Company lists · Data refreshed September 2026

Top 25 Marketing automation software for B2B companies based in the United States

Name: Marketing automation software for B2B 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 21, 2026 2,087 companies tracked

RevenueBase identified 2,087 marketing automation software for B2B companies headquartered in the United States as of September 2026 and tracks 55,807 professional contacts across them, including 21,692 with verified work emails. New York is the largest hub.

This list covers marketing automation software for B2B 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 21, 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 21, 2026 86% judged on-target in blind review

2,087Companies

55,807Contacts tracked

21,692Verified emails

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

Ranked by team size

Top 25 of 2,087 marketing automation software for B2B companies based in the United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to marketing automation software for B2B 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 21, 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 21, 2026
2	Zoominfo	Indirect evidence	Vancouver, WA, United StatesHQ checked Sep 21, 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 21, 2026
3	Klaviyo	Indirect evidence	Boston, MA, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,789 contacts →
	Indirect evidence “Klaviyo (NYSE: KVYO) is the autonomous B2C CRM.” Source: RevenueBase Database · checked Sep 21, 2026
4	Intuit Mailchimp	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 21, 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 21, 2026
5	6sense	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 21, 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 21, 2026
6	Centro	Strong evidence	Chicago, IL, United StatesHQ checked Sep 21, 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 21, 2026
7	Demandscience	Indirect evidence	Boston, United StatesHQ checked Sep 21, 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 21, 2026
8	Cience	Partial evidence	Miami, FL, United StatesHQ checked Sep 21, 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 21, 2026
9	2x	Strong evidence	Malvern, PA, United StatesHQ checked Sep 21, 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 21, 2026
10	Activecampaign	Partial evidence	Chicago, IL, United StatesHQ checked Sep 21, 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 21, 2026
11	Demandbase	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	501-1,000	861 contacts →
	Indirect evidence “Demandbase is the only pipeline AI platform that empowers GTM teams to automate growth at scale.” Source: RevenueBase Database · checked Sep 21, 2026
12	Marigold	Partial evidence	Nashville, TN, United StatesHQ checked Sep 21, 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 21, 2026
13	simpli.fi	Indirect evidence	Fort Worth, TX, United StatesHQ checked Sep 21, 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 21, 2026
14	Optimove	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 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 21, 2026
15	Adobe Marketo	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 21, 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 21, 2026
16	Callbox INC	Indirect evidence	Encino, CA, United StatesHQ checked Sep 21, 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 21, 2026
17	Marketone International	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 21, 2026	201-500	431 contacts →
	Indirect evidence “MarketOne is a global demand generation agency.” Source: RevenueBase Database · checked Sep 21, 2026
18	HCL Unica	Strong evidence	Sunnyvale, CA, United StatesHQ checked Sep 21, 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 21, 2026
19	Invoca	Partial evidence	West Hollywood, CA, United StatesHQ checked Sep 21, 2026	201-500	368 contacts →
	Partial evidence “Invoca is the revenue execution and platform leader that helps marketing, commerce, and contact center teams turn every conversation into revenue.” Source: RevenueBase Database · checked Sep 21, 2026
20	Hightouch	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 21, 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 21, 2026
21	Acceligize	Strong evidence	Houston, TX, United StatesHQ checked Sep 21, 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 21, 2026
22	Validity INC	Indirect evidence	Boston, MA, United StatesHQ checked Sep 21, 2026	201-500	345 contacts →
	Indirect evidence “Validity created the AI platform behind the world's most successful email programs.” Source: RevenueBase Database · checked Sep 21, 2026
23	Madison Logic	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 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 21, 2026
24	Callrail	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 21, 2026	201-500	332 contacts →
	Partial evidence “CallRail is the lead engagement platform that makes it easy for businesses to attract more leads, convert more customers, and optimize their marketing.” Source: RevenueBase Database · checked Sep 21, 2026
25	Nextroll	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	201-500	320 contacts →
	Partial evidence “NextRoll is a leading marketing technology company that empowers businesses to drive sustainable growth while building trusted connections with their audiences.” Source: RevenueBase Database · checked Sep 21, 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: marketing automation software for B2B 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 marketing automation software for B2B companies.
Partial evidence: Its own public description names part of marketing automation software for B2B companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name marketing automation software for B2B 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 2,087 marketing automation software for B2B companies based in the United States

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

As of Sep 21, 2026

38.9%Verified-email coverage

26.7Average contacts per company

1-10Median size (employees)

4.9%Largest-city concentration · New York

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

1,234

11-50

585

51-200

180

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 2,087 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 marketing automation software for B2B 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 “marketing automation software for B2B 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 marketing automation software for B2B 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 marketing automation software for B2B 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, 21,692 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 21, 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.

Marketing automation software for B2B 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 marketing automation software for B2B 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 marketing automation software for B2B companies are there based in the United States?

RevenueBase identified 2,087 marketing automation software for B2B 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 marketing automation software for B2B companies?

New York leads with 103 headquartered companies, followed by San Francisco (95) and Austin (54).

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 21,692 verified decision-maker contacts tracked across these 2,087 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 21, 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.