Company lists · Data verified August 2026

Top 25 Defense cybersecurity companies based in France

Name: Defense cybersecurity companies based in France
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 367 companies tracked

There are 367 defense cybersecurity companies headquartered in France (RevenueBase, August 2026). RevenueBase tracks 5,235 professional contacts across them, including 1,435 with verified work emails and 96 with mobile numbers. Paris is the largest hub.

This list covers defense cybersecurity companies headquartered in France, 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.

367Companies

5,235Contacts tracked

1,435Verified emails

96Mobile numbers

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The 25 largest defense cybersecurity companies based in France

Ranked by team size

Top 25 of 367 defense cybersecurity companies based in France, 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	I-Tracing	Courbevoie	1,001-5,000	643	394
2	own.security	Rennes	51-200	506	26
3	Airbus Defence And Space Cyber	Elancourt	501-1,000	223	133
4	Itrust	Toulouse	51-200	126	76
5	XMCO	Labege	51-200	112	4
6	Quarkslab	Paris	51-200	94	45
7	Magellan Sécurité	Romilly-Sur-Seine	51-200	76	33
8	CS In Cybersecurity	Le Plessis-Robinson	51-200	75	20
9	Eset France	Marne-La-Vallee	51-200	71	1
10	Amossys Groupe Almond	Rennes	201-500	57	28
11	Techso Group	Paris	51-200	54	24
12	Sysdream	Levallois-Perret	51-200	53	19
13	ERIUM	n/a	51-200	38	15
14	MGM Solutions	Bron	11-50	35	23
15	Kytl Security	Paris	11-50	34	4
16	Excube	Lyon	11-50	33	22
17	Bsecure	Paris	51-200	33	18
18	Randorisec	Paris	11-50	31	18
19	ACE Service	Rouen	11-50	30	5
20	Abakus Sécurité	Paris	11-50	29	8
21	Five Nines	Paris	11-50	26	11
22	Sec-It	Aix-En-Provence	11-50	26	11
23	Becycure	n/a	11-50	23	12
24	Kyron Solutions Informatiques	Toulouse	11-50	22	10
25	Manika	La Defense	201-500	22	5

Showing 25 of 367 defense cybersecurity companies based in France

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Defense cybersecurity companies based in France at a glance

As of Aug 28, 2026

1-10Median size (employees)

ParisLargest hub · 122 HQs

96Contacts with mobile numbers

3Emails re-verified in last 30 days

Companies by employee count

1-10

237

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

Defense cybersecurity companies by metro

Metro	Companies
Defense cybersecurity companies in Paris	122
Defense cybersecurity companies in Lyon	14
Defense cybersecurity companies in Toulouse	6
Defense cybersecurity companies in Rennes	6
Defense cybersecurity companies in Lille	5
Defense cybersecurity companies in Boulogne-Billancourt	5
Defense cybersecurity companies in Rouen	4

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 “defense cybersecurity companies”, with match quality audited by blind human judging, and headquartered in France.
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; 3 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 defense cybersecurity companies are there based in France?

There are 367 defense cybersecurity companies headquartered in France as of August 2026 (RevenueBase).

What is the largest company on this list?

I-Tracing, headquartered in Courbevoie, tops this list with the largest team on record.

Which city has the most defense cybersecurity companies?

Paris leads with 122 headquartered companies, followed by Lyon (14) and Toulouse (6).

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 1,435 verified decision-maker contacts tracked across these 367 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.