Company lists · Data refreshed September 2026

Top 25 Marketing automation software developers based in the United States

Name: Marketing automation software developers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 1,151 companies tracked

RevenueBase identified 1,151 marketing automation software developers headquartered in the United States as of September 2026 and tracks 37,191 professional contacts across them, including 16,172 with verified work emails and 10,899 with mobile numbers. New York is the largest hub.

This list covers marketing automation software developers 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 5, 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 5, 2026 86% judged on-target in blind review

1,151Companies

37,191Contacts tracked

16,172Verified emails

10,899Mobile numbers

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest marketing automation software developers based in the United States

Ranked by team size

Top 25 of 1,151 marketing automation software developers based in the United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. RevenueBase Smart Search rates how each company's information relates to marketing automation software developers: 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 5, 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 5, 2026
2	Klaviyo	Indirect evidence	Boston, MA, United StatesHQ checked Sep 5, 2026	1,001-5,000	2,789 contacts →
	Indirect evidence “Klaviyo (NYSE: KVYO) is the autonomous B2C CRM.” Source: RevenueBase Database · checked Sep 5, 2026
3	BRAZE	Indirect evidence	New York, NY, United StatesHQ checked Sep 5, 2026	1,001-5,000	2,142 contacts →
	Indirect 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 5, 2026
4	Intuit Mailchimp	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 5, 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 5, 2026
5	Centro	Strong evidence	Chicago, IL, United StatesHQ checked Sep 5, 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 5, 2026
6	Moengage	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 5, 2026	501-1,000	908 contacts →
	Indirect evidence “MoEngage is an agentic customer engagement platform for the customer-obsessed marketers and product owners.” Source: RevenueBase Database · checked Sep 5, 2026
7	Activecampaign	Partial evidence	Chicago, IL, United StatesHQ checked Sep 5, 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 5, 2026
8	Marigold	Partial evidence	Nashville, TN, United StatesHQ checked Sep 5, 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 5, 2026
9	simpli.fi	Indirect evidence	Fort Worth, TX, United StatesHQ checked Sep 5, 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 5, 2026
10	Optimove	Partial evidence	New York, NY, United StatesHQ checked Sep 5, 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 5, 2026
11	Adobe Marketo	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 5, 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 5, 2026
12	HCL Unica	Strong evidence	Sunnyvale, CA, United StatesHQ checked Sep 5, 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 5, 2026
13	Hightouch	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 5, 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 5, 2026
14	Listrak	Strong evidence	Lititz, PA, United StatesHQ checked Sep 5, 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 5, 2026
15	Warrior Plus	Strong evidence	Henderson, NV, United StatesHQ checked Sep 5, 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 5, 2026
16	WEB Spiders	Strong evidence	San Jose, CA, United StatesHQ checked Sep 5, 2026	201-500	250 contacts →
	Strong evidence “Web Spiders (WS) is an enterprise software company that develops products for marketing and HR.” Source: RevenueBase Database · checked Sep 5, 2026
17	Position	Indirect evidence	Santa Clara, CA, United StatesHQ checked Sep 5, 2026	51-200	225 contacts →
	Indirect evidence “Position² is a fast-growing Demand Generation company, venture backed by Accel Partners.” Source: RevenueBase Database · checked Sep 5, 2026
18	Act-On Software	Strong evidence	Portland, OR, United StatesHQ checked Sep 5, 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 5, 2026
19	Tangence	Partial evidence	San Jose, CA, United StatesHQ checked Sep 5, 2026	201-500	205 contacts →
	Partial evidence “Tangence accelerates marketing execution for companies more efficiently than in-house teams or other agencies.” Source: RevenueBase Database · checked Sep 5, 2026
20	KEAP	Indirect evidence	Chandler, AZ, United StatesHQ checked Sep 5, 2026	201-500	192 contacts →
	Indirect evidence “With Keap, you'll easily capture, organize, track, and nurture all of your leads to increase sales and revenue.” Source: RevenueBase Database · checked Sep 5, 2026
21	Outboundengine	Partial evidence	Seattle, WA, United StatesHQ checked Sep 5, 2026	201-500	181 contacts →
	Partial evidence “We believe every business deserves great marketing.” Source: RevenueBase Database · checked Sep 5, 2026
22	Sendpulse	Partial evidence	New York, United StatesHQ checked Sep 5, 2026	51-200	180 contacts →
	Partial evidence “SendPulse is an AI-driven marketing platform that helps scaling businesses automate email and chatbot conversations.” Source: RevenueBase Database · checked Sep 5, 2026
23	Stirista	Indirect evidence	San Antonio, TX, United StatesHQ checked Sep 5, 2026	51-200	163 contacts →
	Indirect 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 5, 2026
24	Rightwave	Strong evidence	San Jose, CA, United StatesHQ checked Sep 5, 2026	51-200	159 contacts →
	Strong evidence “RightWave provides Marketing Automation Services for B2B companies.” Source: RevenueBase Database · checked Sep 5, 2026
25	Icontact	Indirect evidence	Morrisville, NC, United StatesHQ checked Sep 5, 2026	51-200	137 contacts →
	Indirect evidence “We believe powerful connections propel business growth.” Source: RevenueBase Database · checked Sep 5, 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 developers. 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 developers.
Partial evidence: Its own public description names part of marketing automation software developers, 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 developers. 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 1,151 marketing automation software developers based in the United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 16,172 reachable decision-makers.

Free signup · no credit card

View the full list →

Marketing automation software developers based in the United States at a glance

As of Sep 5, 2026

43.5%Verified-email coverage

29.3%Mobile-number coverage

32.3Average contacts per company

1-10Median size (employees)

4.5%Largest-city concentration · New York

Sep 5, 2026Page data refreshed

Companies by employee count

1-10

698

11-50

310

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

15,1750–30

85031–60

1761–90

1490–180

116180+

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 developers, 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 developers”. 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 developers), 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 developers, 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, 16,172 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 5, 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 developers 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 developers, 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 developers are there based in the United States?

RevenueBase identified 1,151 marketing automation software developers 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 developers?

New York leads with 52 headquartered companies, followed by San Francisco (48) and Los Angeles (31).

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 16,172 verified decision-maker contacts tracked across these 1,151 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 5, 2026.

Ready to reach these companies? Verified emails and direct dials for all 1,151 marketing automation software developers based in the United States. Start with a free account, no credit card.

Download this list →

Related lists

Marketing automation software developers by geography

Browse the directory

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.