Company lists · Data refreshed September 2026

Top 25 Telephony integration software providers worldwide

Name: Telephony integration software providers worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 1,412 companies tracked

RevenueBase identified 1,412 telephony integration software providers worldwide as of September 2026 and tracks 23,625 professional contacts across them, including 7,443 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers telephony integration software providers worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 29, 2026. Country and city lists for telephony integration software providers follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 29, 2026 86% judged on-target in blind review

1,412Companies

23,625Contacts tracked

7,443Verified emails

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The 25 largest telephony integration software providers worldwide

Ranked by team size

Top 25 of 1,412 telephony integration software providers worldwide, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to telephony integration software providers: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Ringcentral	Indirect evidence	Belmont, CA, United StatesHQ checked Sep 29, 2026	5,001-10,000	6,431 contacts →
	Indirect evidence “RingCentral, Inc.(NYSE: RNG) is a global leader in AI–powered customer engagement, delivering an integrated platform for business phone, SMS, contact center, workforce engagement…” Source: RevenueBase Database · checked Sep 29, 2026
2	Deepija Telecom PVT LTD	Indirect evidence	Hyderabad, IndiaHQ checked Sep 29, 2026	201-500	527 contacts →
	Indirect evidence “Telecom Applications are one of the fastest-changing technologies of today.” Source: RevenueBase Database · checked Sep 29, 2026
3	Stelogy	Partial evidence	Paris, FranceHQ checked Sep 29, 2026	501-1,000	403 contacts →
	Partial evidence “VoIP/ToIP services Operator and Integrator Telephony solutions for small and medium-sized enterprises.” Source: RevenueBase Database · checked Sep 29, 2026
4	Soitron	Indirect evidence	Bratislava, SlovakiaHQ checked Sep 29, 2026	501-1,000	363 contacts →
	Indirect evidence “One of the leading systems integrators in the European market today.” Source: RevenueBase Database · checked Sep 29, 2026
5	Handphone Telecomunicações	Indirect evidence	Osasco, BrazilHQ checked Sep 29, 2026	201-500	273 contacts →
	Indirect evidence “A Handphone Telecomunicações é uma indústria, fabricante de equipamentos para Telecomunicações, tais como sistemas PABX de pequeno, médio e grande porte, sistemas Call Center's…” Source: RevenueBase Database · checked Sep 29, 2026
6	Mmdsmart	Indirect evidence	Petah Tikva, IsraelHQ checked Sep 29, 2026	201-500	217 contacts →
	Indirect evidence “MMDSmart is a leading provider of enterprise cloud-based communication solutions, helping organizations engage customers across the entire customer lifecycle.” Source: RevenueBase Database · checked Sep 29, 2026
7	Vail Systems	Partial evidence	Chicago, IL, United StatesHQ checked Sep 29, 2026	51-200	214 contacts →
	Partial evidence “For over thirty years, Fortune 500 companies in financial services, retail and hospitality, software, and wireless communications industries have relied on Vail Systems’…” Source: RevenueBase Database · checked Sep 29, 2026
8	KHOMP	Partial evidence	Florianópolis, BrazilHQ checked Sep 29, 2026	201-500	207 contacts →
	Partial evidence “Khomp is a Brazilian company, based in Santa Catarina, which provides leading edge technology for the development of convergence solutions between computer and telephony, in the…” Source: RevenueBase Database · checked Sep 29, 2026
9	Forerunner Technologies, INC	Indirect evidence	Edgewood, NY, United StatesHQ checked Sep 29, 2026	51-200	184 contacts →
	Indirect evidence “Established in 1988, Forerunner Technologies, Inc.” Source: RevenueBase Database · checked Sep 29, 2026
10	Even Media Interactive	Partial evidence	Marseille, FranceHQ checked Sep 29, 2026	201-500	179 contacts →
	Partial evidence “EVEN MEDIA INTERACTIVE is a computer software company based out of 12 BOULEVARD D ATHENES, MARSEILLE, France.” Source: RevenueBase Database · checked Sep 29, 2026
11	3cx	Indirect evidence	Nicosia, CyprusHQ checked Sep 29, 2026	51-200	154 contacts →
	Indirect evidence “3CX is the developer of an open standards communications solution which innovates business connectivity and collaboration, replacing proprietary PBXs.” Source: RevenueBase Database · checked Sep 29, 2026
12	In-Telecom	Indirect evidence	Slidell, LA, United StatesHQ checked Sep 29, 2026	51-200	151 contacts →
	Indirect evidence “In-Telecom offers a full spectrum of solutions such as VoIP phones, access control, unparalleled customer service, IT consulting, and quality workmanship from our experienced…” Source: RevenueBase Database · checked Sep 29, 2026
13	DRD Communications & Software Pvt. LTD	Partial evidence	Cochin, IndiaHQ checked Sep 29, 2026	501-1,000	142 contacts →
	Partial evidence “DRD Communications & Software Private Limited is a subsidiary of DRD Communications Ltd, UK to provide software development and support services to telecom billing.” Source: RevenueBase Database · checked Sep 29, 2026
14	Appitsimple Infotek Pvt. LTD	Indirect evidence	Sarkhej, IndiaHQ checked Sep 29, 2026	51-200	139 contacts →
	Indirect evidence “AppitSimple Infotek Pvt Ltd - A Pioneer product-based IT company that has been revolutionizing & simplifying the way organizations do business since the last many years.” Source: RevenueBase Database · checked Sep 29, 2026
15	Unimax	Indirect evidence	Minneapolis, MN, United StatesHQ checked Sep 29, 2026	51-200	133 contacts →
	Indirect evidence “Unimax believes that administering PBX and voice messaging systems can be far less complex and costly, while delivering better service levels.” Source: RevenueBase Database · checked Sep 29, 2026
16	ZIWO	Partial evidence	Dubai, United Arab EmiratesHQ checked Sep 29, 2026	51-200	127 contacts →
