Company lists · Data verified August 2026

Top 25 Customer messaging platforms based in the United States

Name: Customer messaging 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 975 companies tracked

There are 975 customer messaging platforms headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 23,171 professional contacts across them, including 8,770 with verified work emails and 6,188 with mobile numbers. San Francisco is the largest hub.

This list covers customer messaging 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.

975Companies

23,171Contacts tracked

8,770Verified emails

6,188Mobile numbers

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The 25 largest customer messaging platforms based in the United States

Ranked by team size

Top 25 of 975 customer messaging 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	Dialpad	San Ramon, CA	1,001-5,000	1,463	840
3	Vendasta	Boston, MA	501-1,000	768	268
4	Moneypenny	Charleston, SC	1,001-5,000	538	190
5	Acoustic	Waltham, MA	501-1,000	532	360
6	Dotdigital	New York, NY	201-500	488	347
7	customer.io	Portland, OR	201-500	445	231
8	Inteliquent, A Sinch Company	Chicago, IL	501-1,000	326	147
9	Genesys Interactive Intelligence	Daly City, CA	1,001-5,000	276	84
10	Firstup	San Francisco, CA	201-500	270	163
11	Kustomer	New York, NY	201-500	263	128
12	USHUR	Santa Clara, CA	201-500	252	96
13	Netomi	San Mateo, CA	201-500	237	124
14	Sinch Messagemedia	Berkeley, CA	201-500	188	41
15	Solutions By Text	Dallas, TX	201-500	182	109
16	Drift, A Salesloft Company	Seattle, WA	501-1,000	168	15
17	Vcloud	Las Vegas	501-1,000	137	54
18	Noble Systems	Atlanta, GA	501-1,000	132	20
19	tawk.to	Las Vegas, NV	201-500	129	28
20	ROBBU	Sun Prairie, WI	201-500	107	59
21	Demandforce	San Francisco, CA	201-500	104	28
22	Ims, INC	Liverpool, NY	201-500	75	29
23	Sword Ciboodle	Sunnyvale, CA	501-1,000	74	1
24	acquire.io	San Francisco, CA	201-500	56	7
25	Justcall	Palo Alto, CA	201-500	52	14

Showing 25 of 975 customer messaging platforms based in the United States

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Customer messaging platforms based in the United States at a glance

As of Aug 28, 2026

11-50Median size (employees)

San FranciscoLargest hub · 68 HQs

6,188Contacts with mobile numbers

14Emails re-verified in last 30 days

Companies by employee count

1-10

408

11-50

377

51-200

133

201-500

501-1,000

1,001-5,000

10001+

Customer messaging platforms by metro

Metro	Companies
Customer messaging platforms in San Francisco	68
Customer messaging platforms in New York	65
Customer messaging platforms in Los Angeles	32
Customer messaging platforms in Miami	25
Customer messaging platforms in Atlanta	21
Customer messaging platforms in Wilmington	20
Customer messaging platforms in Sheridan	19

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 messaging 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; 14 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 messaging platforms are there based in the United States?

There are 975 customer messaging 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 messaging platforms?

San Francisco leads with 68 headquartered companies, followed by New York (65) and Los Angeles (32).

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 8,770 verified decision-maker contacts tracked across these 975 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 messaging 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.