Company lists · Data refreshed September 2026

Top 25 Unified communications providers based in Germany

RevenueBase identified 103 company matches for unified communications providers associated with Germany as of September 2026 and tracks 3,605 professional contacts across them, including 919 with verified work emails. Berlin is the largest hub.

This list covers company matches for unified communications providers associated with Germany, 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 September 22, 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 Sep 22, 2026 How this list was built
103Companies
3,605Contacts tracked
919Verified emails
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The 25 largest unified communications providers based in Germany

Ranked by team size
Top 25 of 103 company matches for unified communications providers based in Germany, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 22, 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 matchMunich, GermanyHQ recorded Sep 22, 20265,001-10,0001,812 contacts →

Exact match

“Unify is now part of Mitel!”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
2Exact matchMunich, GermanyHQ recorded Sep 22, 2026201-500331 contacts →

Exact match

“Welcome to NFON’s Corporate Channel.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
3Exact matchMunich, GermanyHQ recorded Sep 22, 2026201-500329 contacts →

Exact match

“Digital transformation is changing processes and supply chains, products and companies, entire industries and markets.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
4Exact matchDüsseldorf, GermanyHQ recorded Sep 22, 2026201-500153 contacts →

Exact match

“Transform your business DeTeWe Communications have many years of experience in delivering tailored, integrated solutions for their clients internationally 365 days a year, 24…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
5Exact matchKarlsruhe, GermanyHQ recorded Sep 22, 202651-200119 contacts →

Exact match

“Mit unseren Businesskommunikationslösungen verbinden wir von STARFACE Menschen am digitalen Arbeitsplatz und gestalten ihre Kommunikation so einfach und digital wie möglich.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
6Exact matchSindelfingen, GermanyHQ recorded Sep 22, 202651-20096 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
7Exact match22529, GermanyHQ recorded Sep 22, 2026201-50086 contacts →

Exact match

“We are DEKOM – your global partner for hybrid collaboration and smart meeting solutions.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
8Exact matchBochum, GermanyHQ recorded Sep 22, 20261,001-5,00075 contacts →

Exact match

“Enreach ist ein europaweit führender Anbieter von Unified-Communications- und Cloud-Contact-Center-Lösungen.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
9Exact matchGermering, GermanyHQ recorded Sep 22, 202651-20066 contacts →

Exact match

“With over a million installed licenses, C4B Com For Business AG is a market leader in CTI and Unified Communications software.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
10Exact matchReinbek, GermanyHQ recorded Sep 22, 202651-20027 contacts →

Exact match

“Agiles Arbeiten.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
11Exact matchHamburg, GermanyHQ recorded Sep 22, 202651-20026 contacts →

Exact match

“SYNO steht für Synergien.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
12Exact matchDarmstadt, GermanyHQ recorded Sep 22, 202611-5024 contacts →

Exact match

“Cloud- und On-Premise-Lösungen - Technologie verwandelt Die toplink-Gruppe etwas genauer betrachtet: toplink GmbH - die Cloud Company Bereits 2005 vermarktet die toplink GmbH die…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
13Exact matchStolberg (rhld.), GermanyHQ recorded Sep 22, 202611-5022 contacts →

Exact match

“Herzlich Willkommen bei CASERIS!”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
14Exact matchBörwang, GermanyHQ recorded Sep 22, 202651-20021 contacts →

Exact match

“Die OFF Telekommunikation GmbH ist DER Partner für moderne Kommunikationslösungen.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
15Exact matchMunich, GermanyHQ recorded Sep 22, 202611-5017 contacts →

Exact match

“Vistafon is a consulting firm and solution provider for videoconferencing, collaboration tools and digital transformation headquartered in Munich.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
16Exact matchDortmund, GermanyHQ recorded Sep 22, 202611-5015 contacts →

Exact match

“eNgY SOLUTIONS is revolutionizing business communication.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
17Exact matchMünster, GermanyHQ recorded Sep 22, 202611-5013 contacts →

Exact match

“o-byte.com ist ein mittelständisches ITK-Systemhaus aus der Fahrradstadt Münster mit Standorten in Köln und Lüdenscheid.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
18Exact matchMünchen-unterföhring, GermanyHQ recorded Sep 22, 202611-5011 contacts →

Exact match

“Wir verbinden Menschen – ob Local oder Global Player, vom Start-up bis zum Großkonzern.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
19Exact matchWolfenbüttel, GermanyHQ recorded Sep 22, 20261-1011 contacts →

Exact match

“We at IANT are an integrator for VoIP/UC telephone systems, specialized in Open Standards technologies.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
20Exact matchNuremberg, GermanyHQ recorded Sep 22, 202611-5011 contacts →

Exact match

“Komjan Group is an owner-managed telecommunications and service company based in Nuremberg, Germany.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
21Exact matchErkrath-unterfeldhaus, GermanyHQ recorded Sep 22, 202651-20010 contacts →

Exact match

“Telefonanlagen, Cloud-Telefonie, ITK, Unify Office by RingCentral, Microsoft Teams, Atos Unify, Estos, Alcatel, Mitos, Innovaphone, Unified Communications, Kollaboration…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
22Exact matchInning Am Ammersee, GermanyHQ recorded Sep 22, 202611-508 contacts →

Exact match

“PMG Lösungen schaffen den Mehrwert, effizient zu sein und hörbar zu überzeugen.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
23Exact matchWürzburg, GermanyHQ recorded Sep 22, 202611-508 contacts →

Exact match

“IT-Systemhaus mit Herz - Netzwerk - IT - Kommunikation - Alarm - Video.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
24Exact matchLangenhagen, GermanyHQ recorded Sep 22, 202611-507 contacts →

Exact match

“Die Bedürfnisse unserer Kunden bei der Kommunikation haben wir immer im Blick.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
25Exact matchBerlin, GermanyHQ recorded Sep 22, 2026201-5007 contacts →

Exact match

“Radius Connect ist seit 20 Jahren auf dem deutschen Markt als Anbieter von Telekommunikationsprodukten und -diensten für Unternehmen aller führenden Netze und Anbieter tätig.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase

Showing 25 of 103 unified communications providers based in Germany

See the full list, filter by size, metro and specialty, and access 919 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Unified communications providers based in Germany at a glance

As of Sep 22, 2026
25.5%Verified-email coverage
35.0Average contacts per company
11-50Median size (employees)
7.8%Largest-city concentration · Berlin
Sep 22, 2026Page data refreshed

Companies by employee count

1-10
35
11-50
41
51-200
13
201-500
10
501-1,000
1
1,001-5,000
1
5,001-10,000
1

Email recency for this list is measured worldwide rather than for Germany, so it is reported there. Company counts and contact totals on this page are exact for Germany, over 103 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 Germany whose business descriptions match “unified communications providers” 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 919 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 September 22, 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 “unified communications providers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many unified communications providers are there based in Germany?

RevenueBase identified 103 company matches for unified communications providers associated with Germany as of September 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?

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

Which city has the most unified communications providers?

Berlin leads with 8 company records, followed by Munich (8) and Dusseldorf (4).

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 919 professional contacts with verified work emails tracked across these 103 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 September 22, 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.