	Partial evidence “ZIWO is Cloud Contact Center Software (CCAAS) that provides a straightforward solution for companies to talk to their clients with a crystal-clear voice.” Source: RevenueBase Database · checked Sep 29, 2026
17	Amtelco	Partial evidence	Mcfarland, WI, United StatesHQ checked Sep 29, 2026	51-200	118 contacts →
	Partial evidence “Amtelco has been a family-owned communication software company since 1976 and devoted to providing secure, stable, and critical communication solutions for healthcare, contact…” Source: RevenueBase Database · checked Sep 29, 2026
18	Imagicle	Indirect evidence	Massarosa, ItalyHQ checked Sep 29, 2026	51-200	115 contacts →
	Indirect evidence “Imagicle is a Zucchetti Group company (founded 2010) with 130+ people across 7 offices in Italy, France, the United States, and the Middle East.” Source: RevenueBase Database · checked Sep 29, 2026
19	Openphone	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 29, 2026	51-200	103 contacts →
	Indirect evidence “OpenPhone (now Quo) is the collaborative phone system trusted by teams at over 90k businesses.” Source: RevenueBase Database · checked Sep 29, 2026
20	Cube Software Private Limited Cspl	Partial evidence	Noida, IndiaHQ checked Sep 29, 2026	51-200	101 contacts →
	Partial evidence “Welcome to Cube Software Private Limited, it was established in 1991 with expertise in CTI and other software development streams, hardware design & development, and…” Source: RevenueBase Database · checked Sep 29, 2026
21	Nuxiba Latam	Partial evidence	Benito Juarez, MexicoHQ checked Sep 29, 2026	51-200	101 contacts →
	Partial evidence “Nuxiba has over 25 years of experience in engineering software for improving the operation of hundreds of contact centers around the world.” Source: RevenueBase Database · checked Sep 29, 2026
22	Innovaphone	Partial evidence	Sindelfingen, GermanyHQ checked Sep 29, 2026	51-200	96 contacts →
	Partial evidence “innovaphone has been playing a decisive role in driving the development of IP telephony and digital transformation for more than 25 years now and is a leading European provider of…” Source: RevenueBase Database · checked Sep 29, 2026
23	Alliance Global Communications LLC	Indirect evidence	Plainsboro, NJ, United StatesHQ checked Sep 29, 2026	51-200	91 contacts →
	Indirect evidence “Alliance Global is a cloud-based business phone system provider exclusively for organizations that require professional communication features.” Source: RevenueBase Database · checked Sep 29, 2026
24	Bicom Systems	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	90 contacts →
	Partial evidence “Made for businesses of all sizes, Bicom Systems revolutionizes communications by providing PBXware, the world's most unified turnkey open standards hosted telephony platform, plus…” Source: RevenueBase Database · checked Sep 29, 2026
25	AMC Technology	Partial evidence	Richmond, VA, United StatesHQ checked Sep 29, 2026	11-50	90 contacts →
	Partial evidence “AMC Technology is a services-led contact center integration company with over 30 years of hands-on expertise.” Source: RevenueBase Database · checked Sep 29, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: telephony integration software providers. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names telephony integration software providers.
Partial evidence: Its own public description names part of telephony integration software providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name telephony integration software providers. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 1,412 telephony integration software providers worldwide

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Telephony integration software providers worldwide at a glance

As of Sep 29, 2026

31.5%Verified-email coverage

16.7Average contacts per company

11-50Median size (employees)

2.7%Largest-city concentration · Sao Paulo

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

627

11-50

584

51-200

163

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among telephony integration software providers, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for telephony integration software providers are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “telephony integration software providers”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names telephony integration software providers), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among telephony integration software providers, and records with no verified work email.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 7,443 across the full list. 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 September 29, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Telephony integration software providers by location

11 lists · largest first

Every Telephony integration software providers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names telephony integration software providers, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many telephony integration software providers are there worldwide?

RevenueBase identified 1,412 telephony integration software providers worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Ringcentral, headquartered in Belmont, tops this list with the largest team on record.

Which country has the most telephony integration software providers?

The United States leads with 208 companies, followed by Brazil (148) and India (92). Every telephony integration software providers list by country and city is linked on this page.

Which city has the most telephony integration software providers?

Sao Paulo leads with 38 headquartered companies, followed by London (17) and Paris (16).

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 7,443 verified decision-maker contacts tracked across these 1,412 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 29, 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 Smart Search, 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.