Company lists · Data verified August 2026

Top 25 Customer engagement platform companies based in the United States

Name: Customer engagement platform companies 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 1,738 companies tracked

There are 1,738 customer engagement platform companies headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 60,811 professional contacts across them, including 23,649 with verified work emails and 17,885 with mobile numbers. New York is the largest hub.

This list covers customer engagement platform 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. Data current as of August 28, 2026.

1,738Companies

60,811Contacts tracked

23,649Verified emails

17,885Mobile numbers

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The 25 largest customer engagement platform companies based in the United States

Ranked by team size

Top 25 of 1,738 customer engagement platform companies 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	CSG	Fort Worth, TX	5,001-10,000	5,915	2,785
2	Klaviyo	Boston, MA	1,001-5,000	2,859	1,624
3	THRYV	Dallas, TX	1,001-5,000	2,430	781
4	Sitecore	Manchester, NH	1,001-5,000	1,765	771
5	Intuit Mailchimp	Oakland, CA	1,001-5,000	1,557	474
6	Podium	Lehi, UT	1,001-5,000	1,453	538
7	6sense	New York	1,001-5,000	1,426	848
8	Demandscience	Boston	1,001-5,000	1,080	423
9	Activecampaign	Chicago, IL	1,001-5,000	852	581
10	Vendasta	Boston, MA	501-1,000	768	268
11	Movable INK	Chicago, IL	501-1,000	667	406
12	Bond Brand Loyalty	Denver, CO	501-1,000	610	288
13	PIANO	Philadelphia, PA	501-1,000	603	259
14	Adobe Marketo	Atlanta, GA	1,001-5,000	570	109
15	Analytic Partners	Miami, FL	501-1,000	561	345
16	Moneypenny	Charleston, SC	1,001-5,000	538	190
17	Acoustic	Waltham, MA	501-1,000	532	360
18	Treasure AI	New York, NY	501-1,000	503	76
19	Team Velocity	Herndon, VA	501-1,000	459	332
20	DOXIM	New York	501-1,000	433	251
21	Liquidhub	Wayne, PA	1,001-5,000	429	108
22	HCL Unica	Sunnyvale, CA	10001+	380	8
23	CSLLC	Springfield, MO	1,001-5,000	326	15
24	Aspen Marketing	Irving, TX	5,001-10,000	281	54
25	Genesys Interactive Intelligence	Daly City, CA	1,001-5,000	276	84

Showing 25 of 1,738 customer engagement platform companies based in the United States

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Customer engagement platform companies based in the United States at a glance

As of Aug 28, 2026

11-50Median size (employees)

New YorkLargest hub · 157 HQs

17,885Contacts with mobile numbers

43Emails re-verified in last 30 days

Companies by employee count

1-10

746

11-50

631

51-200

251

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Customer engagement platform companies by metro

Metro	Companies
Customer engagement platform companies in New York	157
Customer engagement platform companies in San Francisco	98
Customer engagement platform companies in Boston	42
Customer engagement platform companies in Miami	41
Customer engagement platform companies in Austin	40
Customer engagement platform companies in Los Angeles	39
Customer engagement platform companies in Atlanta	39

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 platform companies”, 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; 43 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 platform companies are there based in the United States?

There are 1,738 customer engagement platform companies headquartered in the United States as of August 2026 (RevenueBase).

What is the largest company on this list?

CSG, headquartered in Fort Worth, tops this list with the largest team on record.

Which city has the most customer engagement platform companies?

New York leads with 157 headquartered companies, followed by San Francisco (98) and Boston (42).

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 23,649 verified decision-maker contacts tracked across these 1,738 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.