Company lists · Data refreshed September 2026

Top 25 B2B marketing automation software companies based in the United States

Name: B2B marketing automation 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 27, 2026 2,103 companies tracked

RevenueBase identified 2,103 B2B marketing automation software companies headquartered in the United States as of September 2026 and tracks 62,275 professional contacts across them, including 23,100 with verified work emails. New York is the largest hub.

This list covers B2B marketing automation 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 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

2,103Companies

62,275Contacts tracked

23,100Verified emails

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The 25 largest B2B marketing automation software companies based in the United States

Ranked by team size

Top 25 of 2,103 B2B marketing automation software companies 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 marketing automation 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	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	Zoominfo	Indirect evidence	Vancouver, WA, United StatesHQ checked Sep 27, 2026	1,001-5,000	4,029 contacts →
	Indirect evidence “ZoomInfo (NASDAQ: GTM) is the go-to-market platform that helps businesses find, acquire and grow their customers.” Source: RevenueBase Database · checked Sep 27, 2026
3	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
4	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
5	6sense	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,443 contacts →
	Partial evidence “6sense is on a mission to revolutionize the way B2B organizations create revenue by predicting customers most likely to buy and recommending the best course of action to engage…” Source: RevenueBase Database · checked Sep 27, 2026
6	Centro	Strong evidence	Chicago, IL, United StatesHQ checked Sep 27, 2026	501-1,000	1,178 contacts →
	Strong evidence “Basis Technologies is a global provider of workflow automation, intelligence and programmatic trading software for the marketing enterprise.” Source: RevenueBase Database · checked Sep 27, 2026
7	Demandscience	Indirect evidence	Boston, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,087 contacts →
	Indirect evidence “With proprietary data and omni-channel activation like events, content, programmatic and chat, we cut through the noise to reach entire buyer groups, driving engagement and impact…” Source: RevenueBase Database · checked Sep 27, 2026
8	Cience	Partial evidence	Miami, FL, United StatesHQ checked Sep 27, 2026	201-500	1,068 contacts →
	Partial evidence “CIENCE Technologies, Inc, founded in 2015 and headquartered in Denver, CO, is a pioneering global company in lead generation software and services, committed to transforming the…” Source: RevenueBase Database · checked Sep 27, 2026
9	2x	Strong evidence	Malvern, PA, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,046 contacts →
	Strong evidence “2X is the global leader in B2B marketing-as-a-service (MaaS), a subscription-based alternative to traditional B2B marketing delivery models.” Source: RevenueBase Database · checked Sep 27, 2026
10	Activecampaign	Partial evidence	Chicago, IL, United StatesHQ checked Sep 27, 2026	1,001-5,000	863 contacts →
	Partial 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
11	Ziff Davis Performance Marketing	Indirect evidence	Austin, TX, United StatesHQ checked Sep 27, 2026	1,001-5,000	821 contacts →
	Indirect evidence “ZDPM is the coming together of Salesify and DemandShore.” Source: RevenueBase Database · checked Sep 27, 2026
12	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
13	Infuse	Strong evidence	Boca Raton, FL, United StatesHQ checked Sep 27, 2026	1,001-5,000	796 contacts →
	Strong evidence “Demand Excellence Delivered We are INFUSE, a global B2B demand and revenue marketing performance company.” Source: RevenueBase Database · checked Sep 27, 2026
14	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
15	Salebuild	Partial evidence	Redwood City, CA, United StatesHQ checked Sep 27, 2026	n/a	708 contacts →
	Partial evidence “Salesify, a leading provider of B2B demand generation services, helps our clients create pipeline and accelerate revenue by identifying, profiling, nurturing and connecting with…” Source: RevenueBase Database · checked Sep 27, 2026
16	simpli.fi	Indirect evidence	Fort Worth, TX, United StatesHQ checked Sep 27, 2026	501-1,000	680 contacts →
	Indirect evidence “Simpli.fi is a real-world media platform that connects digital intent with physical movement, helping brands reach audiences in the right place, at the right moment, to drive…” Source: RevenueBase Database · checked Sep 27, 2026
17	Multiview	Strong evidence	Irving, TX, United StatesHQ checked Sep 27, 2026	501-1,000	616 contacts →
	Strong evidence “Multiview is a B2B digital marketing agency helping associations and businesses reach, engage and grow their most valued relationships.” Source: RevenueBase Database · checked Sep 27, 2026
18	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
19	Adobe Marketo	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 27, 2026	1,001-5,000	572 contacts →
	Indirect 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
20	Callbox INC	Indirect evidence	Encino, CA, United StatesHQ checked Sep 27, 2026	201-500	499 contacts →
	Indirect evidence “Callbox is the #1 trusted lead generation services and AI-Powered Growth Strategy Partner by enterprise and scaling businesses in the USA, Canada, Asia Pacific, Latin America…” Source: RevenueBase Database · checked Sep 27, 2026
21	Demandshore	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 27, 2026	501-1,000	478 contacts →
	Strong evidence “About DemandShore Since 2004, we’ve been working hard to deliver value to Sales & Marketing professionals across B2B Technology companies globally.” Source: RevenueBase Database · checked Sep 27, 2026
22	HCL Unica	Strong evidence	Sunnyvale, CA, United StatesHQ checked Sep 27, 2026	10001+	381 contacts →
	Strong evidence “Collaborate, innovate and drive the business forward with HCLSoftware's Digital Transformation marketing software solution.” Source: RevenueBase Database · checked Sep 27, 2026
23	Hightouch	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 27, 2026	201-500	358 contacts →
	Partial evidence “Hightouch is an Agentic Marketing Platform powered by the industry-leading Composable CDP.” Source: RevenueBase Database · checked Sep 27, 2026
24	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
25	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

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 marketing automation 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 B2B marketing automation software companies.
Partial evidence: Its own public description names part of B2B marketing automation software companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name B2B marketing automation 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 2,103 B2B marketing automation software companies based in the United States

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B2B marketing automation software companies based in the United States at a glance

As of Sep 27, 2026

37.1%Verified-email coverage

29.6Average contacts per company

1-10Median size (employees)

5.3%Largest-city concentration · New York

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

1,125

11-50

641

51-200

230

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 2,103 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 marketing automation 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 “B2B marketing automation 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 B2B marketing automation 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 B2B marketing automation 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, 23,100 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 marketing automation software companies 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 marketing automation 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 B2B marketing automation software companies are there based in the United States?

RevenueBase identified 2,103 B2B marketing automation 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?

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

Which city has the most B2B marketing automation software companies?

New York leads with 111 headquartered companies, followed by San Francisco (77) and Los Angeles (52).

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 23,100 verified decision-maker contacts tracked across these 2,103 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.