Company lists · Data verified August 2026

Top 25 Cloud phone system companies based in the United States

Name: Cloud phone system 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 738 companies tracked

There are 738 cloud phone system companies headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 17,065 professional contacts across them, including 6,612 with verified work emails and 5,062 with mobile numbers. New York is the largest hub.

This list covers cloud phone system 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.

738Companies

17,065Contacts tracked

6,612Verified emails

5,062Mobile numbers

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The 25 largest cloud phone system companies based in the United States

Ranked by team size

Top 25 of 738 cloud phone system 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	Vonage	Holmdel, NJ	1,001-5,000	3,512	1,736
2	GOTO	Boston, MA	1,001-5,000	2,325	1,286
3	Intermedia Intelligent Communications	Sunnyvale, CA	1,001-5,000	1,251	672
4	Spectrumvoip	Plano, TX	201-500	425	167
5	phone.com	Poway, CA	201-500	396	52
6	Wildix	Columbus, OH	201-500	337	166
7	Ultatel	Herndon, VA	51-200	287	67
8	Broadsoft	Gaithersburg, MD	1,001-5,000	251	42
9	Vitel Global	South Plainfield, NJ	51-200	208	1
10	Voip Office	Troy, MI	201-500	165	39
11	Crexendo Business Solutions	Tempe, AZ	51-200	141	94
12	Panterra Networks	San Jose, CA	51-200	128	34
13	Estech Systems, Inc. ESI	Plano, TX	51-200	121	57
14	Star2star	Sarasota, FL	201-500	104	35
15	Euphoria Telecom	Sandton	51-200	90	56
16	Alliance Global Communications LLC	Plainsboro, NJ	51-200	90	10
17	NUSO	Clayton, MO	51-200	88	64
18	Netfortris, A Sangoma Company	Seattle, WA	201-500	75	45
19	Cloudli Communications	Newark, DE	51-200	74	62
20	Telecomp	Cushing, OK	51-200	74	48
21	Verve Cloud	San Diego, CA	51-200	64	34
22	Lightspeed Voice	North Venice, FL	51-200	62	50
23	Clarity Voice	Southfield, MI	51-200	59	42
24	Monmouth Telecom	Eatontown, NJ	51-200	54	3
25	West IP Communications	Louisville, KY	n/a	54	1

Showing 25 of 738 cloud phone system companies based in the United States

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Cloud phone system companies based in the United States at a glance

As of Aug 28, 2026

11-50Median size (employees)

New YorkLargest hub · 22 HQs

5,062Contacts with mobile numbers

31Emails re-verified in last 30 days

Companies by employee count

1-10

305

11-50

309

51-200

201-500

1,001-5,000

5,001-10,000

10001+

Cloud phone system companies by metro

Metro	Companies
Cloud phone system companies in New York	22
Cloud phone system companies in Miami	16
Cloud phone system companies in Austin	15
Cloud phone system companies in Tampa	14
Cloud phone system companies in Dallas	11
Cloud phone system companies in Houston	11
Cloud phone system companies in Los Angeles	9

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 “cloud phone system 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; 31 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 cloud phone system companies are there based in the United States?

There are 738 cloud phone system companies headquartered in the United States as of August 2026 (RevenueBase).

What is the largest company on this list?

Vonage, headquartered in Holmdel, tops this list with the largest team on record.

Which city has the most cloud phone system companies?

New York leads with 22 headquartered companies, followed by Miami (16) and Austin (15).

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 6,612 verified decision-maker contacts tracked across these 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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Related lists

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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.