Company lists · Data verified August 2026

Top 25 Customer engagement platforms based in the United States

Name: Customer engagement 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 1,284 companies tracked

There are 1,284 customer engagement platforms headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 35,535 professional contacts across them, including 12,899 with verified work emails and 10,187 with mobile numbers. New York is the largest hub.

This list covers customer engagement 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.

1,284Companies

35,535Contacts tracked

12,899Verified emails

10,187Mobile numbers

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The 25 largest customer engagement platforms based in the United States

Ranked by team size

Top 25 of 1,284 customer engagement 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	Sitecore	Manchester, NH	1,001-5,000	1,765	771
3	Dialog Direct	Fort Worth, TX	10001+	1,136	43
4	Activecampaign	Chicago, IL	1,001-5,000	852	581
5	Marigold	Nashville, TN	201-500	818	147
6	Vendasta	Boston, MA	501-1,000	768	268
7	Applovin	Palo Alto, CA	201-500	753	245
8	Bond Brand Loyalty	Denver, CO	501-1,000	610	288
9	PIANO	Philadelphia, PA	501-1,000	603	259
10	Adobe Marketo	Atlanta, GA	1,001-5,000	570	109
11	Acoustic	Waltham, MA	501-1,000	532	360
12	Treasure AI	New York, NY	501-1,000	503	76
13	Dotdigital	New York, NY	201-500	488	347
14	YES Marketing	Louisville, CO	201-500	482	3
15	Spectrio	Tampa, FL	201-500	466	313
16	customer.io	Portland, OR	201-500	445	231
17	Liquidhub	Wayne, PA	1,001-5,000	429	108
18	Invoca	West Hollywood, CA	201-500	384	258
19	Resulticks	New York, NY	201-500	362	37
20	Callrail	Atlanta, GA	201-500	330	215
21	CSLLC	Springfield, MO	1,001-5,000	326	15
22	Loyalty Juggernaut	Palo Alto, CA	201-500	320	131
23	Higher Logic	Arlington, VA	201-500	302	197
24	Listrak	Lititz, PA	201-500	298	173
25	Claritas	Cincinnati, OH	201-500	295	166

Showing 25 of 1,284 customer engagement platforms based in the United States

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Customer engagement platforms based in the United States at a glance

As of Aug 28, 2026

11-50Median size (employees)

New YorkLargest hub · 114 HQs

10,187Contacts with mobile numbers

23Emails re-verified in last 30 days

Companies by employee count

1-10

554

11-50

483

51-200

173

201-500

501-1,000

1,001-5,000

10001+

Customer engagement platforms by metro

Metro	Companies
Customer engagement platforms in New York	114
Customer engagement platforms in San Francisco	76
Customer engagement platforms in Boston	34
Customer engagement platforms in Austin	33
Customer engagement platforms in Los Angeles	31
Customer engagement platforms in Miami	29
Customer engagement platforms in Seattle	27
Customer engagement platforms in Chicago	27

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 “customer engagement 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; 23 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 customer engagement platforms are there based in the United States?

There are 1,284 customer engagement 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 customer engagement platforms?

New York leads with 114 headquartered companies, followed by San Francisco (76) and Boston (34).

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 12,899 verified decision-maker contacts tracked across these 1,284 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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Related lists

Customer engagement platforms by geography

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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.