Email marketing companies focus on helping businesses communicate effectively with their audiences through tailored email campaigns. These firms provide platforms and tools necessary for crafting, sending, and analyzing marketing emails. In today’s digital age, personalization and automation are becoming crucial elements, driving growth in the sector. The industry is increasingly integrating artificial intelligence to create smarter email experiences, while also adapting to new privacy regulations to ensure compliance. As customer expectations rise, firms are innovating relentlessly, exploring omnichannel strategies, and advancing customer engagement to stay relevant in a competitive marketplace.

This list presents 23 notable email marketing companies based in the US. The companies vary in size, ranging from small startups to larger established firms, and span diverse locations, including cities like Chicago, Waltham, and San Francisco. Founded from 1994 to 2020, these businesses specialize in services such as email automation, customer relationship management, and eCommerce-focused solutions. Their distinct offerings cater to various industries, targeting both small, thriving entrepreneurs and larger enterprises seeking to optimize their marketing strategies.

Continue reading to discover the top email marketing companies in the US.

Top 23 Email Marketing Companies in the US

1. Constant Contact

• Website: constantcontact.com
• Ownership type: Private Equity
• Headquarters: Waltham, Massachusetts, United States (USA)
• Employee distribution: United States (USA) 86%, Canada 4%, India 4%, Other 6%
• Latest funding: $400.0M, February 2021
• Founded year: 1998
• Headcount: 1001-5000
• LinkedIn: constant-contact

Constant Contact, Inc. is a marketing agency based in Waltham, Massachusetts, that offers a range of online marketing solutions, with a strong emphasis on email marketing and contact management services. Founded in 1998, the company has built a reputation for helping small businesses, nonprofits, and freelancers effectively engage with their audiences. Their platform provides tools for creating and managing email campaigns, as well as resources for list growth and customer engagement. Constant Contact has also expanded its offerings to include SMS marketing, reflecting a commitment to evolving with industry trends. The company has received significant funding, with a notable investment of $400 million in February 2021, which underscores its potential for continued development and innovation in the marketing sector.

2. Campaign Monitor

• Website: campaignmonitor.com
• Ownership type: Venture Capital
• Headquarters: Nashville, Tennessee, United States (USA)
• Latest funding: Series A, $250.0M, April 2014
• Founded year: 2004
• Headcount: 51-200
• LinkedIn: campaign-monitor

Campaign Monitor is an email marketing platform based in Nashville, Tennessee, founded in 2004. The company specializes in providing businesses with tools to create, send, and analyze email campaigns. Its offerings include an intuitive email template builder, segmentation capabilities, marketing automation features, and robust analytics. Campaign Monitor caters to a wide range of industries, including retail and nonprofit sectors, and operates on a subscription model, allowing users to access its services online. The company has received substantial funding, totaling $250 million in its last funding round in 2014, which underscores its relevance and potential in the email marketing industry. Campaign Monitor is recognized for its user-friendly interface and strong customer support, making it a preferred choice for businesses looking to enhance their email marketing efforts.

3. ActiveCampaign

• Website: activecampaign.com
• Ownership type: Private Equity
• Headquarters: Chicago, Illinois, United States (USA)
• Employee distribution: United States (USA) 61%, Ireland 14%, Costa Rica 9%, Other 16%
• Latest funding: Series C, $240.0M, April 2021
• Founded year: 2003
• Headcount: 1001-5000
• LinkedIn: activecampaign-inc-

ActiveCampaign, founded in 2003 and headquartered in Chicago, Illinois, is a private equity-backed SaaS company that specializes in marketing automation, email marketing, and customer relationship management (CRM) solutions. The company primarily serves small to mid-sized businesses across various sectors, providing tools that help streamline marketing efforts and enhance customer engagement. ActiveCampaign's platform includes features such as dynamic content, audience segmentation, and integrated AI, which allow businesses to create personalized marketing experiences. The company has garnered significant attention in the industry, boasting over 180,000 customers globally. In April 2021, ActiveCampaign raised $240 million in a Series C funding round, further solidifying its position in the market and enabling continued innovation in its product offerings.

