Company lists · Data refreshed October 2026

Top 25 Communication apis software companies based in the United States

RevenueBase identified 92 company matches for communication apis software companies associated with the United States as of October 2026 and tracks 4,058 professional contacts across them, including 1,037 with verified work emails. San Francisco is the largest hub.

This list covers company matches for communication apis software companies associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Oct 19, 2026 How this list was built
92Companies
4,058Contacts tracked
1,037Verified emails
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The 25 largest communication apis software companies based in the United States

Ranked by team size
Top 25 of 92 company matches for communication apis software companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 19, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchSanta Clara, CA, United StatesHQ recorded Oct 19, 2026501-1,000542 contacts →

Exact match

“Agora (NASDAQ: API) is the global leader in real-time engagement, providing developers with simple, flexible, and powerful APIs to embed real-time conversational AI, voice, video…”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
2Exact matchRedmond, WA, United StatesHQ recorded Oct 19, 202610001+436 contacts →

Exact match

“The next generation of Skype from Microsoft gives you better ways to chat, call, and plan fun things to do with the people in your life every day.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
3Exact matchChicago, IL, United StatesHQ recorded Oct 19, 2026501-1,000312 contacts →

Exact match

“We've moved pages.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
4Exact matchParsippany, NJ, United StatesHQ recorded Oct 19, 2026201-500270 contacts →

Exact match

“A leading cloud-optimized solutions provider for real-time communications media, applications, and infrastructure.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
5Exact matchGaithersburg, MD, United StatesHQ recorded Oct 19, 20261,001-5,000246 contacts →

Exact match

“BroadSoft, now part of Cisco, is the leading provider of software and services that enable mobile, fixed-line and cable service providers to offer Unified Communications over…”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
6Exact matchBoulder, CO, United StatesHQ recorded Oct 19, 202651-200232 contacts →

Exact match

“Stream helps apps build real-time experiences that scale.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
7Exact matchSouth Plainfield, NJ, United StatesHQ recorded Oct 19, 202651-200205 contacts →

Exact match

“Communication is the backbone of every business.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
8Exact matchPalo Alto, CA, United StatesHQ recorded Oct 19, 2026201-500199 contacts →

Exact match

“Voximplant versatile cloud platform enables business to bring interaction to a different level.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
9Exact matchTempe, AZ, United StatesHQ recorded Oct 19, 2026201-500177 contacts →

Exact match

“Vertical Communications is a leading provider of communications platforms and applications that enable critical business workflows for enterprises across a variety of industries…”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
10Exact matchSan Jose, CA, United StatesHQ recorded Oct 19, 2026201-500114 contacts →

Exact match

“Kika's mission is to revolutionize how the world communicates and make it easier, faster, and more expressive.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
11Exact matchBirmingham, AL, United StatesHQ recorded Oct 19, 202611-5091 contacts →

Exact match

“Linq is the infrastructure to build AI agents in iMessage, covering a suite of enterprise-ready APIs for iMessage, SMS, RCS and voice channels, built for engineers and product…”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
12Exact matchDenver, CO, United StatesHQ recorded Oct 19, 202651-20088 contacts →

Exact match

“Finishing your product shouldn’t be harder than building it.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
13Exact matchHackensack, NJ, United StatesHQ recorded Oct 19, 2026201-50085 contacts →

Exact match

“Named a Leader and Visionary by Gartner, Vidyo has been awarded more than 170 video communications technology patents.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
14Exact matchGurnee, IL, United StatesHQ recorded Oct 19, 202651-20081 contacts →

Exact match

“Voxvalley is a pioneer in developing CPaaS,Omnichannel, VoIP softphone, sdks and SaaS-based products that are curated with extensive research on modern-day communication needs.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
15Exact matchSan Francisco, United StatesHQ recorded Oct 19, 202651-20065 contacts →

Exact match

“VideoSDK is providing end-to-end solutions in real-time communication technology.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
16Exact matchSunnyvale, CA, United StatesHQ recorded Oct 19, 202611-5058 contacts →

Exact match

“2600Hz modernizes the way businesses communicate with KAZOO-a cloud-based unified communications solution.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
17Exact matchWilmington, United StatesHQ recorded Oct 19, 202651-20047 contacts →

Exact match

“We exist to make global communication as simple as a single API call.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
18Exact matchRaleigh, NC, United StatesHQ recorded Oct 19, 202651-20044 contacts →

Exact match

“Commio’s cloud voice and text messaging API platform enables companies to deliver rich omnichannel customer conversations at scale.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
19Exact matchAppleton, WI, United StatesHQ recorded Oct 19, 2026201-50041 contacts →

Exact match

“14IP is a global software development and technology company specialising in telecommunications.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
20Exact matchSan Francisco, CA, United StatesHQ recorded Oct 19, 202651-20040 contacts →

Exact match

“Daily is a real-time voice, video, and AI platform for developers.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
21Exact matchSanta Barbara, CA, United StatesHQ recorded Oct 19, 202651-20037 contacts →

Exact match

“D2 is the market leader in software platforms that power IP communications equipment and mobile phone.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
22Exact matchHolmdel, NJ, United StatesHQ recorded Oct 19, 2026201-50036 contacts →

Exact match

“Nexmo is now part of Vonage.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
23Exact matchJamaica Plain, MA, United StatesHQ recorded Oct 19, 202611-5033 contacts →

Exact match

“WebRTC for LIVE STREAMING FOR *ANY* SCREEN Video is the preferred communication media for business today, and Web RTC is the critical element.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
24Exact matchNewport Beach, CA, United StatesHQ recorded Oct 19, 202651-20027 contacts →

Exact match

“We are a communications platform as a service (CPaaS) designed for the pros.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
25Exact matchSanta Clara, CA, United StatesHQ recorded Oct 19, 202651-20026 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase

Showing 25 of 92 communication apis software companies based in the United States

See the full list, filter by size, metro and specialty, and access 1,037 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Communication apis software companies based in the United States at a glance

As of Oct 19, 2026
25.6%Verified-email coverage
44.1Average contacts per company
11-50Median size (employees)
6.5%Largest-city concentration · San Francisco
Oct 19, 2026Page data refreshed

Companies by employee count

1-10
19
11-50
33
51-200
27
201-500
9
501-1,000
2
1,001-5,000
1
10001+
1

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 92 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United States whose business descriptions match “communication apis software companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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
Every displayed company carries at least one verified work email. RevenueBase tracks 1,037 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on October 19, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “communication apis software companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many communication apis software companies are there based in the United States?

RevenueBase identified 92 company matches for communication apis software companies associated with the United States as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

AGORA tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most communication apis software companies?

San Francisco leads with 6 company records, followed by Denver (4) and New York (3).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 1,037 professional contacts with verified work emails tracked across these 92 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 19, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 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 with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.