Company lists · Data verified August 2026

Top 25 Cybersecurity energy sector companies based in Germany

Name: Cybersecurity energy sector companies based in Germany
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 62 companies tracked

There are 62 cybersecurity energy sector companies headquartered in Germany (RevenueBase, August 2026). RevenueBase tracks 1,345 professional contacts across them, including 608 with verified work emails and 19 with mobile numbers. Berlin is the largest hub.

This list covers cybersecurity energy sector companies headquartered in Germany, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

62Companies

1,345Contacts tracked

608Verified emails

19Mobile numbers

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The 25 largest cybersecurity energy sector companies based in Germany

Ranked by team size

Top 25 of 62 cybersecurity energy sector companies based in Germany, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	G Data Cyberdefense	Bochum	501-1,000	389	154
2	Telekom Security	Bonn	1,001-5,000	360	183
3	450connect Gmbh	Cologne	51-200	93	48
4	Water IT Security & Defense	Dusseldorf	51-200	55	20
5	Prosec Gmbh	Munchen	51-200	49	29
6	Communication Systems Gmbh	Neu-Isenburg	51-200	36	21
7	Ausecus Gmbh	Augsburg	11-50	31	20
8	Rhebo OT & Iiot Security	Leipzig	11-50	27	17
9	Allgeier Cyris Gmbh	Bremen	51-200	27	14
10	Enbw Cyber Security Gmbh	Karlsruhe	11-50	22	13
11	Incyde	Leipzig	11-50	20	12
12	Cyber Samurai Gmbh	Vaterstetten	11-50	16	10
13	BXC Security	Hallbergmoos	11-50	16	9
14	Keepbit	Augsburg	11-50	14	5
15	Securnite Gmbh	Dusseldorf	11-50	13	9
16	Data-Sec Gmbh	March	11-50	12	5
17	Sequire Technology	Saarbrucken	1-10	11	8
18	Otifyd	Grunwald	11-50	11	2
19	Adaptron Gmbh Solution Technology	Mammendorf	11-50	10	4
20	Securance Gmbh	Dusseldorf	1-10	9	4
21	Ikomm Gmbh	Furth	11-50	7	6
22	Neomint Gmbh	n/a	1-10	6	1
23	Layer 8 Consulting	Koln	1-10	5	2
24	Fernao Group Gmbh	Koln	501-1,000	4	2
25	Breakinlabs	Regensburg	1-10	3	2

Showing 25 of 62 cybersecurity energy sector companies based in Germany

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Cybersecurity energy sector companies based in Germany at a glance

As of Aug 28, 2026

11-50Median size (employees)

BerlinLargest hub · 8 HQs

19Contacts with mobile numbers

2Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Cybersecurity energy sector companies by metro

Metro	Companies
Cybersecurity energy sector companies in Berlin	8
Cybersecurity energy sector companies in Dusseldorf	3
Cybersecurity energy sector companies in Leipzig	3
Cybersecurity energy sector companies in Erfurt	2
Cybersecurity energy sector companies in Bremen	2
Cybersecurity energy sector companies in Bochum	2
Cybersecurity energy sector companies in Augsburg	2
Cybersecurity energy sector companies in Koln	2

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “cybersecurity energy sector companies”, with match quality audited by blind human judging, and headquartered in Germany.
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: Contact records re-verify on a rolling cadence; 2 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many cybersecurity energy sector companies are there based in Germany?

There are 62 cybersecurity energy sector companies headquartered in Germany as of August 2026 (RevenueBase).

What is the largest company on this list?

G Data Cyberdefense, headquartered in Bochum, tops this list with the largest team on record.

Which city has the most cybersecurity energy sector companies?

Berlin leads with 8 headquartered companies, followed by Dusseldorf (3) and Leipzig (3).

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 608 verified decision-maker contacts tracked across these 62 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.