Company lists · Data verified August 2026

Top 25 Data security consulting firms based in France

Name: Data security 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 899 companies tracked

There are 899 data security consulting firms headquartered in France (RevenueBase, August 2026). RevenueBase tracks 10,582 professional contacts across them, including 2,926 with verified work emails and 232 with mobile numbers. Paris is the largest hub.

This list covers data security 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.

899Companies

10,582Contacts tracked

2,926Verified emails

232Mobile numbers

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The 25 largest data security consulting firms based in France

Ranked by team size

Top 25 of 899 data security 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	Onet Sécurité	n/a	10001+	1,008	214
2	I-Tracing	Courbevoie	1,001-5,000	643	394
3	own.security	Rennes	51-200	506	26
4	Synetis	Cesson-Sevigne	201-500	369	209
5	Devoteam Cyber Trust	Levallois-Perret	10001+	342	145
6	Intrinsec	Courbevoie	201-500	247	140
7	Stordata	Nantes	51-200	149	110
8	ADNOV	n/a	201-500	139	67
9	XMCO	Labege	51-200	112	4
10	Sekera	Saint-Quentin-En-Yvelines	51-200	86	28
11	Hara Consulting	Strasbourg	51-200	81	65
12	CS In Cybersecurity	Le Plessis-Robinson	51-200	75	20
13	Aduneo	Malakoff	51-200	73	36
14	Login Sécurité	Saint-Cloud	51-200	60	28
15	FOKUS	Lyon	51-200	60	12
16	Scassi	n/a	51-200	57	29
17	Cyberlift	Paris	51-200	55	31
18	IT Systemes	Chavanod	11-50	52	2
19	AISI	Montpellier	51-200	50	31
20	CONIX	Paris	51-200	48	15
21	digital.security	Bezons	201-500	45	18
22	IDNA	Paris	11-50	42	15
23	Ornisec	Rennes	11-50	40	16
24	Løvell	Paris	11-50	38	25
25	ZIWIT	Boulogne-Billancourt	51-200	38	11

Showing 25 of 899 data security consulting firms based in France

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Data security consulting firms based in France at a glance

As of Aug 28, 2026

1-10Median size (employees)

ParisLargest hub · 245 HQs

232Contacts with mobile numbers

3Emails re-verified in last 30 days

Companies by employee count

1-10

645

11-50

197

51-200

201-500

1,001-5,000

10001+

Data security consulting firms by metro

Metro	Companies
Data security consulting firms in Paris	245
Data security consulting firms in Lyon	32
Data security consulting firms in Toulouse	15
Data security consulting firms in Lille	11
Data security consulting firms in Rennes	10
Data security consulting firms in Bordeaux	10
Data security consulting firms in Puteaux	10

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 “data security 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; 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 data security consulting firms are there based in France?

There are 899 data security consulting firms headquartered in France as of August 2026 (RevenueBase).

What is the largest company on this list?

Onet Sécurité, headquartered in France, tops this list with the largest team on record.

Which city has the most data security consulting firms?

Paris leads with 245 headquartered companies, followed by Lyon (32) and Toulouse (15).

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 2,926 verified decision-maker contacts tracked across these 899 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.