Company lists · Data verified August 2026

Top 25 Cryptography consulting firms based in France

Name: Cryptography 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 238 companies tracked

There are 238 cryptography consulting firms headquartered in France (RevenueBase, August 2026). RevenueBase tracks 1,410 professional contacts across them, including 390 with verified work emails and 44 with mobile numbers. Paris is the largest hub.

This list covers cryptography 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.

238Companies

1,410Contacts tracked

390Verified emails

44Mobile numbers

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The 25 largest cryptography consulting firms based in France

Ranked by team size

Top 25 of 238 cryptography 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	CS In Cybersecurity	Le Plessis-Robinson	51-200	75	20
2	Login Sécurité	Saint-Cloud	51-200	60	28
3	Cyberlift	Paris	51-200	55	31
4	Ornisec	Rennes	11-50	40	16
5	Digitemis	Angers	11-50	38	23
6	Excube	Lyon	11-50	33	22
7	Bsecure	Paris	51-200	33	18
8	Cryptonext Security	Paris	11-50	26	13
9	Sec-It	Aix-En-Provence	11-50	26	11
10	Cyberdian Groupe	n/a	11-50	26	4
11	Becycure	n/a	11-50	23	12
12	Dowsers	Paris	11-50	21	10
13	WLF	Paris	11-50	21	6
14	Polaris ST	Saint-Priest	11-50	17	6
15	Functori	Paris	11-50	15	13
16	Allistic	Lille	11-50	15	3
17	Vademi	Melun	11-50	13	5
18	STEEF	Paris	11-50	12	5
19	Tilencia	Paris	11-50	9	1
20	Blackbart	Paris	11-50	7	3
21	Maguen Cyber	Paris	51-200	6	2
22	Leviam	Paris	11-50	5	5
23	Keep Consulting Groupe Rainbow Partners	Neuilly-Sur-Seine	11-50	5	3
24	Piman Security	Boulogne-Billancourt	11-50	5	2
25	Psswrd	Paris	11-50	4	4

Showing 25 of 238 cryptography consulting firms based in France

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Cryptography consulting firms based in France at a glance

As of Aug 28, 2026

1-10Median size (employees)

ParisLargest hub · 83 HQs

44Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

176

11-50

51-200

201-500

Cryptography consulting firms by metro

Metro	Companies
Cryptography consulting firms in Paris	83
Cryptography consulting firms in Lyon	6
Cryptography consulting firms in Toulouse	4
Cryptography consulting firms in Boulogne-Billancourt	4
Cryptography consulting firms in Puteaux	3
Cryptography consulting firms in Rennes	3
Cryptography consulting firms in Aix-En-Provence	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 “cryptography 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; 0 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 cryptography consulting firms are there based in France?

There are 238 cryptography consulting firms headquartered in France as of August 2026 (RevenueBase).

What is the largest company on this list?

CS In Cybersecurity, headquartered in Le Plessis-Robinson, tops this list with the largest team on record.

Which city has the most cryptography consulting firms?

Paris leads with 83 headquartered companies, followed by Lyon (6) and Toulouse (4).

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 390 verified decision-maker contacts tracked across these 238 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.