The Best Email Marketing Agencies in the U.S. for 2025
Top-rated email marketing agencies
*Based on Clutch & G2 ratings, pricing, and key features.
| Agency | Best For | Proprietary Email Software | Rating |
| Flowium | Ecommerce Email | — | 5/5 (Clutch) |
| WebFX | Full-service Email Marketing | ✅ | 4.9/5 (Clutch) |
| Inbox Army, LLC | Email Campaign Management | — | 4.9/5 (Clutch) |
| SeeResponse | B2B Email | — | 4.8/5 (Clutch) |
| Klaviyo | B2C Email Automation | ✅ | 4.6/5 (G2) |
| HubSpot | Email Integrations | ✅ | 4.4/5 (G2) |
| Marigold (Campaign Monitor) | User-Friendly Campaign Builder | ✅ | 4.1/5 (G2) |
Learn why these email marketing companies made our list of the best email management service providers below:
Flowium is a full-service ecommerce email marketing agency that offers services such as email automation strategy creation and implementation, campaign calendar creation, A/B testing, advanced segmentation, and deliverability optimization. Flowium is best suited for ecommerce businesses of all sizes in industries like retail, fashion, and health, aiming to boost customer retention and drive sales through personalized, automated email marketing campaigns. We selected Flowium as a top email marketing agency due to its expertise in ecommerce email strategies, comprehensive services including automation and segmentation, and a proven track record of significantly boosting client revenue through effective campaigns.#1 Flowium
Overview
Key Services
Who It's Best For
Why We Picked Them
#2 WebFX
Harrisburg, PA
Custom: Starting at $300/month
250-999
✅
Overview
WebFX (that’s us 👋🏼) is a full-service digital marketing agency that offers comprehensive email marketing services, including campaign strategy, content creation, and performance analysis, to help clients enhance engagement and drive conversions.
Key Services
- Full-service email marketing
- Easy-to-use email builder
- Custom email integrations
- Analytics tracking via RevenueCloudFX
Who It's Best For
WebFX’s email marketing services are best suited for small to mid-sized businesses across various industries seeking to enhance customer engagement and drive conversions through personalized campaigns, professional copywriting, and data-driven strategies.
Why We Picked Them
We chose WebFX as a top email marketing company for its full-service approach that seamlessly integrates email with strategies like SEO and PPC, along with its proprietary tool, EmailMarketingFX, which enhances campaign performance through advanced automation and real-time analytics.
#3 Inbox Army, LLC
Overview
Inbox Army is a full-service email marketing agency offering comprehensive services such as campaign management, template production, strategy development, audits, and automation, catering to brands of all sizes with a focus on quality and customer support.
Key Services
- Full-service email campaign management
- Email marketing strategy
- Email marketing audits
- Email automation and integrations
Who It's Best For
Inbox Army caters to businesses across more than 25 industries, including e-commerce, healthcare, finance, and technology, providing tailored solutions for companies of all sizes seeking to enhance customer engagement and drive revenue through strategic email campaigns.
Why We Picked Them
Inbox Army stands out as a premier U.S. email marketing agency due to its comprehensive service offerings, including campaign management, template production, and automation, coupled with a proven track record of enhancing client engagement and ROI across diverse industries.
#4 SeeResponse
Overview
SeeResponse is a full-service B2B digital agency specializing in email marketing services such as campaign creation, automation, and lead generation, aimed at enhancing client engagement and driving business growth.
Key Services
- Email strategy development
- Email lead generation
- Marketing automation
Who It's Best For
SeeResponse is ideally suited for B2B companies, particularly SaaS startups and enterprises, aiming to enhance lead generation and drive business growth through strategic email marketing campaigns.
Why We Picked Them
We selected SeeResponse as a top email marketing agency for its comprehensive B2B services, including campaign creation, automation, and lead generation, which have consistently enhanced client engagement and driven business growth.
#5 Klaviyo
Overview
Klaviyo is a marketing automation platform designed for B2C e-commerce businesses, offering robust email marketing capabilities that enable personalized customer engagement and data-driven campaign strategies.
Key Services
- B2C CRM
- Email marketing automation
Who It's Best For
Klaviyo is best suited for small to mid-sized B2C e-commerce businesses across industries like retail, apparel, and consumer goods, aiming to enhance customer engagement and drive sales through personalized and automated email marketing campaigns.
Why We Picked Them
We chose Klaviyo as a top email marketing company for its powerful automation, deep ecommerce integrations, and advanced segmentation features, which allow brands to deliver highly personalized, data-driven email campaigns that drive customer retention and revenue.
