Company lists · Data verified August 2026

Top 25 Cybersecurity and defense software companies based in France

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 223 companies tracked

There are 223 cybersecurity and defense software companies headquartered in France (RevenueBase, August 2026). RevenueBase tracks 54,782 professional contacts across them, including 21,277 with verified work emails and 2,247 with mobile numbers. Paris is the largest hub.

This list covers cybersecurity and defense software 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.

223Companies

54,782Contacts tracked

21,277Verified emails

2,247Mobile numbers

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The 25 largest cybersecurity and defense software companies based in France

Ranked by team size

Top 25 of 223 cybersecurity and defense software 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	Thales	Meudon	10001+	51,367	20,469
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	Quarkslab	Paris	51-200	94	45
6	CS In Cybersecurity	Le Plessis-Robinson	51-200	75	20
7	Eset France	Marne-La-Vallee	51-200	71	1
8	Amossys Groupe Almond	Rennes	201-500	57	28
9	Omnitech Security	n/a	51-200	55	32
10	Sealsq	Meyreuil	51-200	53	40
11	Sysdream	Levallois-Perret	51-200	53	19
12	Vistory	Velizy-Villacoublay	11-50	43	19
13	CYSEC	Toulouse	11-50	39	15
14	ERIUM	n/a	51-200	38	15
15	Kytl Security	Paris	11-50	34	4
16	Bsecure	Paris	51-200	33	18
17	Randorisec	Paris	11-50	31	18
18	Five Nines	Paris	11-50	26	11
19	Sophos France	Bezons	51-200	24	12
20	Seclab	Perols	11-50	22	13
21	Kyron Solutions Informatiques	Toulouse	11-50	22	10
22	Sylink Technologie	Saint-Jacques-De-La-Lande	201-500	21	1
23	Ého.Link	n/a	11-50	16	13
24	Diateam	Brest	11-50	16	7
25	u.neat	n/a	11-50	15	5

Showing 25 of 223 cybersecurity and defense software companies based in France

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Cybersecurity and defense software companies based in France at a glance

As of Aug 28, 2026

1-10Median size (employees)

ParisLargest hub · 58 HQs

2,247Contacts with mobile numbers

29Emails re-verified in last 30 days

Companies by employee count

1-10

134

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

Cybersecurity and defense software companies by metro

Metro	Companies
Cybersecurity and defense software companies in Paris	58
Cybersecurity and defense software companies in Lyon	12
Cybersecurity and defense software companies in Toulouse	7
Cybersecurity and defense software companies in Rennes	5
Cybersecurity and defense software companies in Lille	4
Cybersecurity and defense software companies in Boulogne-Billancourt	3
Cybersecurity and defense software companies in Velizy-Villacoublay	3

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 and defense software 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; 29 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 and defense software companies are there based in France?

There are 223 cybersecurity and defense software companies headquartered in France as of August 2026 (RevenueBase).

What is the largest company on this list?

Thales, headquartered in Meudon, tops this list with the largest team on record.

Which city has the most cybersecurity and defense software companies?

Paris leads with 58 headquartered companies, followed by Lyon (12) and Toulouse (7).

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 21,277 verified decision-maker contacts tracked across these 223 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.