Company lists · Data refreshed September 2026

Top 25 B2B email marketing platforms based in the United States

Name: B2B email marketing platforms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 1,539 companies tracked

RevenueBase identified 1,539 B2B email marketing platforms headquartered in the United States as of September 2026 and tracks 46,242 professional contacts across them, including 19,367 with verified work emails. New York is the largest hub.

This list covers B2B email marketing platforms 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 27, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 27, 2026 86% judged on-target in blind review

1,539Companies

46,242Contacts tracked

19,367Verified emails

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The 25 largest B2B email marketing platforms based in the United States

Ranked by team size

Top 25 of 1,539 B2B email marketing platforms based in the United States, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to B2B email marketing platforms: 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	Hubspot	Partial evidence	Cambridge, MA, United StatesHQ checked Sep 27, 2026	5,001-10,000	11,077 contacts →
	Partial evidence “HubSpot is a leading agentic customer platform that provides software and support to help businesses grow better.” Source: RevenueBase Database · checked Sep 27, 2026
2	Klaviyo	Indirect evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	1,001-5,000	2,789 contacts →
	Indirect evidence “Klaviyo (NYSE: KVYO) is the autonomous B2C CRM.” Source: RevenueBase Database · checked Sep 27, 2026
3	BRAZE	Partial evidence	New York, NY, United StatesHQ checked Sep 27, 2026	1,001-5,000	2,142 contacts →
	Partial evidence “Braze is the leading customer engagement platform that empowers brands to Be Absolutely Engaging.™ Braze allows any marketer to collect and take action on any amount of data from…” Source: RevenueBase Database · checked Sep 27, 2026
4	Constant Contact	Partial evidence	Waltham, MA, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,611 contacts →
	Partial evidence “We deliver for small businesses with powerful tools to simplify and amplify digital marketing.” Source: RevenueBase Database · checked Sep 27, 2026
5	Intuit Mailchimp	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,483 contacts →
	Partial evidence “The Mailchimpossibilities are endless when you create, automate, and optimize your marketing with Mailchimp.” Source: RevenueBase Database · checked Sep 27, 2026
6	Moengage	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 27, 2026	501-1,000	908 contacts →
	Partial evidence “MoEngage is an agentic customer engagement platform for the customer-obsessed marketers and product owners.” Source: RevenueBase Database · checked Sep 27, 2026
7	Activecampaign	Strong evidence	Chicago, IL, United StatesHQ checked Sep 27, 2026	1,001-5,000	863 contacts →
	Strong evidence “ActiveCampaign is the AI-first autonomous marketing platform built to transform how marketers, agencies, and entrepreneurs work.” Source: RevenueBase Database · checked Sep 27, 2026
8	Marigold	Partial evidence	Nashville, TN, United StatesHQ checked Sep 27, 2026	201-500	820 contacts →
	Partial evidence “Marigold is a global marketing technology company focused on delivering relationship marketing solutions for growing organizations.” Source: RevenueBase Database · checked Sep 27, 2026
9	Anteriad	Indirect evidence	New York, NY, United StatesHQ checked Sep 27, 2026	501-1,000	740 contacts →
	Indirect evidence “Data Driven.” Source: RevenueBase Database · checked Sep 27, 2026
10	Optimove	Partial evidence	New York, NY, United StatesHQ checked Sep 27, 2026	501-1,000	588 contacts →
	Partial evidence “Optimove, the creator of Positionless Marketing, frees marketing teams from the limitations of fixed roles, giving every marketer the power to execute any marketing task instantly…” Source: RevenueBase Database · checked Sep 27, 2026
11	Adobe Marketo	Partial evidence	San Jose, CA, United StatesHQ checked Sep 27, 2026	1,001-5,000	572 contacts →
	Partial evidence “Adobe Marketo Engage offers the leading Engagement Platform that empowers marketers to build brand value, grow revenue, and prove impact.” Source: RevenueBase Database · checked Sep 27, 2026
12	Acoustic	Indirect evidence	Conway, AR, United StatesHQ checked Sep 27, 2026	501-1,000	539 contacts →
	Indirect evidence “Acoustic, L.P.” Source: RevenueBase Database · checked Sep 27, 2026
13	Movingdneedle Pvt. LTD	Strong evidence	Sterling Heights, MI, United StatesHQ checked Sep 27, 2026	51-200	528 contacts →
	Strong evidence “movingDneedle is a Business to Business Sales Lead Generation Company that provides fast and scalable, sales qualified leads through its unique Personalized Email Marketing…” Source: RevenueBase Database · checked Sep 27, 2026
14	customer.io	Partial evidence	Portland, OR, United StatesHQ checked Sep 27, 2026	201-500	446 contacts →
	Partial evidence “Create personalized customer journeys that engage and convert with our versatile customer engagement platform.” Source: RevenueBase Database · checked Sep 27, 2026
15	Hightouch	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 27, 2026	201-500	358 contacts →