4. Drip

• Website: drip.com
• Ownership type: Corporate
• Headquarters: Minneapolis, Minnesota, United States (USA)
• Employee distribution: United States (USA) 62%, Denmark 33%, Estonia 4%
• Latest funding: July 2016
• Founded year: 2012
• Headcount: 51-200
• LinkedIn: dripecrm

Drip, founded in 2012 and based in Minneapolis, Minnesota, is a marketing automation provider that focuses on email marketing solutions specifically designed for e-commerce businesses. With a workforce of around 161 employees, Drip has carved out a niche in the marketing technology sector. The company offers a suite of tools that facilitate dynamic segmentation, automation of marketing tasks, and insights into customer behavior. Their platform is particularly beneficial for brands aiming to improve customer engagement and increase sales through targeted email campaigns. Drip has established integrations with popular e-commerce platforms like Shopify and WooCommerce, enhancing its utility for online retailers. The company has garnered a reputation for its customer service, boasting a high satisfaction score, which reflects its commitment to supporting clients in their marketing efforts.

5. MailerLite

• Website: mailerlite.com
• Ownership type: Corporate
• Headquarters: San Francisco, California, United States (USA)
• Employee distribution: United States (USA) 37%, Lithuania 19%, Turkey 6%, Other 38%
• Latest funding: $90.0M, April 2022
• Founded year: 2010
• Headcount: 51-200
• LinkedIn: mailerlite-international

MailerLite is a digital marketing platform based in San Francisco, California, that specializes in email marketing, website building, and lead generation. Founded in 2010, the company has grown to employ around 142 people across various locations, including the United States, Lithuania, Turkey, Greece, and Argentina. MailerLite provides a user-friendly interface that allows businesses and individuals to create engaging email campaigns and websites with ease. Their offerings include automation features, landing page creation, and tools for collecting leads, which are essential for enhancing online marketing efforts. The company has received substantial funding, with a notable investment of $90 million in April 2022, reflecting its growth trajectory and relevance in the digital marketing industry. MailerLite's commitment to customer support and education, through resources like their Academy and live learning sessions, further solidifies their position as a valuable resource for marketers.

6. iContact

• Website: icontact.com
• Ownership type: Corporate
• Headquarters: Morrisville, North Carolina, United States (USA)
• Employee distribution: United States (USA) 68%, South Africa 17%, Canada 4%, Other 12%
• Latest funding: January 2019
• Founded year: 2003
• Headcount: 51-200
• LinkedIn: icontact

iContact, headquartered in Morrisville, North Carolina, is an email marketing service provider that has been operational since 2003. The company specializes in offering a suite of tools designed to assist small and medium-sized businesses in managing their email campaigns effectively. iContact provides features such as automation, analytics, and customizable templates, which enable users to create engaging email content and analyze campaign performance. The platform is designed to be user-friendly, allowing businesses to easily segment their audience and personalize communications. Over the years, iContact has supported thousands of businesses in sending billions of emails, showcasing its significant role in the email marketing industry. The company has also received various accolades for its customer service and product usability, further solidifying its position in the market.

7. SendGrid

• Website: sendgrid.com
• Ownership type: Corporate
• Headquarters: Denver, Colorado, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: $3.0B, October 2018
• Founded year: 2009
• Headcount: 201-500
• LinkedIn: sendgrid

SendGrid, now part of Twilio, is an email service provider based in Denver, Colorado, founded in 2009. The company offers a robust platform designed for email delivery and marketing solutions, serving a wide range of businesses from startups to large enterprises. Their services include an Email API for reliable email delivery and a suite of tools for creating engaging email marketing campaigns. SendGrid emphasizes high deliverability rates, ensuring that emails reach their intended recipients effectively. The company has processed over 148 billion emails monthly, showcasing its capacity to handle high volumes. With a focus on optimizing email performance, SendGrid also provides expert consulting services. The company has received significant funding, amounting to $300 million, which underscores its growth and relevance in the email marketing industry.

