Company lists · Data refreshed September 2026

Top 14 Cybersecurity firms for blockchain based in France

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

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 54 companies tracked

RevenueBase identified 54 cybersecurity firms for blockchain headquartered in France as of September 2026 and tracks 209 professional contacts across them, including 60 with verified work emails. Paris is the largest hub.

This list covers cybersecurity firms for blockchain headquartered in France, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

54Companies

209Contacts tracked

60Verified emails

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The 14 largest cybersecurity firms for blockchain based in France

Ranked by team size

Top 14 of 54 cybersecurity firms for blockchain based in France, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity firms for blockchain: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Randorisec	Partial evidence	Paris, FranceHQ checked Sep 28, 2026	11-50	32 contacts →
	Partial evidence “Cybersecurity company founded by security experts providing the following services: Security audits, Vulnerability research, SecOps, SecArch and Trainings” Source: RevenueBase Database · checked Sep 28, 2026
2	Fuzzinglabs	Strong evidence	Paris, FranceHQ checked Sep 28, 2026	11-50	28 contacts →
	Strong evidence “Fuzzinglabs is a cybersecurity startup specializing in vulnerability research, fuzzing, offensive and blockchain security.” Source: RevenueBase Database · checked Sep 28, 2026
3	Dowsers	Partial evidence	Paris, FranceHQ checked Sep 28, 2026	11-50	21 contacts →
	Partial evidence “Dowsers : : provides cutting-edge cybersecurity solutions and services which enhance trust in new digital assets such as cryptocurrencies, NFTs, smart contracts and digital…” Source: RevenueBase Database · checked Sep 28, 2026
4	Adonys Security	Partial evidence	Paris, FranceHQ checked Sep 28, 2026	11-50	12 contacts →
	Partial evidence “72h pour vous proposer les profils les moins accessibles du marché, c'est la promesse de l'équipe LeHibou Cybersecurity!” Source: RevenueBase Database · checked Sep 28, 2026
5	Highjack Offensive Cybersecurity	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	1-10	10 contacts →
	Indirect evidence “Chez High Jack, nous sommes bien plus que des accompagnateurs de digitalisation, nous sommes des catalyseurs de la transformation numérique de votre structure!” Source: RevenueBase Database · checked Sep 28, 2026
6	NET Freed	Indirect evidence	Rognac, FranceHQ checked Sep 28, 2026	1-10	5 contacts →
	Indirect evidence “NETFREED, marque du groupe All Freed, est un cabinet de conseil en cybersécurité qui accompagne depuis 2017 des entreprises de toutes tailles.” Source: RevenueBase Database · checked Sep 28, 2026
7	Dataxium	Indirect evidence	Neuilly-sur-seine, FranceHQ checked Sep 28, 2026	11-50	5 contacts →
	Indirect evidence “Dataxium, pure-player cybersécurité basé à Neuilly-sur-Seine, membre Campus Cyber, de l'ACN et labellisé France 2030.” Source: RevenueBase Database · checked Sep 28, 2026
8	Blockchains Experts	Strong evidence	Paris, FranceHQ checked Sep 28, 2026	1-10	4 contacts →
	Strong evidence “Blockchains Experts offers leading cybersecurity services for blockchain.” Source: RevenueBase Database · checked Sep 28, 2026
9	Anguis	Indirect evidence	Toulouse, FranceHQ checked Sep 28, 2026	1-10	4 contacts →
	Indirect evidence “Chez Anguis, nous sommes bien plus qu'une entreprise de sécurité informatique : nous sommes des architectes de la confiance numérique.” Source: RevenueBase Database · checked Sep 28, 2026
10	Exohsi	Indirect evidence	Grenoble, FranceHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence “Le dragon qui veille sur votre trésor numérique Dans un monde où les données sont des joyaux précieux, EXOHSI se dresse contre l’ennemi, ce dernier, prêt à tout pour vous voler…” Source: RevenueBase Database · checked Sep 28, 2026
11	Cylresc	Indirect evidence	Fleurieu-sur-saône, FranceHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence “Cylresc est une société spécialisée dans la Cybersécurité.” Source: RevenueBase Database · checked Sep 28, 2026
12	Sarahro SRO	Partial evidence	Paris, FranceHQ checked Sep 28, 2026	1-10	2 contacts →
	Partial evidence “Chez SarahRo (SRO), nous sommes des experts en prestation de services blockchain.” Source: RevenueBase Database · checked Sep 28, 2026
13	Azursafe	Partial evidence	Nice, FranceHQ checked Sep 28, 2026	1-10	1 contacts →
	Partial evidence “AzurSafe is a French-based technology firm specializing in blockchain compliance, security, and audit solutions.” Source: RevenueBase Database · checked Sep 28, 2026
14	Janka Technologies	Partial evidence	Paris, FranceHQ checked Sep 28, 2026	1-10	1 contacts →
	Partial evidence “A cybersecurity firm with a mission to protect all kinds of organisations, leveraging partnerships across the spectrum” Source: RevenueBase Database · checked Sep 28, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: cybersecurity firms for blockchain. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names cybersecurity firms for blockchain.
Partial evidence: Its own public description names part of cybersecurity firms for blockchain, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity firms for blockchain. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 14 of 54 cybersecurity firms for blockchain based in France

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Cybersecurity firms for blockchain based in France at a glance

As of Sep 28, 2026

28.7%Verified-email coverage

3.9Average contacts per company

1-10Median size (employees)

44.4%Largest-city concentration · Paris

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

Email recency for this list is measured worldwide rather than for France, so it is reported there. Company counts and contact totals on this page are exact for France, over 54 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among cybersecurity firms for blockchain, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in France whose own description of what they do matches “cybersecurity firms for blockchain”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names cybersecurity firms for blockchain), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among cybersecurity firms for blockchain, and records with no verified work email. Companies headquartered outside France are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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: Every listed company carries at least one verified work email, 60 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 28, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names cybersecurity firms for blockchain, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many cybersecurity firms for blockchain are there based in France?

RevenueBase identified 54 cybersecurity firms for blockchain headquartered in France as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Randorisec, headquartered in Paris, tops this list with the largest team on record.

Which city has the most cybersecurity firms for blockchain?

Paris leads with 24 headquartered companies, followed by Nice (3) and Toulouse (2).

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 60 verified decision-maker contacts tracked across these 54 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 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 with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.