Company lists · Data refreshed September 2026

Top 25 Email marketing optimization firms based in the United States

Name: Email marketing optimization firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 1, 2026 1,817 companies tracked

RevenueBase identified 1,817 email marketing optimization firms headquartered in the United States as of September 2026 and tracks 12,589 professional contacts across them, including 3,616 with verified work emails and 3,839 with mobile numbers. New York is the largest hub.

This list covers email marketing optimization firms 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 1, 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.

How to read this list RevenueBase Smart Search rating on every row Refreshed Sep 1, 2026 86% judged on-target in blind review

1,817Companies

12,589Contacts tracked

3,616Verified emails

3,839Mobile numbers

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The 25 largest email marketing optimization firms based in the United States

Ranked by team size

Top 25 of 1,817 email marketing optimization firms based in the United States, ranked by team size, largest first. Data refreshed Sep 1, 2026. RevenueBase Smart Search rates how each company's information relates to email marketing optimization firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Intuit Mailchimp	Partial evidence	Oakland, CA, United States	1,001-5,000	1,557 contacts →
	Partial evidence “The Mailchimpossibilities are endless when you create, automate, and optimize your marketing with Mailchimp.” Source: RevenueBase Database · checked Sep 1, 2026
2	Ebrandz LLP	Indirect evidence	New York, NY, United States	201-500	427 contacts →
	Indirect evidence “Within a short span, eBrandz has seen enormous growth.” Source: RevenueBase Database · checked Sep 1, 2026
3	Stirista	Partial evidence	San Antonio, TX, United States	51-200	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 1, 2026
4	Icontact	Indirect evidence	Morrisville, NC, United States	51-200	136 contacts →
	Indirect evidence “We believe powerful connections propel business growth.” Source: RevenueBase Database · checked Sep 1, 2026
5	Rankfast Search Marketing Company	Partial evidence	Chicago, IL, United States	51-200	108 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 1, 2026
6	Zerobounce	Partial evidence	Santa Barbara, CA, United States	51-200	106 contacts →
	Partial evidence “ZeroBounce is an email validation, deliverability and email finding platform helping businesses reduce bounces and land their emails in the inbox.” Source: RevenueBase Database · checked Sep 1, 2026
7	Aweber	Strong evidence	Doylestown, PA, United States	51-200	93 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 1, 2026
8	Site Impact	Partial evidence	Coral Springs, FL, United States	51-200	80 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 1, 2026
9	Tribune Direct	Partial evidence	Irwindale, CA, United States	201-500	76 contacts →
	Partial evidence “We make complex marketing simple.” Source: RevenueBase Database · checked Sep 1, 2026
10	Marrina Decisions	Partial evidence	Santa Clara, CA, United States	51-200	69 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 1, 2026
11	PRIVY	Partial evidence	Boston, MA, United States	51-200	68 contacts →
	Partial evidence “Email & SMS for online brands that need the tools & coaching to grow sales.” Source: RevenueBase Database · checked Sep 1, 2026
12	Elit-Web	Partial evidence	Schaumburg, United States	201-500	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 1, 2026
13	Flowium	Strong evidence	New York, United States	51-200	62 contacts →
	Strong evidence “Flowium is a retention marketing agency helping ecommerce brands grow repeat revenue through thoughtful email and lifecycle marketing.” Source: RevenueBase Database · checked Sep 1, 2026
14	Brillmark	Indirect evidence	Hayward, CA, United States	51-200	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 1, 2026
15	Giant Partners America's 1 Data Driven Marketing Agency	Indirect evidence	Thousand Oaks, CA, United States	51-200	58 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 1, 2026
16	Inboxarmy	Strong evidence	Grapevine, TX, United States	51-200	50 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 1, 2026
17	Vast Bridges	Partial evidence	Remote, United States	51-200	29 contacts →
	Partial evidence “Vast Bridges creates exceptional direct marketing and unparalleled sales conversions for your business by utilizing our propriety analytics, innovative marketing channels and…” Source: RevenueBase Database · checked Sep 1, 2026
18	Ilawyermarketing	Partial evidence	San Diego, CA, United States	51-200	28 contacts →
	Partial evidence “iLawyer Marketing is a California based law firm marketing company that works exclusively with law firms all across the United States.” Source: RevenueBase Database · checked Sep 1, 2026
19	Infodatasphere	Partial evidence	Melville, NY, United States	201-500	27 contacts →
	Partial evidence “InfoDataSphere is a growth enablement partner, helping businesses to grow in direct marketing.” Source: RevenueBase Database · checked Sep 1, 2026
20	Forencisdata	Partial evidence	New York, United States	51-200	21 contacts →
	Partial evidence “Forencis Data provides Data-Driven, Data Intelligence, Digital Marketing and E mail Marketing Services with optimized strategies for effective results.” Source: RevenueBase Database · checked Sep 1, 2026
21	Real Magnet	Strong evidence	Bethesda, MD, United States	51-200	18 contacts →
	Strong evidence “Real Magnet is a leading marketing automation platform that helps businesses attract, engage and deliver better email, marketing, social and mobile campaigns.” Source: RevenueBase Database · checked Sep 1, 2026
22	Affinnova, INC	Partial evidence	Waltham, MA, United States	201-500	15 contacts →
	Partial evidence “Affinnova is a global marketing technology company that dramatically improves innovation and marketing success rates.” Source: RevenueBase Database · checked Sep 1, 2026
23	Strata-G Communications	Partial evidence	Cincinnati, OH, United States	51-200	13 contacts →
	Partial evidence “We craft business-building, integrated marketing solutions that meet your prospects where they live, and compel them to act.” Source: RevenueBase Database · checked Sep 1, 2026
24	Global Email Lists	Strong evidence	Beaverton, OR, United States	51-200	12 contacts →
	Strong evidence “Since the inception Global Email Lists is committed to provide quality e-mail marketing and its related services to clients worldwide.” Source: RevenueBase Database · checked Sep 1, 2026
25	BAD Marketing	Partial evidence	Alpharetta, GA, United States	51-200	11 contacts →
	Partial evidence “BAD Marketing is a digital marketing firm dedicated to scaling our client's brands through unique marketing strategies.” Source: RevenueBase Database · checked Sep 1, 2026

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 firms. 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 firms.
Partial evidence: Its own public description names part of email marketing optimization firms, 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 firms. 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 1,817 email marketing optimization firms based in the United States

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Email marketing optimization firms based in the United States at a glance

As of Sep 1, 2026

28.7%Verified-email coverage

30.5%Mobile-number coverage

6.9Average contacts per company

1-10Median size (employees)

5.3%Largest-city concentration · New York

Sep 1, 2026Page data refreshed

Companies by employee count

1-10

1,248

11-50

438

51-200

201-500

501-1,000

1,001-5,000

10001+

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 firms, 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 firms”. 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 firms), 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 firms, 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, 3,616 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 1, 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 firms by metro

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 firms, 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 firms are there based in the United States?

RevenueBase identified 1,817 email marketing optimization firms 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 Oakland, tops this list with the largest team on record.

Which city has the most email marketing optimization firms?

New York leads with 96 headquartered companies, followed by Los Angeles (63) and Chicago (44).

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 3,616 verified decision-maker contacts tracked across these 1,817 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 1, 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.