	Strong evidence “Hightouch is an Agentic Marketing Platform powered by the industry-leading Composable CDP.” Source: RevenueBase Database · checked Sep 27, 2026
16	Acceligize	Strong evidence	Houston, TX, United StatesHQ checked Sep 27, 2026	201-500	349 contacts →
	Strong evidence “Acceligize is a global B2B marketing company, providing full funnel lead generation and content marketing solutions to some of the world’s finest technology companies, media…” Source: RevenueBase Database · checked Sep 27, 2026
17	Madison Logic	Indirect evidence	New York, NY, United StatesHQ checked Sep 27, 2026	201-500	334 contacts →
	Indirect evidence “Since 2005, Madison Logic has empowered the largest and fastest-growing companies to convert their best accounts faster.” Source: RevenueBase Database · checked Sep 27, 2026
18	marketing.com	Partial evidence	Eureka, MO, United StatesHQ checked Sep 27, 2026	1,001-5,000	309 contacts →
	Partial evidence “From click to print and everything in between, we’re not changing marketing, just how it’s done.” Source: RevenueBase Database · checked Sep 27, 2026
19	Integrate	Partial evidence	Phoenix, AZ, United StatesHQ checked Sep 27, 2026	51-200	301 contacts →
	Partial evidence “Enabling B2B Marketers Connect data across demand channels Govern data + ensure integrity Analyze impact + inform next best investments” Source: RevenueBase Database · checked Sep 27, 2026
20	Listrak	Strong evidence	Lititz, PA, United StatesHQ checked Sep 27, 2026	201-500	295 contacts →
	Strong 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 27, 2026
21	1105 Media	Partial evidence	Woodland Hills, CA, United StatesHQ checked Sep 27, 2026	51-200	278 contacts →
	Partial evidence “1105 Media, Inc, is a leading business-to-business (B2B) services provider whose sole mission is to help our customers grow their business.” Source: RevenueBase Database · checked Sep 27, 2026
22	Warrior Plus	Strong evidence	Henderson, NV, United StatesHQ checked Sep 27, 2026	n/a	260 contacts →
	Strong evidence “Best-in-class sales & marketing automation platform and marketplace for digital business owners and online marketers” Source: RevenueBase Database · checked Sep 27, 2026
23	Intentsify	Partial evidence	Westwood, MA, United StatesHQ checked Sep 27, 2026	201-500	217 contacts →
	Partial evidence “Intentsify empowers B2B marketers to turn buying signals into pipeline by enhancing conversions among decision makers at priority accounts throughout their buying journey.” Source: RevenueBase Database · checked Sep 27, 2026
24	instantly.ai	Partial evidence	Sheridan, WY, United StatesHQ checked Sep 27, 2026	51-200	215 contacts →
	Partial evidence “All-in-one outreach platform for business growth.” Source: RevenueBase Database · checked Sep 27, 2026
25	Act-On Software	Strong evidence	Portland, OR, United StatesHQ checked Sep 27, 2026	201-500	210 contacts →
	Strong evidence “Act-On Software provides the innovative marketing automation platform for marketers who think big and act boldly.” Source: RevenueBase Database · checked Sep 27, 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: B2B email marketing platforms. 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 B2B email marketing platforms.
Partial evidence: Its own public description names part of B2B email marketing platforms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name B2B email marketing platforms. 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 1,539 B2B email marketing platforms based in the United States

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B2B email marketing platforms based in the United States at a glance

As of Sep 27, 2026

41.9%Verified-email coverage

30.0Average contacts per company

11-50Median size (employees)

7.4%Largest-city concentration · New York

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

733

11-50

526

51-200

183

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 1,539 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 B2B email marketing platforms, 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 “B2B email marketing platforms”. 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 B2B email marketing platforms), 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 B2B email marketing platforms, 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, 19,367 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 27, 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.

B2B email marketing platforms 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 B2B email marketing platforms, 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 B2B email marketing platforms are there based in the United States?

RevenueBase identified 1,539 B2B email marketing platforms 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?

Hubspot, headquartered in Cambridge, tops this list with the largest team on record.

Which city has the most B2B email marketing platforms?

New York leads with 114 headquartered companies, followed by San Francisco (52) and Sheridan (40).

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 19,367 verified decision-maker contacts tracked across these 1,539 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 27, 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.