Company lists · Data verified August 2026

Top 25 Customer engagement software companies based in the United States

Name: Customer engagement software 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 668 companies tracked

There are 668 customer engagement software companies headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 20,163 professional contacts across them, including 7,899 with verified work emails and 5,781 with mobile numbers. New York is the largest hub.

This list covers customer engagement software 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.

668Companies

20,163Contacts tracked

7,899Verified emails

5,781Mobile numbers

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

Ranked by team size

Top 25 of 668 customer engagement software 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	Klaviyo	Boston, MA	1,001-5,000	2,859	1,624
2	Marigold	Nashville, TN	201-500	818	147
3	Vendasta	Boston, MA	501-1,000	768	268
4	Applovin	Palo Alto, CA	201-500	753	245
5	Bond Brand Loyalty	Denver, CO	501-1,000	610	288
6	Adobe Marketo	Atlanta, GA	1,001-5,000	570	109
7	Acoustic	Waltham, MA	501-1,000	532	360
8	Dotdigital	New York, NY	201-500	488	347
9	Spectrio	Tampa, FL	201-500	466	313
10	Branch	Mountain View, CA	201-500	456	286
11	customer.io	Portland, OR	201-500	445	231
12	DOXIM	New York	501-1,000	433	251
13	Resulticks	New York, NY	201-500	362	37
14	Callrail	Atlanta, GA	201-500	330	215
15	Higher Logic	Arlington, VA	201-500	302	197
16	Paytronix	Newton, MA	201-500	270	181
17	Total Expert	St. Louis Park, MN	201-500	233	167
18	Tacton	Chicago, IL	201-500	231	158
19	Gladly	San Francisco, CA	201-500	218	152
20	Annex Cloud	Mclean, VA	51-200	212	121
21	Rosetta	El Segundo, CA	1,001-5,000	212	7
22	Remarkable AI	New York, NY	51-200	195	18
23	Outboundengine	Seattle, WA	201-500	183	8
24	Sendpulse	New York	51-200	181	74
25	Servixer, LLC	Sheridan, WY	501-1,000	161	2

Showing 25 of 668 customer engagement software companies based in the United States

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

As of Aug 28, 2026

11-50Median size (employees)

New YorkLargest hub · 51 HQs

5,781Contacts with mobile numbers

16Emails re-verified in last 30 days

Companies by employee count

1-10

286

11-50

246

51-200

201-500

501-1,000

1,001-5,000

10001+

Customer engagement software companies by metro

Metro	Companies
Customer engagement software companies in New York	51
Customer engagement software companies in San Francisco	45
Customer engagement software companies in Austin	22
Customer engagement software companies in Miami	20
Customer engagement software companies in Boston	19
Customer engagement software companies in Los Angeles	18
Customer engagement software companies in Seattle	13

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 software 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; 16 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 software companies are there based in the United States?

There are 668 customer engagement software companies 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 software companies?

New York leads with 51 headquartered companies, followed by San Francisco (45) and Austin (22).

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 7,899 verified decision-maker contacts tracked across these 668 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.