Company lists · Data refreshed September 2026

Top 25 Telecommunication consulting companies based in Germany

Name: Telecommunication consulting companies based in Germany
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 548 companies tracked

RevenueBase identified 548 telecommunication consulting companies headquartered in Germany as of September 2026 and tracks 4,617 professional contacts across them, including 1,638 with verified work emails. Berlin is the largest hub.

This list covers telecommunication consulting companies 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 16, 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 16, 2026 86% judged on-target in blind review

548Companies

4,617Contacts tracked

1,638Verified emails

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The 25 largest telecommunication consulting companies based in Germany

Ranked by team size

Top 25 of 548 telecommunication consulting companies based in Germany, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to telecommunication consulting companies: 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	Plusnet Gmbh	Indirect evidence	Köln, GermanyHQ checked Sep 16, 2026	201-500	248 contacts →
	Indirect evidence “Die Plusnet GmbH, eine Tochtergesellschaft der EnBW, ist ein deutsches Telekommunikationsunternehmen mit Fokus auf Geschäftskunden.” Source: RevenueBase Database · checked Sep 16, 2026
2	Phoenix Engineering	Indirect evidence	Cologne, GermanyHQ checked Sep 16, 2026	501-1,000	181 contacts →
	Indirect evidence “Phoenix Engineering Group is the leader in the field of broadband technologies and infrastructure.” Source: RevenueBase Database · checked Sep 16, 2026
3	Triopt Group	Indirect evidence	Moers, GermanyHQ checked Sep 16, 2026	201-500	172 contacts →
	Indirect evidence “Willkommen bei der TRIOPT GmbH – Ihrem technischen Dienstleister im Bereich Planung, Realisierung und Optimierung im Funk- und Festnetz.” Source: RevenueBase Database · checked Sep 16, 2026
4	Ostertag Detewe	Indirect evidence	Düsseldorf, GermanyHQ checked Sep 16, 2026	201-500	153 contacts →
	Indirect 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 16, 2026
5	M3 Management Consulting Gmbh	Strong evidence	Ismaning/münchen, GermanyHQ checked Sep 16, 2026	51-200	108 contacts →
	Strong evidence “m3 management consulting is a consultancy focused around the network industry (such as utilities and telecommunications), that combines traditional management consulting and…” Source: RevenueBase Database · checked Sep 16, 2026
6	MRK	Indirect evidence	München, GermanyHQ checked Sep 16, 2026	201-500	101 contacts →
	Indirect evidence “Digitalisierungsstrategien, Glasfaserausbau, 5G-Netze und Energiewende: Wir bringen uns aktiv für die Zukunft ein.” Source: RevenueBase Database · checked Sep 16, 2026
7	S-Kon Gruppe	Indirect evidence	Hamburg, GermanyHQ checked Sep 16, 2026	501-1,000	92 contacts →
	Indirect evidence “Seit 2003 sind wir erfolgreich als Fullservice Dienstleister in der Telekommunikationsbranche tätig.” Source: RevenueBase Database · checked Sep 16, 2026
8	Vitronet Gruppe	Indirect evidence	Essen, GermanyHQ checked Sep 16, 2026	1,001-5,000	68 contacts →
	Indirect evidence “Als Firmengruppe gemeinsam stark: Mit mehr als 2.700 Mitarbeitenden an über 40 Standorten sind wir deutschlandweit der führende Dienstleister für die Telekommunikations- und…” Source: RevenueBase Database · checked Sep 16, 2026
9	TKI MBH	Indirect evidence	Chemnitz, GermanyHQ checked Sep 16, 2026	51-200	68 contacts →
	Indirect evidence “Als mittelständisches Unternehmen in der Telekommunikationsbranche sind wir mit mehr als 150 Mitarbeitern und über 30 Jahren Erfahrung ein namhafter Dienstleister im deutschen…” Source: RevenueBase Database · checked Sep 16, 2026
10	Gamma DE	Indirect evidence	Oberkotzau, GermanyHQ checked Sep 16, 2026	51-200	67 contacts →
	Indirect evidence “Die HFO Telecom GmbH verbindet modernste Technologien im Telekommunikationsbereich mit langjähriger Erfahrung.” Source: RevenueBase Database · checked Sep 16, 2026
11	HKT Gmbh	Indirect evidence	Bochum, GermanyHQ checked Sep 16, 2026	201-500	62 contacts →
	Indirect evidence “Als eines der führenden Unternehmen in den Bereichen Engineering und Operations sorgen wir bundesweit sowie auch international für funktionierende Infrastrukturen im Festnetz- und…” Source: RevenueBase Database · checked Sep 16, 2026
12	Sinnwell Gmbh	Indirect evidence	München, GermanyHQ checked Sep 16, 2026	51-200	55 contacts →
	Indirect evidence “Sinnwell GmbH ist ein schnell wachsendes Unternehmen, welches für Generalunternehmer im Mobilfunkbereich Dienstleistungen für den Netzaufbau erbringt.” Source: RevenueBase Database · checked Sep 16, 2026
13	TMK Thomas Mack Kommunikation Gmbh	Indirect evidence	Muenzenberg, GermanyHQ checked Sep 16, 2026	51-200	50 contacts →
	Indirect evidence “Die nächste wichtige IT-Entscheidung steht an?” Source: RevenueBase Database · checked Sep 16, 2026
14	CMS It-Consulting Gmbh	Indirect evidence	Neukeferloh, GermanyHQ checked Sep 16, 2026	51-200	49 contacts →
	Indirect evidence “Networks are the backbone of modern organizations.” Source: RevenueBase Database · checked Sep 16, 2026
15	Bitconex Gmbh	Indirect evidence	Munich, GermanyHQ checked Sep 16, 2026	51-200	43 contacts →