8. Litmus

• Website: litmus.com
• Ownership type: Corporate
• Headquarters: Cambridge, Massachusetts, United States (USA)
• Employee distribution: United States (USA) 88%, Canada 6%, Other 6%
• Latest funding: April 2025
• Founded year: 2005
• Headcount: 51-200
• LinkedIn: litmus-com

Litmus, founded in 2005 and based in Cambridge, Massachusetts, is a technology company that specializes in email marketing solutions. The firm offers a robust suite of tools designed for email testing, analytics, and personalization. These tools empower marketing teams to optimize their email campaigns effectively. Litmus serves a variety of businesses within the marketing and advertising sectors, providing essential resources that enhance engagement and improve the overall effectiveness of email communications. The company has established itself as a significant player in the email marketing industry, focusing on helping organizations refine their email strategies and achieve better results. With a dedicated workforce of around 210 employees, Litmus continues to innovate and adapt to the evolving needs of marketers.

9. Benchmark Email

• Website: benchmarkemail.com
• Ownership type: Private
• Headquarters: St. Louis, Missouri, United States (USA)
• Employee distribution: India 48%, United States (USA) 29%, Philippines 5%, Other 18%
• Latest funding: Other (Debt), $3.0M, January 2021
• Founded year: 2004
• Headcount: 51-200
• LinkedIn: benchmark-email

Benchmark Email, based in St. Louis, Missouri, is a private company that specializes in email marketing and marketing automation services. Established in 2004, it has been providing tools that help businesses create, automate, and optimize their email campaigns. The platform is designed to be user-friendly, allowing users to build engaging emails with features like an email builder, automation capabilities, and detailed reporting tools. Benchmark Email also offers integrations with various platforms, enhancing its utility for marketers. The company has a significant presence in the industry, with a workforce that includes a notable percentage of employees based in India. In January 2021, Benchmark Email secured $3 million in funding, which reflects its ongoing relevance and potential for growth in the competitive email marketing space.

10. AWeber

• Website: aweber.com
• Ownership type: Private
• Headquarters: Chalfont, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 84%, Andorra 4%, Serbia 4%, Other 8%
• Founded year: 1998
• Headcount: 51-200
• LinkedIn: aweber

AWeber Communications, based in Chalfont, Pennsylvania, is a private company that has been operating since 1998. It specializes in email marketing and automation services, providing a robust platform for small businesses, bloggers, and content creators to engage their audiences effectively. AWeber's offerings include tools for creating personalized email campaigns, automated marketing solutions, and landing pages. The company has built a reputation for its user-friendly interface and comprehensive customer support, which includes a 24/7 help center and a free account migration service. AWeber also integrates with numerous applications, allowing users to streamline their marketing efforts. The company has not reported any recent funding, indicating a stable operational model focused on serving its existing customer base.

11. Sendlane

• Website: sendlane.com
• Ownership type: Venture Capital
• Headquarters: San Diego, California, United States (USA)
• Employee distribution: United States (USA) 93%, Peru 7%
• Latest funding: Series C, $4.2M, June 2023
• Founded year: 2013
• Headcount: 51-200
• LinkedIn: sendlane

Sendlane, based in San Diego, California, is a marketing automation company that specializes in email and SMS marketing solutions tailored for eCommerce businesses. Established in 2013, Sendlane has developed a unified platform that allows online retailers to automate their marketing strategies, enhance customer engagement, and drive revenue through data-driven insights. The company offers a range of services designed to optimize marketing campaigns and improve customer retention. Sendlane has recently secured $4.15 million in Series C funding as of June 2023, reflecting its growth trajectory and the confidence investors have in its business model. With a workforce of around 60 employees, Sendlane emphasizes personalized customer support, boasting a 30-second average response time, which is a significant advantage in the competitive marketing automation industry. Their platform integrates various marketing tools, including email, SMS, reviews, and forms, making it a comprehensive solution for eCommerce businesses aiming to enhance their customer experience and maximize revenue.

