Company lists · Data verified August 2026

Top 25 Business communication platforms based in the United States

Name: Business communication 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 392 companies tracked

There are 392 business communication platforms headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 28,909 professional contacts across them, including 7,990 with verified work emails and 7,097 with mobile numbers. San Francisco is the largest hub.

This list covers business communication 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.

392Companies

28,909Contacts tracked

7,990Verified emails

7,097Mobile numbers

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The 25 largest business communication platforms based in the United States

Ranked by team size

Top 25 of 392 business communication 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	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	Anywhereworks	Raleigh, NC	1,001-5,000	1,100	38
7	Ooma, INC	Sunnyvale, CA	501-1,000	604	286
8	SKYPE	Redmond, WA	10001+	437	64
9	phone.com	Poway, CA	201-500	396	52
10	Wildix	Columbus, OH	201-500	337	166
11	GPA	Glen Ellyn, IL	5,001-10,000	317	11
12	ZOOM	San Jose, CA	5,001-10,000	288	184
13	Bluejeans By Verizon	San Jose, CA	501-1,000	266	6
14	Infocus	Portland, OR	51-200	257	12
15	Broadsoft	Gaithersburg, MD	1,001-5,000	251	42
16	Movius	Alpharetta, GA	51-200	242	105
17	Whitlock	Virginia Beach, VA	1,001-5,000	225	55
18	Vitel Global	South Plainfield, NJ	51-200	208	1
19	Voximplant	Palo Alto, CA	201-500	192	87
20	Vertical Communications	Tempe, AZ	201-500	174	69
21	Jive Software	Austin, TX	501-1,000	165	1
22	Mattermost	Palo Alto, CA	51-200	149	104
23	LOOM	San Francisco, CA	51-200	143	40
24	Smash Solutions	South Jordan, UT	51-200	141	2
25	OWL Labs	Boston, MA	51-200	131	102

Showing 25 of 392 business communication platforms based in the United States

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Business communication platforms based in the United States at a glance

As of Aug 28, 2026

11-50Median size (employees)

San FranciscoLargest hub · 20 HQs

7,097Contacts with mobile numbers

34Emails re-verified in last 30 days

Companies by employee count

1-10

127

11-50

157

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Business communication platforms by metro

Metro	Companies
Business communication platforms in San Francisco	20
Business communication platforms in New York	13
Business communication platforms in Miami	11
Business communication platforms in Austin	11
Business communication platforms in Wilmington	8
Business communication platforms in Palo Alto	7
Business communication platforms in San Jose	7

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 “business communication 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; 34 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 business communication platforms are there based in the United States?

There are 392 business communication platforms 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 business communication platforms?

San Francisco leads with 20 headquartered companies, followed by New York (13) and Miami (11).

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 7,990 verified decision-maker contacts tracked across these 392 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.