	Indirect evidence “About BITConEx Since 2008, BITConEx has been synonymous with excellent IT architectures utilising the latest technologies and standards, as well as in-depth process expertise…” Source: RevenueBase Database · checked Sep 16, 2026
16	STF Tele Consult	Indirect evidence	Dülmen, GermanyHQ checked Sep 16, 2026	201-500	41 contacts →
	Indirect evidence “Die STF TeleConsult bietet ihren Kunden umfassende 360-Grad Telekommunikationsdienstleistungen: von der Messung, über Planung, Realisierung, Inbetriebnahme und Abnahme.” Source: RevenueBase Database · checked Sep 16, 2026
17	Gftd Gmbh	Indirect evidence	Dortmund, GermanyHQ checked Sep 16, 2026	201-500	39 contacts →
	Indirect evidence “GfTD steht für effiziente Beratungs- und Dienstleistungen im Telekommunikationsmarkt.” Source: RevenueBase Database · checked Sep 16, 2026
18	SH Business COM Gmbh	Indirect evidence	Herbolzheim, GermanyHQ checked Sep 16, 2026	51-200	36 contacts →
	Indirect evidence “SH business COM, zählt seit über 30 Jahren zu den größten und leistungsstärksten Kommunikationszentren in Deutschland.” Source: RevenueBase Database · checked Sep 16, 2026
19	K-Tel Communications Gmbh	Indirect evidence	Berlin, GermanyHQ checked Sep 16, 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 16, 2026
20	Syno Consulting Group AG	Indirect evidence	Hamburg, GermanyHQ checked Sep 16, 2026	51-200	26 contacts →
	Indirect evidence “SYNO steht für Synergien.” Source: RevenueBase Database · checked Sep 16, 2026
21	Tele Thorwarth Gmbh	Indirect evidence	Schmalkalden, GermanyHQ checked Sep 16, 2026	51-200	25 contacts →
	Indirect evidence “Die TELE THORWARTH GmbH realisiert für Geschäftskunden aller Branchen professionelle und innovative Lösungen in der Telekommunikation mit den Schwerpunkten Mobil- und Festnetze…” Source: RevenueBase Database · checked Sep 16, 2026
22	DOK Systeme Gmbh	Indirect evidence	Garbsen, GermanyHQ checked Sep 16, 2026	51-200	24 contacts →
	Indirect evidence “Die ITK-Spezialisten der DOK SYSTEME Ingenieurgesellschaft für Kommunikationstechnik mbH beraten bundesweit seit über 30 Jahren herstellerneutral und kundenindividuell vor allem…” Source: RevenueBase Database · checked Sep 16, 2026
23	Gimbel Consulting Gmbh	Partial evidence	Grasberg, GermanyHQ checked Sep 16, 2026	201-500	24 contacts →
	Partial evidence “Gimbel Consulting unterstützt bereits seit über 25 Jahren Netzbetreiber, Rechenzentrumsbetreiber, Ausrüster, Integratoren und sicherheitsrelevante Organisationen bei Planung…” Source: RevenueBase Database · checked Sep 16, 2026
24	MPC Service Gmbh	Indirect evidence	Heidelberg, GermanyHQ checked Sep 16, 2026	51-200	23 contacts →
	Indirect evidence “MPC ist eine auf das Thema ITK Infrastruktur Sourcing + Connectivity spezialisierte Unternehmensberatung.” Source: RevenueBase Database · checked Sep 16, 2026
25	Esp.Group Gmbh	Indirect evidence	Frankfurt Am Main, GermanyHQ checked Sep 16, 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 16, 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: telecommunication consulting companies. 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 telecommunication consulting companies.
Partial evidence: Its own public description names part of telecommunication consulting companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name telecommunication consulting companies. 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 548 telecommunication consulting companies based in Germany

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Telecommunication consulting companies based in Germany at a glance

As of Sep 16, 2026

35.5%Verified-email coverage

8.4Average contacts per company

1-10Median size (employees)

6.2%Largest-city concentration · Berlin

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

282

11-50

163

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 548 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 telecommunication consulting companies, 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 “telecommunication consulting companies”. 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 telecommunication consulting companies), 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 telecommunication consulting companies, 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, 1,638 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 16, 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.

Telecommunication consulting companies by metro

Telecommunication consulting companies in Berlin34

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 telecommunication consulting companies, 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 telecommunication consulting companies are there based in Germany?

RevenueBase identified 548 telecommunication consulting companies 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?

Plusnet Gmbh, headquartered in Koln, tops this list with the largest team on record.

Which city has the most telecommunication consulting companies?

Berlin leads with 34 headquartered companies, followed by Hamburg (24) and Dusseldorf (18).

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 1,638 verified decision-maker contacts tracked across these 548 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 16, 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.