12. NowLifeStyle

• Website: sendshark.com
• Ownership type: Private
• Headquarters: Schertz, Texas, United States (USA)
• Founded year: 1904
• Headcount: 10001+
• LinkedIn: nowlifestyle

NowLifeStyle, operating through its platform SendShark, is an email marketing service based in Schertz, Texas. Founded in 1904, the company has evolved to provide tools that assist users in building and managing email lists effectively. SendShark offers features such as autoresponders, lead page builders, and a user-friendly interface designed for individuals and businesses aiming to improve their marketing strategies through email. The service operates on a subscription model, allowing users to engage with their audience efficiently. Despite its long history, the company has not reported any funding, which may limit its growth potential and innovation in a competitive market. Nevertheless, it continues to serve a niche audience with its affordable pricing and straightforward solutions for email marketing.

13. Stripo

• Website: stripo.email
• Ownership type: Private
• Headquarters: United States (USA)
• Employee distribution: Ukraine 100%
• Founded year: 2017
• Headcount: 51-200
• LinkedIn: stripo

Stripo is a private software company based in the United States, specializing in email marketing tools. Established in 2017, Stripo offers a comprehensive email template builder that caters to both code-savvy users and those who prefer a no-code approach. The platform includes a variety of features such as an email signature generator, testing tools, and gamification elements, all aimed at helping businesses create effective email campaigns. Stripo serves a wide range of clients, from small businesses to larger marketing teams, providing them with the tools necessary to enhance their email marketing efforts. The company has gained traction in the industry, boasting over 1.2 million users who utilize its services to streamline their email production processes. Stripo's commitment to innovation and user experience positions it as a noteworthy player in the email marketing sector.

14. Net Atlantic, Inc.

• Website: netatlantic.com
• Ownership type: Private
• Headquarters: Salem, Massachusetts, United States (USA)
• Founded year: 1995
• Headcount: 11-50
• LinkedIn: net-atlantic-inc-

Net Atlantic, Inc. is an email marketing service provider based in Salem, Massachusetts, with a history dating back to 1995. The company specializes in delivering comprehensive email marketing solutions tailored to the needs of businesses and organizations across various sectors. Their offerings include AI-powered email marketing, campaign management, and deliverability monitoring, which help clients improve engagement and achieve better returns on investment. With over 85 billion emails deployed and a strong focus on customer support, Net Atlantic has built a reputation for reliability and effectiveness in email marketing. They also provide additional services such as custom email template design and integration support, further enhancing their value proposition in the industry.

15. Keap

• Website: keap.com
• Ownership type: Corporate
• Headquarters: Chandler, Arizona, United States (USA)
• Employee distribution: United States (USA) 89%, United Kingdom (UK) 5%, Other 5%
• Latest funding: $80.0M, October 2024
• Founded year: 2001
• Headcount: 201-500
• LinkedIn: keap-growing

Keap, founded in 2001 and based in Chandler, Arizona, is a software company that specializes in automation and customer relationship management (CRM) solutions tailored for small businesses. With a workforce of approximately 267 employees, Keap has built a reputation for providing tools that enhance operational efficiency and customer engagement. Their offerings include marketing automation, lead management, and sales automation, with a significant focus on email marketing capabilities. Keap has served over 200,000 small businesses, helping them streamline processes and improve revenue through effective automation. The company has recently secured $80 million in funding, indicating strong investor confidence in its growth potential and market relevance. Keap's commitment to supporting small businesses through automation and personalized communication strategies makes it a notable player in the email marketing industry.

