Company lists · Data verified August 2026

Top 25 Cybersecurity consulting firms based in France

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 1,156 companies tracked

There are 1,156 cybersecurity consulting firms headquartered in France (RevenueBase, August 2026). RevenueBase tracks 15,637 professional contacts across them, including 4,953 with verified work emails and 381 with mobile numbers. Paris is the largest hub.

This list covers cybersecurity consulting firms 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.

1,156Companies

15,637Contacts tracked

4,953Verified emails

381Mobile numbers

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The 25 largest cybersecurity consulting firms based in France

Ranked by team size

Top 25 of 1,156 cybersecurity consulting firms 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	Airbus Protect	Blagnac	1,001-5,000	1,429	726
2	I-Tracing	Courbevoie	1,001-5,000	643	394
3	Byblos Group	Lissieu	1,001-5,000	529	34
4	own.security	Rennes	51-200	506	26
5	Metsys	Lille	501-1,000	408	246
6	Synetis	Cesson-Sevigne	201-500	369	209
7	Devoteam Cyber Trust	Levallois-Perret	10001+	342	145
8	Cyllene	Nanterre	201-500	279	206
9	Formind	Issy-Les-Moulineaux	201-500	252	136
10	Intrinsec	Courbevoie	201-500	247	140
11	Synacktiv	Toulouse	51-200	170	125
12	Cybelangel	Clichy	51-200	161	97
13	ADNOV	n/a	201-500	139	67
14	Itrust	Toulouse	51-200	126	76
15	XMCO	Labege	51-200	112	4
16	Egerie	Paris	51-200	110	50
17	Quarkslab	Paris	51-200	94	45
18	Exclusive Networks France	Boulogne Billancourt	51-200	93	62
19	Sekera	Saint-Quentin-En-Yvelines	51-200	86	28
20	CS In Cybersecurity	Le Plessis-Robinson	51-200	75	20
21	Celios	Bordeaux	51-200	73	48
22	Aduneo	Malakoff	51-200	73	36
23	LEXFO	Paris	51-200	65	40
24	Login Sécurité	Saint-Cloud	51-200	60	28
25	FOKUS	Lyon	51-200	60	12

Showing 25 of 1,156 cybersecurity consulting firms based in France

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Cybersecurity consulting firms based in France at a glance

As of Aug 28, 2026

1-10Median size (employees)

ParisLargest hub · 340 HQs

381Contacts with mobile numbers

11Emails re-verified in last 30 days

Companies by employee count

1-10

799

11-50

267

51-200

201-500

501-1,000

1,001-5,000

10001+

Cybersecurity consulting firms by metro

Metro	Companies
Cybersecurity consulting firms in Paris	340
Cybersecurity consulting firms in Lyon	36
Cybersecurity consulting firms in Toulouse	22
Cybersecurity consulting firms in Rennes	16
Cybersecurity consulting firms in Lille	15
Cybersecurity consulting firms in Boulogne-Billancourt	15
Cybersecurity consulting firms in Puteaux	14

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 consulting firms”, 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; 11 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 consulting firms are there based in France?

There are 1,156 cybersecurity consulting firms headquartered in France as of August 2026 (RevenueBase).

What is the largest company on this list?

Airbus Protect, headquartered in Blagnac, tops this list with the largest team on record.

Which city has the most cybersecurity consulting firms?

Paris leads with 340 headquartered companies, followed by Lyon (36) and Toulouse (22).

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 4,953 verified decision-maker contacts tracked across these 1,156 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.