Company lists · Data verified August 2026

Top 25 Cybersecurity defense contractors based in France

Name: Cybersecurity defense contractors based in France
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 548 companies tracked

There are 548 cybersecurity defense contractors headquartered in France (RevenueBase, August 2026). RevenueBase tracks 7,142 professional contacts across them, including 2,271 with verified work emails and 171 with mobile numbers. Paris is the largest hub.

This list covers cybersecurity defense contractors 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.

548Companies

7,142Contacts tracked

2,271Verified emails

171Mobile numbers

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The 25 largest cybersecurity defense contractors based in France

Ranked by team size

Top 25 of 548 cybersecurity defense contractors 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	Devoteam Cyber Trust	Levallois-Perret	10001+	342	145
4	Airbus Defence And Space Cyber	Elancourt	501-1,000	223	133
5	Synacktiv	Toulouse	51-200	170	125
6	Cybelangel	Clichy	51-200	161	97
7	ADNOV	n/a	201-500	139	67
8	Itrust	Toulouse	51-200	126	76
9	Quarkslab	Paris	51-200	94	45
10	Exclusive Networks France	Boulogne Billancourt	51-200	93	62
11	Sekera	Saint-Quentin-En-Yvelines	51-200	86	28
12	Magellan Sécurité	Romilly-Sur-Seine	51-200	76	33
13	CS In Cybersecurity	Le Plessis-Robinson	51-200	75	20
14	Aduneo	Malakoff	51-200	73	36
15	Eset France	Marne-La-Vallee	51-200	71	1
16	Login Sécurité	Saint-Cloud	51-200	60	28
17	Cyberlift	Paris	51-200	55	31
18	Techso Group	Paris	51-200	54	24
19	Sysdream	Levallois-Perret	51-200	53	19
20	IT Systemes	Chavanod	11-50	52	2
21	AISI	Montpellier	51-200	50	31
22	Adenis	Bagnolet	51-200	43	15
23	Ornisec	Rennes	11-50	40	16
24	ERIUM	n/a	51-200	38	15
25	MGM Solutions	Bron	11-50	35	23

Showing 25 of 548 cybersecurity defense contractors based in France

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Cybersecurity defense contractors based in France at a glance

As of Aug 28, 2026

1-10Median size (employees)

ParisLargest hub · 176 HQs

171Contacts with mobile numbers

4Emails re-verified in last 30 days

Companies by employee count

1-10

358

11-50

139

51-200

201-500

501-1,000

1,001-5,000

10001+

Cybersecurity defense contractors by metro

Metro	Companies
Cybersecurity defense contractors in Paris	176
Cybersecurity defense contractors in Lyon	18
Cybersecurity defense contractors in Rennes	11
Cybersecurity defense contractors in Toulouse	10
Cybersecurity defense contractors in Boulogne-Billancourt	9
Cybersecurity defense contractors in Nantes	7
Cybersecurity defense contractors in Lille	7

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 defense contractors”, 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; 4 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 defense contractors are there based in France?

There are 548 cybersecurity defense contractors 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 cybersecurity defense contractors?

Paris leads with 176 headquartered companies, followed by Lyon (18) and Rennes (11).

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 2,271 verified decision-maker contacts tracked across these 548 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.