16. TrafficWave.net

• Website: trafficwave.net
• Ownership type: Private
• Headquarters: Spring, Texas, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2000
• Headcount: 1-10
• LinkedIn: trafficwave.net

TrafficWave.net, based in Spring, Texas, is an email marketing service provider that has been operational since 2000. The company specializes in offering tools that help businesses and organizations manage their email marketing campaigns effectively. Their services include customizable email templates, subscriber list management, and integration with over 4,000 applications through platforms like Zapier. TrafficWave.net caters to a wide range of customers, including affiliate marketers, religious groups, and home-based businesses, all seeking to enhance their marketing efforts through effective communication strategies. The company emphasizes ease of use, allowing users to create and manage campaigns with minimal technical expertise. With a flat-rate pricing model, TrafficWave.net aims to provide cost-effective solutions for email marketing, making it an attractive option for small to medium-sized enterprises looking to grow their customer base and improve engagement.

17. ReSci (Retention Science)

• Website: retentionscience.com
• Ownership type: Venture Capital
• Headquarters: Santa Monica, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: Series A, $7.0M, August 2014
• Founded year: 2011
• Headcount: 51-200
• LinkedIn: retention-science

Retention Science, also known as ReSci, is a marketing automation company based in Santa Monica, California, founded in 2011. The company focuses on providing AI-driven email and SMS marketing solutions specifically designed for ecommerce businesses. By leveraging predictive analytics, ReSci helps clients enhance customer engagement and retention through personalized communications. Their platform allows businesses to optimize marketing efforts, resulting in improved sales outcomes. ReSci serves a range of clients, from startups to large enterprises, and has reported significant success in increasing email engagement rates by 60% and purchase rates by 45%. The company has received $7 million in Series A funding, which underscores its growth potential and commitment to innovation in the marketing automation space. As part of the Constant Contact family, ReSci continues to evolve its offerings, making AI technology accessible for brands looking to improve their marketing strategies.

18. CodeCrew

• Website: codecrew.us
• Ownership type: Private
• Headquarters: San Francisco, California, United States (USA)
• Employee distribution: United States (USA) 75%, South Africa 8%, Portugal 8%, Other 8%
• Founded year: 2018
• Headcount: 11-50
• LinkedIn: codecrewllc

CodeCrew, established in 2018 and located in San Francisco, California, is an email marketing agency that specializes in providing a wide range of email marketing services. With a team of approximately 37 employees, they focus on enhancing client engagement and boosting revenue through tailored email strategies, design, and automation. Their services include email marketing audits, campaign management, A/B testing, and deliverability tracking, among others. CodeCrew has worked with clients from various industries, showcasing their ability to optimize marketing efforts and achieve high returns on investment. Their commitment to innovation is evident in their platform-agnostic approach, allowing them to integrate with popular tools like Klaviyo, MailChimp, and HubSpot. CodeCrew's emphasis on design and strategy, combined with their impressive client success stories, positions them as a noteworthy player in the email marketing industry.

19. Lyris

• Website: lyris.com
• Ownership type: Corporate
• Headquarters: Emeryville, California, United States (USA)
• Employee distribution: United States (USA) 75%, United Kingdom (UK) 25%
• Latest funding: May 2015
• Founded year: 1994
• Headcount: 51-200
• LinkedIn: lyris

Lyris, founded in 1994 and based in Emeryville, California, is an email marketing service provider that specializes in tools for list management, content creation, and targeted email campaigns. The company caters to businesses and organizations aiming to enhance their email marketing strategies through effective segmentation and automation. Lyris provides a platform that enables users to create, manage, and analyze their email communications efficiently. With a workforce of approximately 136 employees, Lyris has maintained a significant presence in the email marketing sector, serving clients primarily in the United States and the United Kingdom. Their offerings include advanced features such as triggered segments and customizable templates, which help users tailor their marketing efforts to specific audience segments. While Lyris has not reported any recent funding, their long history in the industry suggests a commitment to evolving their services to meet client needs.

