Company lists · Data verified August 2026

Top 25 Enterprise communication platform providers based in the United States

Name: Enterprise communication platform providers 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 314 companies tracked

There are 314 enterprise communication platform providers headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 26,743 professional contacts across them, including 7,778 with verified work emails and 6,643 with mobile numbers. San Francisco is the largest hub.

This list covers enterprise communication platform providers 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.

314Companies

26,743Contacts tracked

7,778Verified emails

6,643Mobile numbers

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The 25 largest enterprise communication platform providers based in the United States

Ranked by team size

Top 25 of 314 enterprise communication platform providers 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	ZOOM	Overland Park, KS	5,001-10,000	9,821	3,598
2	SLACK	San Francisco, CA	1,001-5,000	2,591	4
3	GOTO	Boston, MA	1,001-5,000	2,325	1,286
4	Polycom	Andover, MA	1,001-5,000	1,783	64
5	Intermedia Intelligent Communications	Sunnyvale, CA	1,001-5,000	1,251	672
6	Ooma, INC	Sunnyvale, CA	501-1,000	604	286
7	SKYPE	Redmond, WA	10001+	437	64
8	phone.com	Poway, CA	201-500	396	52
9	Wildix	Columbus, OH	201-500	337	166
10	GPA	Glen Ellyn, IL	5,001-10,000	317	11
11	ZOOM	San Jose, CA	5,001-10,000	288	184
12	Bluejeans By Verizon	San Jose, CA	501-1,000	266	6
13	Broadsoft	Gaithersburg, MD	1,001-5,000	251	42
14	Vitel Global	South Plainfield, NJ	51-200	208	1
15	Voximplant	Palo Alto, CA	201-500	192	87
16	rocket.chat	Wilmington, DE	51-200	189	68
17	Vertical Communications	Tempe, AZ	201-500	174	69
18	Jive Software	Austin, TX	501-1,000	165	1
19	Mattermost	Palo Alto, CA	51-200	149	104
20	LOOM	San Francisco, CA	51-200	143	40
21	Smash Solutions	South Jordan, UT	51-200	141	2
22	Convex Interactive	Houston, TX	51-200	140	49
23	OWL Labs	Boston, MA	51-200	131	102
24	Panterra Networks	San Jose, CA	51-200	128	34
25	Lifesize	Austin, TX	201-500	122	13

Showing 25 of 314 enterprise communication platform providers based in the United States

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Enterprise communication platform providers based in the United States at a glance

As of Aug 28, 2026

11-50Median size (employees)

San FranciscoLargest hub · 14 HQs

6,643Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

124

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Enterprise communication platform providers by metro

Metro	Companies
Enterprise communication platform providers in San Francisco	14
Enterprise communication platform providers in Austin	12
Enterprise communication platform providers in Wilmington	9
Enterprise communication platform providers in New York	8
Enterprise communication platform providers in Sunnyvale	7
Enterprise communication platform providers in San Jose	6
Enterprise communication platform providers in Miami	6

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 “enterprise communication platform providers”, 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; 0 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 enterprise communication platform providers are there based in the United States?

There are 314 enterprise communication platform providers headquartered in the United States as of August 2026 (RevenueBase).

What is the largest company on this list?

ZOOM, headquartered in Overland Park, tops this list with the largest team on record.

Which city has the most enterprise communication platform providers?

San Francisco leads with 14 headquartered companies, followed by Austin (12) and Wilmington (9).

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 7,778 verified decision-maker contacts tracked across these 314 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.