Company lists · Data verified August 2026

Top 25 Marketing automation platforms based in the United States

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 1,810 companies tracked

There are 1,810 marketing automation platforms headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 33,591 professional contacts across them, including 11,659 with verified work emails and 9,827 with mobile numbers. New York is the largest hub.

This list covers marketing automation 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. Data current as of August 28, 2026.

1,810Companies

33,591Contacts tracked

11,659Verified emails

9,827Mobile numbers

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The 25 largest marketing automation platforms based in the United States

Ranked by team size

Top 25 of 1,810 marketing automation platforms based in the United States, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Klaviyo	Boston, MA	1,001-5,000	2,859	1,624
2	Zeta Global	Nashville, TN	1,001-5,000	2,570	1,644
3	Intuit Mailchimp	Oakland, CA	1,001-5,000	1,557	474
4	Demandscience	Boston	1,001-5,000	1,080	423
5	Activecampaign	Chicago, IL	1,001-5,000	852	581
6	Marigold	Nashville, TN	201-500	818	147
7	Vendasta	Boston, MA	501-1,000	768	268
8	simpli.fi	Fort Worth, TX	501-1,000	677	470
9	Movable INK	Chicago, IL	501-1,000	667	406
10	Optimove	New York, NY	501-1,000	577	88
11	Adobe Marketo	Atlanta, GA	1,001-5,000	570	109
12	Treasure AI	New York, NY	501-1,000	503	76
13	HCL Unica	Sunnyvale, CA	10001+	380	8
14	Hightouch	San Francisco, CA	201-500	354	68
15	Validity INC	Tampa, FL	201-500	349	229
16	Soci, INC	San Diego, CA	501-1,000	339	205
17	Callrail	Atlanta, GA	201-500	330	215
18	Listrak	Lititz, PA	201-500	298	173
19	Claritas	Cincinnati, OH	201-500	295	166
20	Tangence	San Jose, CA	201-500	205	47
21	KEAP	Chandler, AZ	201-500	200	58
22	Outboundengine	Seattle, WA	201-500	183	8
23	Sendpulse	New York	51-200	181	74
24	Tapclicks	San Jose, CA	51-200	168	91
25	Stirista	San Antonio, TX	51-200	163	113

Showing 25 of 1,810 marketing automation platforms based in the United States

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Marketing automation platforms based in the United States at a glance

As of Aug 28, 2026

1-10Median size (employees)

New YorkLargest hub · 95 HQs

9,827Contacts with mobile numbers

88Emails re-verified in last 30 days

Companies by employee count

1-10

1,122

11-50

486

51-200

137

201-500

501-1,000

1,001-5,000

10001+

Marketing automation platforms by metro

Metro	Companies
Marketing automation platforms in New York	95
Marketing automation platforms in San Francisco	79
Marketing automation platforms in Austin	48
Marketing automation platforms in Los Angeles	48
Marketing automation platforms in Miami	37
Marketing automation platforms in Chicago	34
Marketing automation platforms in Atlanta	32

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “marketing automation platforms”, with match quality audited by blind human judging, and headquartered in the United States.
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: Contact records re-verify on a rolling cadence; 88 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many marketing automation platforms are there based in the United States?

There are 1,810 marketing automation platforms headquartered in the United States as of August 2026 (RevenueBase).

What is the largest company on this list?

Klaviyo, headquartered in Boston, tops this list with the largest team on record.

Which city has the most marketing automation platforms?

New York leads with 95 headquartered companies, followed by San Francisco (79) and Austin (48).

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 11,659 verified decision-maker contacts tracked across these 1,810 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.