Company lists · Data refreshed September 2026

Top 25 Telecom security consulting companies based in France

Name: Telecom security consulting companies based in France
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 6, 2026 408 companies tracked

RevenueBase identified 408 telecom security consulting companies headquartered in France as of September 2026 and tracks 5,045 professional contacts across them, including 1,011 with verified work emails and 135 with mobile numbers. Paris is the largest hub.

This list covers telecom security consulting companies 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 6, 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 6, 2026 86% judged on-target in blind review

408Companies

5,045Contacts tracked

1,011Verified emails

135Mobile numbers

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The 25 largest telecom security consulting companies based in France

Ranked by team size

Top 25 of 408 telecom security consulting companies based in France, ranked by team size, largest first. Data refreshed Sep 6, 2026. RevenueBase Smart Search rates how each company's information relates to telecom security consulting companies: 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	Nexecur	Indirect evidence	Coulaines, FranceHQ checked Sep 6, 2026	501-1,000	356 contacts →
	“Spécialiste de la télésurveillance, des systèmes d’alarmes et de la téléassistance depuis près de 40 ans, Nexecur s'engage pour votre sécurité en s'appuyant sur l'expérience et la…” Source: company website · checked Sep 6, 2026
2	Alleo DE Bouygues Telecom	Partial evidence	Clichy, FranceHQ checked Sep 6, 2026	51-200	117 contacts →
	“Après de nombreuses années de présence à vos côtés sous le nom 1913, notre marque évolue pour devenir ALLEO de Bouygues Telecom.” Source: company website · checked Sep 6, 2026
3	XMCO	Partial evidence	Paris, FranceHQ checked Sep 6, 2026	51-200	111 contacts →
	“Our services : Penetration tests and Security Audits, Gap Analysis and PCI DSS Certification, CERT-XMCO (vulnerability watch, Cyber Survellance/Threat Intelligence, Forensics).” Source: company website · checked Sep 6, 2026
4	L'agence Télécom	Indirect evidence	Marseille, FranceHQ checked Sep 6, 2026	51-200	101 contacts →
	“Offering you the best of SFR Business.” Source: company website · checked Sep 6, 2026
5	Novadis	Indirect evidence	Levallois Perret, FranceHQ checked Sep 6, 2026	11-50	79 contacts →
	“Fort de 10 années d’expérience et d’innovation dans le domaine de la sûreté, Novadis vous accompagne dans l’élaboration de solutions convergentes et interopérables.” Source: company website · checked Sep 6, 2026
6	CS In Cybersecurity	Indirect evidence	Le Plessis-robinson, FranceHQ checked Sep 6, 2026	51-200	75 contacts →
	“Acteur majeur de la cybersécurité, CS Group s'appuie sur ses équipes sont composées d’experts pluridisciplinaires qui offrent à nos clients une vision claire et une capacité…” Source: company website · checked Sep 6, 2026
7	Login Sécurité	Indirect evidence	Saint-cloud, FranceHQ checked Sep 6, 2026	51-200	59 contacts →
	“LA SÉCURITÉ CRÉATRICE DE VALEUR POUR LES CLIENTS Login Sécurité accompagne les DSI dans la définition et la mise en œuvre de leur stratégie de Confiance Numérique.” Source: company website · checked Sep 6, 2026
8	Sysdream	Indirect evidence	Levallois-perret, FranceHQ checked Sep 6, 2026	51-200	52 contacts →
	“À propos de SYSDREAM : Fondée il y a plus de 20 ans, Sysdream, filiale Cybersécurité du Groupe Hub One, propose aux comptes publics et privés une offre globale de solutions…” Source: company website · checked Sep 6, 2026
9	Ewolve	Indirect evidence	Levallois-perret, FranceHQ checked Sep 6, 2026	51-200	48 contacts →
	“Expert dans le domaine des Centres de services EWOLVE (anciennement VTR Réseau & Sécurité) est devenu un partenaire incontournable des acteurs de l'IT et des Télécoms.” Source: company website · checked Sep 6, 2026
10	Redopus	Indirect evidence	Paris, FranceHQ checked Sep 6, 2026	11-50	47 contacts →
	“Créé en 2017, REDOPUS est spécialisée en sécurité, réseaux des systèmes d'informations.” Source: company website · checked Sep 6, 2026
11	Dcit Conseil	Indirect evidence	Sene, FranceHQ checked Sep 6, 2026	n/a	47 contacts →
	“DCIT Conseil, société de services de consultation spécialisée dans la cybersécurité et les technologies de l'information.” Source: company website · checked Sep 6, 2026
12	Ornisec	Indirect evidence	Rennes, FranceHQ checked Sep 6, 2026	11-50	40 contacts →
	“ORNISEC est un cabinet d’expertise à la pointe de la cybersécurité, qualifié PASSI RGS, PACS et PASSI LPM par l'ANSSI.” Source: company website · checked Sep 6, 2026
13	Setec IS	Indirect evidence	Paris, FranceHQ checked Sep 6, 2026	11-50	40 contacts →
	“setec is est une filiale du Groupe setec, spécialisée dans le conseil et l’ingénierie dans le domaine des infrastructures IT, télécom, réseaux et cybersécurité.” Source: company website · checked Sep 6, 2026
14	Ranc Developpement	Indirect evidence	Fos Sur Mer, FranceHQ checked Sep 6, 2026	51-200	39 contacts →
