Company lists · Data refreshed September 2026

Top 25 Enterprise communication solutions providers based in Germany

Name: Enterprise communication solutions providers based in Germany
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 172 companies tracked

RevenueBase identified 172 enterprise communication solutions providers headquartered in Germany as of September 2026 and tracks 2,371 professional contacts across them, including 1,134 with verified work emails. Berlin is the largest hub.

This list covers enterprise communication solutions providers headquartered in Germany, 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 28, 2026.

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 28, 2026 86% judged on-target in blind review

172Companies

2,371Contacts tracked

1,134Verified emails

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The 25 largest enterprise communication solutions providers based in Germany

Ranked by team size

Top 25 of 172 enterprise communication solutions providers based in Germany, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to enterprise communication solutions 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	Nfon AG	Indirect evidence	Munich, GermanyHQ checked Sep 28, 2026	201-500	331 contacts →
	Indirect evidence “Welcome to NFON’s Corporate Channel.” Source: RevenueBase Database · checked Sep 28, 2026
2	Retarus	Indirect evidence	München, GermanyHQ checked Sep 28, 2026	201-500	329 contacts →
	Indirect evidence “Digital transformation is changing processes and supply chains, products and companies, entire industries and markets.” Source: RevenueBase Database · checked Sep 28, 2026
3	Ostertag Detewe	Strong evidence	Düsseldorf, GermanyHQ checked Sep 28, 2026	201-500	153 contacts →
	Strong evidence “Transform your business DeTeWe Communications have many years of experience in delivering tailored, integrated solutions for their clients internationally 365 days a year, 24…” Source: RevenueBase Database · checked Sep 28, 2026
4	Starface Gmbh	Indirect evidence	Karlsruhe, GermanyHQ checked Sep 28, 2026	51-200	119 contacts →
	Indirect evidence “Mit unseren Businesskommunikationslösungen verbinden wir von STARFACE Menschen am digitalen Arbeitsplatz und gestalten ihre Kommunikation so einfach und digital wie möglich.” Source: RevenueBase Database · checked Sep 28, 2026
5	Innovaphone	Indirect evidence	Sindelfingen, GermanyHQ checked Sep 28, 2026	51-200	96 contacts →
	Indirect 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 28, 2026
6	Enreach DE	Partial evidence	Bochum, GermanyHQ checked Sep 28, 2026	1,001-5,000	75 contacts →
	Partial evidence “Enreach ist ein europaweit führender Anbieter von Unified-Communications- und Cloud-Contact-Center-Lösungen.” Source: RevenueBase Database · checked Sep 28, 2026
7	C4b COM For Business AG	Partial evidence	Germering, GermanyHQ checked Sep 28, 2026	51-200	66 contacts →
	Partial evidence “With over a million installed licenses, C4B Com For Business AG is a market leader in CTI and Unified Communications software.” Source: RevenueBase Database · checked Sep 28, 2026
8	Byon Gmbh	Indirect evidence	Frankfurt Am Main, GermanyHQ checked Sep 28, 2026	51-200	45 contacts →
	Indirect evidence “IT Managed Services und Cloud Telefonie 2006 wurde die byon gmbh mit Sitz in Frankfurt/Main gegründet.” Source: RevenueBase Database · checked Sep 28, 2026
9	Communicode Gmbh	Strong evidence	Essen, GermanyHQ checked Sep 28, 2026	51-200	42 contacts →
	Strong evidence “As an experienced e-business service provider, we support companies in optimizing all digital business and communications processes with integrated and future-proof solutions.” Source: RevenueBase Database · checked Sep 28, 2026
10	Integrated Worlds Gmbh	Partial evidence	Holzgerlingen, GermanyHQ checked Sep 28, 2026	51-200	38 contacts →
	Partial evidence “Since the Integrated World was founded in 1996 we see ourselves as pioneers for the electronic data communication.” Source: RevenueBase Database · checked Sep 28, 2026
11	Termath AG	Indirect evidence	Wolfsburg, GermanyHQ checked Sep 28, 2026	51-200	30 contacts →
	Indirect evidence “Die TERMATH AG liefert maßgeschneiderte Lösungen im Bereich Kommunikationssysteme, Netzwerksysteme und Sicherheitssysteme sowie Service für Gewerbe, Industrie- und Großkunden.” Source: RevenueBase Database · checked Sep 28, 2026
12	Bonamic Gmbh	Indirect evidence	Bochum, GermanyHQ checked Sep 28, 2026	11-50	28 contacts →
	Indirect evidence “Digitale Infrastruktur muss verlässlich, sicher und flexibel sein – ohne Umwege.” Source: RevenueBase Database · checked Sep 28, 2026
13	Mediasystem	Indirect evidence	Reinbek, GermanyHQ checked Sep 28, 2026	51-200	27 contacts →
	Indirect evidence “Agiles Arbeiten.” Source: RevenueBase Database · checked Sep 28, 2026
14	MBS Gmbh, Krefeld	Strong evidence	Krefeld, GermanyHQ checked Sep 28, 2026	51-200	27 contacts →
	Strong evidence “Software services Consulting Communication Protocols Infrastructure Components Gateways, Routers Fieldbus Systems BACnet Since 1987 MBS provides communication solutions in…” Source: RevenueBase Database · checked Sep 28, 2026
15	K-Tel Communications Gmbh	Indirect evidence	Berlin, GermanyHQ checked Sep 28, 2026	11-50	26 contacts →
	Indirect evidence “Seit 1998 finden wir individuelle Business-Lösungen für schnelle, sichere und zuverlässige IT und Telekommunikation.” Source: RevenueBase Database · checked Sep 28, 2026
