Company lists · Data verified August 2026

Top 25 Cybersecurity incident response firms based in France

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 385 companies tracked

There are 385 cybersecurity incident response firms headquartered in France (RevenueBase, August 2026). RevenueBase tracks 5,550 professional contacts across them, including 1,659 with verified work emails and 142 with mobile numbers. Paris is the largest hub.

This list covers cybersecurity incident response 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.

385Companies

5,550Contacts tracked

1,659Verified emails

142Mobile numbers

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The 25 largest cybersecurity incident response firms based in France

Ranked by team size

Top 25 of 385 cybersecurity incident response 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	I-Tracing	Courbevoie	1,001-5,000	643	394
2	own.security	Rennes	51-200	506	26
3	Formind	Issy-Les-Moulineaux	201-500	252	136
4	Synacktiv	Toulouse	51-200	170	125
5	Cybelangel	Clichy	51-200	161	97
6	XMCO	Labege	51-200	112	4
7	Egerie	Paris	51-200	110	50
8	Sekera	Saint-Quentin-En-Yvelines	51-200	86	28
9	CS In Cybersecurity	Le Plessis-Robinson	51-200	75	20
10	Strangebee	Paris	51-200	66	42
11	LEXFO	Paris	51-200	65	40
12	Cyberlift	Paris	51-200	55	31
13	Techso Group	Paris	51-200	54	24
14	Qevlar AI	Paris	51-200	51	31
15	Ornisec	Rennes	11-50	40	16
16	Løvell	Paris	11-50	38	25
17	ERIUM	n/a	51-200	38	15
18	Kytl Security	Paris	11-50	34	4
19	Excube	Lyon	11-50	33	22
20	Bsecure	Paris	51-200	33	18
21	Randorisec	Paris	11-50	31	18
22	ACE Service	Rouen	11-50	30	5
23	Abakus Sécurité	Paris	11-50	29	8
24	Cybersel Group	Paris	11-50	27	18
25	Sec-It	Aix-En-Provence	11-50	26	11

Showing 25 of 385 cybersecurity incident response firms based in France

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Cybersecurity incident response firms based in France at a glance

As of Aug 28, 2026

1-10Median size (employees)

ParisLargest hub · 137 HQs

142Contacts with mobile numbers

3Emails re-verified in last 30 days

Companies by employee count

1-10

261

11-50

51-200

201-500

1,001-5,000

10001+

Cybersecurity incident response firms by metro

Metro	Companies
Cybersecurity incident response firms in Paris	137
Cybersecurity incident response firms in Lyon	15
Cybersecurity incident response firms in Rennes	10
Cybersecurity incident response firms in Toulouse	9
Cybersecurity incident response firms in Lille	9
Cybersecurity incident response firms in Puteaux	7
Cybersecurity incident response firms in Nantes	6

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 incident response 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 cybersecurity incident response firms are there based in France?

There are 385 cybersecurity incident response firms 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 incident response firms?

Paris leads with 137 headquartered companies, followed by Lyon (15) and Rennes (10).

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 1,659 verified decision-maker contacts tracked across these 385 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.