Company lists · Data verified August 2026

Top 25 Employee communications software based in the United States

Name: Employee communications software 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 122 companies tracked

There are 122 employee communications software headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 5,428 professional contacts across them, including 1,050 with verified work emails and 1,821 with mobile numbers. San Francisco is the largest hub.

This list covers employee communications software 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.

122Companies

5,428Contacts tracked

1,050Verified emails

1,821Mobile numbers

Unlock all 122 companies Free account · no credit card · 2 minutes

The 25 largest employee communications software based in the United States

Ranked by team size

Top 25 of 122 employee communications software 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	SLACK	San Francisco, CA	1,001-5,000	2,591	4
2	Humand	San Francisco, CA	501-1,000	487	191
3	Workshop	Omaha, NE	51-200	426	92
4	Interact Software	Tulsa, OK	201-500	246	156
5	Nectar	Lehi, UT	51-200	221	43
6	BLINK	Boston, MA	51-200	152	97
7	ROI Communication	Scotts Valley, CA	51-200	89	63
8	Axios HQ	Arlington, VA	51-200	83	48
9	Amplispot	New York City, NY	51-200	79	12
10	Multimedia Plus	New York, NY	11-50	55	9
11	Axero Solutions	New York, NY	51-200	49	26
12	Politemail Software	Greenland, NH	11-50	43	33
13	Akumina	Nashua, NH	51-200	38	26
14	Haystack	Seattle, WA	51-200	38	15
15	Socialchorus	San Francisco, CA	51-200	36	2
16	Hubengage	Cambridge, MA	11-50	35	4
17	Team Engine	Boulder, CO	11-50	31	18
18	CERKL	Blue Ash, OH	51-200	30	17
19	Teleskope	Bethesda, MD	11-50	29	13
20	Netpresenter	Princeton, NJ	11-50	28	18
21	Pronto	Lehi, UT	11-50	28	15
22	Oneteam	New York	11-50	21	12
23	AIRBO	Venice, CA	11-50	19	12
24	Umanni	Fort Lauderdale, FL	11-50	19	9
25	Snapcomms	San Francisco, CA	51-200	18	3

Showing 25 of 122 employee communications software based in the United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 1,050 reachable decision-makers.

Free account · no credit card

See all 122 companies

Employee communications software based in the United States at a glance

As of Aug 28, 2026

11-50Median size (employees)

San FranciscoLargest hub · 14 HQs

1,821Contacts with mobile numbers

1Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

Employee communications software by metro

Metro	Companies
Employee communications software in San Francisco	14
Employee communications software in New York	12
Employee communications software in Chicago	4
Employee communications software in Palo Alto	3
Employee communications software in Atlanta	3
Employee communications software in Austin	3
Employee communications software in Reston	2

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 “employee communications software”, 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; 1 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 employee communications software are there based in the United States?

There are 122 employee communications software headquartered in the United States as of August 2026 (RevenueBase).

What is the largest company on this list?

SLACK, headquartered in San Francisco, tops this list with the largest team on record.

Which city has the most employee communications software?

San Francisco leads with 14 headquartered companies, followed by New York (12) and Chicago (4).

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 1,050 verified decision-maker contacts tracked across these 122 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.

Ready to reach these companies? Verified emails and direct dials for all 122 employee communications software based in the United States. Start with a free account, no credit card.

Get the full list

Related lists

Employee communications software by geography

Browse the directory

Browse: Companies home · All United States lists · All Employee communications software lists · New lists

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.