16	Toplink Gmbh	Indirect evidence	Darmstadt, GermanyHQ checked Sep 28, 2026	11-50	24 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 28, 2026
17	Topcom Kommunikationssysteme Gmbh	Strong evidence	Düsseldorf, GermanyHQ checked Sep 28, 2026	11-50	23 contacts →
	Strong evidence “We offer customized communication solutions that connect all business-critical processes with all major communications media.” Source: RevenueBase Database · checked Sep 28, 2026
18	Esp.Group Gmbh	Indirect evidence	Frankfurt Am Main, GermanyHQ checked Sep 28, 2026	51-200	23 contacts →
	Indirect evidence “Unternehmen Wer wir sind Die ESP.GROUP Unternehmensgruppe mit Hauptsitz in Neu-Isenburg bei Frankfurt ist ein bundes- und europaweit tätiges Beratungsunternehmen für…” Source: RevenueBase Database · checked Sep 28, 2026
19	Caseris Gmbh	Indirect evidence	Stolberg (rhld.), GermanyHQ checked Sep 28, 2026	11-50	22 contacts →
	Indirect evidence “Herzlich Willkommen bei CASERIS!” Source: RevenueBase Database · checked Sep 28, 2026
20	UP Data Systems Gmbh	Indirect evidence	Maumke, GermanyHQ checked Sep 28, 2026	51-200	21 contacts →
	Indirect evidence “UP Data Systems + INNOFACTORY = ONE TEAM Seit über 20 Jahren vertrauen Unternehmen auf UP Data Systems, wenn es um maßgeschneiderte und zukunftssichere ITK-Lösungen geht, die…” Source: RevenueBase Database · checked Sep 28, 2026
21	OFF Telekommunikation Gmbh	Indirect evidence	Börwang, GermanyHQ checked Sep 28, 2026	51-200	21 contacts →
	Indirect evidence “Die OFF Telekommunikation GmbH ist DER Partner für moderne Kommunikationslösungen.” Source: RevenueBase Database · checked Sep 28, 2026
22	COM Plan Service Gmbh, Viernheim	Indirect evidence	Viernheim, GermanyHQ checked Sep 28, 2026	51-200	19 contacts →
	Indirect evidence “COM plan + service zählt zu den großen inhabergeführten Systemhäusern im Bereich der Informationstechnologie in Deutschland.” Source: RevenueBase Database · checked Sep 28, 2026
23	Sit-Solutions	Indirect evidence	Adelsdorf, GermanyHQ checked Sep 28, 2026	11-50	19 contacts →
	Indirect evidence “Your experts in information technology.” Source: RevenueBase Database · checked Sep 28, 2026
24	Lipinski Telekom Gmbh	Indirect evidence	Berlin, GermanyHQ checked Sep 28, 2026	11-50	17 contacts →
	Indirect evidence “LIPINSKI TELEKOM ist Ihr Experte für umfassende Beratung, Planung, Installation und Betreuung von vernetzten Kommunikationslösungen.” Source: RevenueBase Database · checked Sep 28, 2026
25	BPV Enterprise Group	Partial evidence	Unna, GermanyHQ checked Sep 28, 2026	51-200	16 contacts →
	Partial evidence “BPV is active in the telecommunications & IT space, providing managed services and customized solutions to companies of any scale.” Source: RevenueBase Database · checked Sep 28, 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: enterprise communication solutions 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 enterprise communication solutions providers.
Partial evidence: Its own public description names part of enterprise communication solutions providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name enterprise communication solutions 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 172 enterprise communication solutions providers based in Germany

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Enterprise communication solutions providers based in Germany at a glance

As of Sep 28, 2026

47.8%Verified-email coverage

13.8Average contacts per company

11-50Median size (employees)

10.5%Largest-city concentration · Berlin

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

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 172 companies.

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 enterprise communication solutions 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.
What qualifies: Companies headquartered in Germany whose own description of what they do matches “enterprise communication solutions 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 enterprise communication solutions 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 enterprise communication solutions providers, and records with no verified work email. Companies headquartered outside Germany are excluded even when they keep an office there.
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, 1,134 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 28, 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.

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 enterprise communication solutions 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 enterprise communication solutions providers are there based in Germany?

RevenueBase identified 172 enterprise communication solutions providers headquartered in Germany 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?

Nfon AG, headquartered in Munich, tops this list with the largest team on record.

Which city has the most enterprise communication solutions providers?

Berlin leads with 18 headquartered companies, followed by Munchen (6) and Frankfurt Am Main (5).

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 1,134 verified decision-maker contacts tracked across these 172 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 28, 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.