20. Inbox Army

• Website: inboxarmy.com
• Ownership type: Private
• Headquarters: United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2016
• Headcount: 51-200
• LinkedIn: inbox-army

Inbox Army is a private email marketing agency based in the United States, founded in 2016. With a team of 51-200 employees, the company specializes in providing comprehensive email marketing solutions tailored to the unique needs of its clients. Their services include email strategy and audits, campaign management, automation, template production, and deliverability assessments. Inbox Army has worked with over 5,000 brands across various industries, demonstrating their capability to adapt to different market demands. They support clients using more than 40 email service providers, showcasing their expertise in navigating various platforms. The agency has garnered positive feedback from clients, who appreciate their proactive communication and effective strategies that have led to significant improvements in email performance and revenue generation.

21. EmailSoldiers

• Website: emailsoldiers.com
• Ownership type: Private
• Headquarters: St. Petersburg, Florida, United States (USA)
• Employee distribution: Russia 82%, United States (USA) 18%
• Founded year: 2014
• Headcount: 51-200
• LinkedIn: emailsoldiers

EmailSoldiers, based in St. Petersburg, Florida, is a private company that specializes in email marketing and automation services. Founded in 2014, the firm has grown to a team of around 22 employees, with a significant portion of its workforce located in Russia. The company offers a range of services including email design, HTML development, marketing automation, and CRM strategy. They cater to various businesses, helping them enhance customer engagement through tailored email campaigns. EmailSoldiers has collaborated with over 200 clients, showcasing their ability to deliver effective marketing solutions. Their expertise spans multiple email service providers, making them a versatile partner for businesses seeking to optimize their email marketing efforts. The company has not reported any funding, indicating a self-sustained growth model.

22. SendPulse

• Website: sendpulse.com
• Ownership type: Venture Capital
• Headquarters: New York, New York, United States (USA)
• Employee distribution: Ukraine 90%, Brazil 5%, Belarus 3%, Other 2%
• Latest funding: Seed, $130,000, August 2016
• Founded year: 2015
• Headcount: 51-200
• LinkedIn: sendpulse

SendPulse is a marketing automation platform based in New York, New York, that provides a suite of digital marketing tools aimed at enhancing customer engagement and streamlining marketing processes. Founded in 2015, the company has grown to employ around 164 people, with a significant portion of its workforce based in Ukraine. SendPulse offers a variety of services, including email campaigns, chatbots, SMS marketing, and a built-in CRM system. The platform is designed to help businesses manage their marketing efforts across multiple channels, allowing for a cohesive approach to customer communication. SendPulse has received seed funding, which indicates investor confidence in its business model and growth potential. The company also emphasizes user education through resources like the SendPulse Academy, which provides online courses to develop marketing skills.

23. Mailmodo

• Website: mailmodo.com
• Ownership type: Corporate
• Headquarters: San Francisco, California, United States (USA)
• Employee distribution: India 79%, United States (USA) 17%, United Arab Emirates 4%
• Latest funding: May 2018
• Founded year: 2020
• Headcount: 11-50
• LinkedIn: mailmodo

Mailmodo, established in 2020 and based in San Francisco, California, is an email marketing platform that specializes in creating interactive emails and automating email journeys. The company offers a suite of tools designed to enhance customer engagement and improve email deliverability. Their platform features a drag-and-drop editor, AMP email capabilities, smart segmentation, and automated email journeys, catering to businesses looking to optimize their email marketing strategies. Mailmodo's clientele includes a variety of businesses across multiple sectors, indicating its broad applicability. The company has a significant presence in India, with a majority of its workforce located there, and it has been recognized for its innovative approach to email marketing, particularly in the realm of interactive content. Mailmodo's commitment to improving user experience and engagement through email marketing positions it as a relevant player in the industry.

Email Marketing Insights: Key Companies in the US

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