Company lists · Data refreshed September 2026
Top 25 Email marketing optimization services based in the United States
RevenueBase identified 1,345 email marketing optimization services headquartered in the United States as of September 2026 and tracks 10,080 professional contacts across them, including 2,865 with verified work emails. New York is the largest hub.
This list covers email marketing optimization services headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest email marketing optimization services based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,483 contacts → | ||||
Partial evidence “The Mailchimpossibilities are endless when you create, automate, and optimize your marketing with Mailchimp.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 2 | 163 contacts → | ||||
Partial evidence “Stirista is the only company that combines data, email, and digital execution to help clients acquire and retain customers by creating a data-driven, repeatable, and scalable…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 3 | 137 contacts → | ||||
Indirect evidence “We believe powerful connections propel business growth.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 4 | 122 contacts → | ||||
Strong evidence “In 2005, we started as a web design agency, but we soon discovered email marketing and fell in love with it.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 5 | 118 contacts → | ||||
Partial evidence “TargetBay is the all-in-one marketing and customer engagement suite designed for ecommerce businesses looking to accelerate growth.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 6 | 115 contacts → | ||||
Partial evidence “Benchmark helps busy marketers move faster and make a bigger impact with email.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 7 | 109 contacts → | ||||
Partial evidence “RankFast is a data-driven digital marketing agency dedicated to accelerating growth for Ecommerce, SaaS, Local Businesses, and Enterprises.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 8 | 106 contacts → | ||||
Partial evidence “Plataforma de Marketing Multicanal, simple y potenciado por IA.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 9 | 91 contacts → | ||||
Indirect evidence “Tailor Every Touchpoint.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 10 | 90 contacts → | ||||
Strong evidence “For over 20 years, AWeber has helped entrepreneurs and small business owners connect with their prospects and customers through powerfully-simple email marketing solutions.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 11 | 89 contacts → | ||||
Strong evidence “Instapage is a complete growth marketing platform with the #1-rated builder for PPC, SEO, demand generation, A/B testing, personalization, and email automation.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 12 | 88 contacts → | ||||
Partial evidence “With more than a decade of experience Paper Street Media can help you leverage manpower and increase your capacity for marketing and web design projects.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 13 | 88 contacts → | ||||
Strong evidence “Mailmodo is a complete email marketing solution enabling users to create and send app-like interactive emails to improve email conversions.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 14 | 82 contacts → | ||||
Strong evidence “AI-powered behavioral marketing and CRO partner for ecommerce brands, driving personalization, higher order values, and cart abandonment recovery through managed on-site and email…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 15 | 79 contacts → | ||||
Partial evidence “Site Impact is your trusted, turnkey partner that empowers agencies with one of the country's largest, data-driven, multichannel marketing solutions.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 16 | 71 contacts → | ||||
Partial evidence “WE ARE MARRINA One of the most time-consuming yet highly-valuable aspects of the marketer’s role is Email Production.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 17 | 70 contacts → | ||||
Indirect evidence “At Litmus, we know the importance of continuous innovation.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 18 | 69 contacts → | ||||
Partial evidence “Email & SMS for online brands that need the tools & coaching to grow sales.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 19 | 65 contacts → | ||||
Partial evidence “For over 12 years, our agency has been delivering high-impact digital marketing strategies that drive real business growth.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 20 | 63 contacts → | ||||
Indirect evidence “Cybba helps brands turn advertising into measurable business outcomes.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 21 | 61 contacts → | ||||
Indirect evidence “High-Velocity A/B Test Development & CRO Support Agency BrillMark delivers seamless A/B test development, CRO support, and custom web development, integrating with your team to…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 22 | 60 contacts → | ||||
Strong evidence “Since 2001, Alchemy Worx has provided a full-service solution, with best-in-class email marketing, paid social, and SMS support, to e-commerce and enterprise-level companies.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 23 | 51 contacts → | ||||
Partial evidence “Premier Email & SMS Retention Partners for Ecommerce Brands We handle everything that has to do with email.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 24 | 49 contacts → | ||||
Indirect evidence “MonsterClaw started as a one-man show back in 2007 and now we’re a team of 40+ super dedicated & passionate in-house digital marketers backed up by a large remote team from around…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 25 | 49 contacts → | ||||
Strong evidence “InboxArmy is an elite, full-service email marketing agency offering the full spectrum of email marketing services, including- Full-Service Campaign Management - Email Template…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: email marketing optimization services. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names email marketing optimization services.
- Partial evidence
- Its own public description names part of email marketing optimization services, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name email marketing optimization services. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 1,345 email marketing optimization services based in the United States
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Email marketing optimization services based in the United States at a glance
As of Sep 28, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 1,345 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among email marketing optimization services, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United States whose own description of what they do matches “email marketing optimization services”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names email marketing optimization services), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among email marketing optimization services, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 2,865 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 28, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Email marketing optimization services by metro
- Email marketing optimization services in New York75
- Email marketing optimization services in Los Angeles43
- Email marketing optimization services in Austin34
- Email marketing optimization services in Chicago32
- Email marketing optimization services in Miami29
- Email marketing optimization services in Sheridan26
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names email marketing optimization services, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many email marketing optimization services are there based in the United States?
RevenueBase identified 1,345 email marketing optimization services headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Intuit Mailchimp, headquartered in Atlanta, tops this list with the largest team on record.
Which city has the most email marketing optimization services?
New York leads with 75 headquartered companies, followed by Los Angeles (43) and Austin (34).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 2,865 verified decision-maker contacts tracked across these 1,345 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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