Company lists · Data refreshed September 2026

Top 25 Email marketing software companies based in the United States

Name: Email marketing software companies 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 602 companies tracked

RevenueBase identified 602 email marketing software companies headquartered in the United States as of September 2026 and tracks 8,758 professional contacts across them, including 2,421 with verified work emails and 2,571 with mobile numbers. New York is the largest hub.

This list covers email marketing software companies 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

602Companies

8,758Contacts tracked

2,421Verified emails

2,571Mobile numbers

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The 25 largest email marketing software companies based in the United States

Ranked by team size

Top 25 of 602 email marketing software companies 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 software companies: 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	Marigold	Partial evidence	Nashville, TN, United States	201-500	818 contacts →
	Partial evidence “Marigold is a global marketing technology company focused on delivering relationship marketing solutions for growing organizations.” Source: RevenueBase Database · checked Sep 1, 2026
3	Listrak	Partial evidence	Lititz, PA, United States	201-500	298 contacts →
	Partial evidence “Listrak is the person-first marketing automation platform that seamlessly integrates data, identity, and cross-channel messaging to power hyper-personalized customer experiences.” Source: RevenueBase Database · checked Sep 1, 2026
4	Sendpulse	Strong evidence	New York, United States	51-200	181 contacts →
	Strong evidence “SendPulse is an all-in-one automation platform that specializes in email, SMS, and chatbot marketing and offers a complete toolkit for creating landing pages, developing online…” Source: RevenueBase Database · checked Sep 1, 2026
5	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
6	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
7	CLICK	Partial evidence	Atlanta, GA, United States	201-500	134 contacts →
	Partial evidence “Click is the only complete marketing technology solution that is natively integrated with Microsoft Dynamics CRM.” Source: RevenueBase Database · checked Sep 1, 2026
8	BCC Software	Indirect evidence	Rochester, NY, United States	51-200	125 contacts →
	Indirect evidence “Who are we?” Source: RevenueBase Database · checked Sep 1, 2026
9	Mailerlite	Strong evidence	San Francisco, CA, United States	51-200	118 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 1, 2026
10	Benchmark Email	Partial evidence	St Louis, MO, United States	51-200	116 contacts →
	Partial evidence “Benchmark helps busy marketers move faster and make a bigger impact with email.” Source: RevenueBase Database · checked Sep 1, 2026
11	Genesis Digital, LLC	Strong evidence	Las Vegas, NV, United States	51-200	104 contacts →
	Strong evidence “Genesis Digital empowers entrepreneurs and small business owners to achieve financial freedom with affordable and easy-to-use marketing and sales automation software, and a…” Source: RevenueBase Database · checked Sep 1, 2026
12	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
13	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
14	Flodesk	Partial evidence	San Francisco, CA, United States	51-200	76 contacts →
	Partial evidence “Flodesk makes simple, intuitive software tools to help entrepreneurs grow their businesses.” Source: RevenueBase Database · checked Sep 1, 2026
15	Litmus	Indirect evidence	San Mateo, CA, United States	51-200	71 contacts →
	Indirect evidence “At Litmus, we know the importance of continuous innovation.” Source: RevenueBase Database · checked Sep 1, 2026
16	Constant Contact Lead GEN & CRM	Partial evidence	Gainesville, FL, United States	1,001-5,000	71 contacts →
	Partial evidence “SharpSpring is a full-funnel marketing and sales automation platform that unites marketing and sales teams to launch and track targeted campaigns and personalize every interaction…” Source: RevenueBase Database · checked Sep 1, 2026
17	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
18	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
19	Engagebay	Partial evidence	Wilmington, DE, United States	51-200	57 contacts →
	Partial evidence “EngageBay offers innovative AI-powered marketing and sales tools designed for small to medium-sized businesses.” Source: RevenueBase Database · checked Sep 1, 2026
20	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
21	Sendcrux Labs	Partial evidence	Green Cove Springs, FL, United States	51-200	47 contacts →
	Partial evidence “Sendcrux labs is building sales and marketing automation tools to help organisations to achieve the following goals cost-effectively- Boost revenues- Lead Generation- Nurture…” Source: RevenueBase Database · checked Sep 1, 2026
22	Sendlane	Partial evidence	San Diego, CA, United States	51-200	46 contacts →
	Partial evidence “Truly unified email, SMS, reviews, and forms.” Source: RevenueBase Database · checked Sep 1, 2026
23	Experiture	Partial evidence	Brooklyn, NY, United States	51-200	40 contacts →
	Partial evidence “Experiture empowers businesses to harness the full potential of their customer data for marketing through our leading-edge Customer Engagement Platform.” Source: RevenueBase Database · checked Sep 1, 2026
24	IPOST	Partial evidence	San Mateo, CA, United States	51-200	38 contacts →
	Partial evidence “iPost is a leading email-sending platform purpose-built to solve real challenges in highly regulated and other data- and content-sensitive industries, including gaming, legal…” Source: RevenueBase Database · checked Sep 1, 2026
25	Whatcounts	Strong evidence	Seattle, WA, United States	51-200	37 contacts →
	Strong evidence “WhatCounts is an email marketing and personalization platform empowering marketers to elevate customer targeting and daily email strategy and execution.” 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 software companies. 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 software companies.
Partial evidence: Its own public description names part of email marketing software companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name email marketing software companies. 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 602 email marketing software companies based in the United States

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Email marketing software companies based in the United States at a glance

As of Sep 1, 2026

27.6%Verified-email coverage

29.4%Mobile-number coverage

14.5Average contacts per company

1-10Median size (employees)

7.3%Largest-city concentration · New York

Sep 1, 2026Page data refreshed

Companies by employee count

1-10

308

11-50

200

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 software companies, 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 software companies”. 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 software companies), 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 software companies, 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, 2,421 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 software companies by metro

Email marketing software companies in New York44

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 software companies, 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 software companies are there based in the United States?

RevenueBase identified 602 email marketing software companies 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 software companies?

New York leads with 44 headquartered companies, followed by San Francisco (19) and Chicago (18).

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 2,421 verified decision-maker contacts tracked across these 602 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.