template system or a set of automated flows.
Performance-based or hybrid: a lower base fee plus a share of email-attributed revenue, used mainly with ecommerce brands.
The main cost drivers are list size, the number of campaigns and flows per month, how much custom design and copywriting is needed, the ESP in use, and whether SMS is included. Our guide on how to calculate email marketing cost walks through these factors, and if you are still choosing software, compare the top email and SMS marketing platforms for ecommerce.
Frequently Asked Questions
What does an email marketing agency do?
An email marketing agency handles strategy, design, copywriting, list segmentation, automation and reporting for a brand’s email program. Many also manage ESP setup or migration and deliverability. The goal is to turn a subscriber list into steady, measurable revenue.
How much does an email marketing agency charge?
Pricing depends on the model and the scope. Agencies usually charge a monthly retainer for ongoing management, a project fee for one-off builds such as migrations or flows, or a hybrid fee tied to email revenue. List size, send volume, design needs and SMS add-ons have the biggest effect on cost.
Should you hire an email marketing agency or do it in house?
An agency makes sense when you need specialist skills quickly, such as automation, deliverability or ESP migration, or when your team lacks time to send consistently. Keeping email in house works when you already have a skilled marketer and a simple program. Many brands start with an agency to build the system, then run day-to-day sends themselves.
Finding the right email marketing agency in 2025 can feel like a big step, but it’s one that can make a real difference in how your brand connects with people. Each agency on this list brings something special, and they’re ready to help you.
So, take a closer look, explore what each team has to offer, and find the one that feels right for your goals. A strong partnership can transform your email marketing, turning it into a channel that keeps your audience engaged, your brand memorable, and your results growing.
If you want to feature your email marketing agency on this list, email us or submit a form in the Top Choices section. After a thorough assessment, we’ll decide whether it’s a valuable addition.