#6 HubSpot
Cambridge, MA
Starting at $20/month for 1 core seat (free trial available)
5,000-10,000
✅
Overview
HubSpot is a comprehensive marketing platform that includes robust email functionality, allowing users to build and personalize emails, manage deliverability, send outbound messages, and automate email responses.
Key Services
- Drag-and-Drop Email Editor
- Personalization and Segmentation
- Automation and Workflows
Who It's Best For
HubSpot Marketing Hub is best for businesses of all sizes across industries like marketing, SaaS, healthcare, and finance, looking to streamline multi-channel campaigns and boost engagement through automation and analytics.
Why We Picked Them
We selected HubSpot Marketing Hub as a top email provider due to its user-friendly interface and robust email marketing features, including automated responses and detailed analytics, which empower businesses to create and manage effective campaigns efficiently.
#7 Marigold
Overview
Marigold (Campaign Monitor) is an email marketing platform that enables users to design, send, and track personalized email and SMS campaigns with ease, featuring intuitive workflows, AI-powered content assistance, and robust analytics to maximize engagement and optimize performance.
Key Services
- Email software and services
- Relationship marketing
- Real-time personalization
Who It's Best For
Campaign Monitor by Marigold is ideal for small to mid-sized businesses across various industries, seeking an easy-to-use platform with features like customizable templates, list management, and analytics to enhance their email marketing campaigns.
Why We Picked Them
We selected Campaign Monitor by Marigold as a top email provider due to its user-friendly interface, extensive template customization options, and robust analytics, which collectively empower businesses to create visually appealing emails and optimize campaign performance effectively.
FAQs: Choosing the best email marketing partner
What is the best email marketing company?
We hate to be the bearer of bad news, but there is no universal “best” email marketing company. Sure, there are plenty of top-rated agencies offering stellar email marketing services (like the ones on this list), but identifying the “best” one all depends on you.
Every business is different — they have different goals, needs, audiences, capabilities, etc. Similarly, the top email marketing companies all have different specialties, areas of focus, industry experience, and technology. Some of these may align with your business’s email marketing needs, others may not.
In other words, the best email marketing company is one that perfectly complements your brand’s goals and is best equipped to help you achieve them.
How do I choose the best email marketing company for my business?
Choosing the best email marketing company for your business starts with looking at your goals and objectives. What do you hope to get out of this partnership? What kind of agency are you looking for?
When choosing an email marketing company to partner with, keep these tips in mind to help you narrow down your options:
- Find agency portfolios detailing past work
- Evaluate their pricing page
- Research reviews and case studies from past clients
- See what email marketing technology and tools they use
- Ask questions
- Research whether they offer other digital marketing services besides email
- Check out their team and company
Is email marketing still worth it?
Yes, email marketing is still a highly effective strategy used by businesses across all industries because of its positive ROI. Over 50% of marketing professionals have noted a 100% improvement rate in their email marketing campaigns’ ROI more than two times.
If those numbers are any indicator, email marketing is a still a viable digital marketing channel that shouldn’t be overlooked.
Is email marketing dead?
No, email marketing is not dead or dying any time soon. Despite the rise of new marketing channels, email marketing remains a highly effective strategy.
Email marketing has an average ROI of 36:1, meaning companies earn $36 for every $1 invested in email. This makes email a top marketing channel in terms of ROI.
In fact, 87% of marketers actually plan to maintain or increase email spend in the future.
What should I look for in an email marketing agency?
Look for experience with your industry, a proven track record of results, services that align with your goals (like automation or segmentation), and access to tools or platforms that enhance performance.
How do I know if an agency can deliver ROI from email marketing?
Ask for case studies or client testimonials, and ensure they offer clear reporting, A/B testing, and performance tracking to measure success against your KPIs.
Should I choose a full-service agency or a specialized email marketing agency?
It depends on your needs — full-service agencies are great if you want integrated strategies (like SEO, PPC, and email), while niche email agencies may offer deeper expertise in campaign execution and automation.
End your search for the top email marketing companies with WebFX
Still searching for the best email marketing companies for 2025? End your search with WebFX.
Implement an email campaign that drives conversions and a high ROI with the help of email experts with over 28 years of experience.
With a client retention rate of nearly 100% and over 1,100 glowing testimonials, we’re confident we can help you implement an email marketing strategy that grows your business.
Contact us online to call us at 888-601-5359 to launch your personalized email marketing campaign!