	“Ranc Développement vous propose une solution globale de sécurité, clés en main.” Source: company website · checked Sep 6, 2026
15	Ambition Consulting & Services	Partial evidence	Villeurbanne, FranceHQ checked Sep 6, 2026	51-200	38 contacts →
	“Ambition Consulting & Services (AC & S)” Source: company website · checked Sep 6, 2026
16	Excube	Indirect evidence	Lyon, FranceHQ checked Sep 6, 2026	11-50	33 contacts →
	“Notre positionnement Fondé en 2018, EXCUBE, cabinet-conseil spécialisé en Cybersécurité, délivre ses prestations en s’appuyant sur la connaissance du métier de ses clients…” Source: company website · checked Sep 6, 2026
17	Comunic	Indirect evidence	Annecy, FranceHQ checked Sep 6, 2026	11-50	31 contacts →
	“COMUNIC est une société de conseils et services en Informatique, Téléphonie, Vidéosurveillance et Web pour les professionnels.” Source: company website · checked Sep 6, 2026
18	Global Concept	Indirect evidence	Courbevoie, FranceHQ checked Sep 6, 2026	501-1,000	31 contacts →
	“Depuis sa création en 1998, l’ambition du groupe Global Concept est d’apporter des solutions globales et adaptées aux spécificités des métiers de nos clients.” Source: company website · checked Sep 6, 2026
19	Neywork	Indirect evidence	Paris La Défense, FranceHQ checked Sep 6, 2026	11-50	29 contacts →
	“Nous sommes : Neywork est un cabinet de conseil spécialisé en réseau et sécurité Fondé en 2018 par un architecte spécialisé en réseau et sécurité, Neywork apporte des solutions…” Source: company website · checked Sep 6, 2026
20	P1 Security	Indirect evidence	Paris, FranceHQ checked Sep 6, 2026	11-50	29 contacts →
	“We provide services and technologies to identify, detect and recover from critical threats and vulnerabilities on signalling protocols like SS7/SIGTRAN, Diameter, GPRS/GTP, IMS…” Source: company website · checked Sep 6, 2026
21	4connect	Indirect evidence	Boulogne-billancourt, FranceHQ checked Sep 6, 2026	11-50	27 contacts →
	“4Connect est la filiale technique de L’Agence Télécom.” Source: company website · checked Sep 6, 2026
22	Sec-It	Indirect evidence	Levallois-perret, FranceHQ checked Sep 6, 2026	11-50	27 contacts →
	“SEC-IT, filiale du groupe MCA, est le partenaire de référence en cybersécurité, combinant expertise en audit conseil, sécurité opérationnelle et formation pour accompagner les…” Source: company website · checked Sep 6, 2026
23	AKTEA	Indirect evidence	Eysines, FranceHQ checked Sep 6, 2026	11-50	26 contacts →
	“Depuis 2005, nous sommes spécialisés en sécurité, infrastructures et communications unifiées.” Source: company website · checked Sep 6, 2026
24	Groupe Topensi	Indirect evidence	Calais, FranceHQ checked Sep 6, 2026	11-50	25 contacts →
	“En 2011, Nicolas Bouloy quitte son poste d’ingénieur système chez Microsoft pour se lancer à la création de sa propre entreprise Topensi.” Source: company website · checked Sep 6, 2026
25	Alp'com	Indirect evidence	Fillinges, FranceHQ checked Sep 6, 2026	11-50	22 contacts →
	“Alp'com est une filiale d'Access Group (depuis 2013) qui existe depuis 1992 proche de ses clients en Rhône-Alpes et à leurs côtés partout en France (Fillinges (siège), Annecy…” Source: company website · checked Sep 6, 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: telecom security consulting companies. 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 telecom security consulting companies.
Partial evidence: Its own public description names part of telecom security consulting companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name telecom security consulting companies. 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 25 of 408 telecom security consulting companies based in France

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Telecom security consulting companies based in France at a glance

As of Sep 6, 2026

20.0%Verified-email coverage

2.7%Mobile-number coverage

12.4Average contacts per company

1-10Median size (employees)

16.7%Largest-city concentration · Paris

Sep 6, 2026Page data refreshed

Companies by employee count

1-10

271

11-50

107

51-200

501-1,000

1,001-5,000

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

9500–30

6031–60

061–90

090–180

1180+

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 telecom security consulting companies, 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 “telecom security consulting companies”. 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 telecom security consulting companies), 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 telecom security consulting companies, 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, 1,011 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 6, 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.

Telecom security consulting companies by metro

Telecom security consulting companies in Paris68

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 telecom security consulting companies, 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 telecom security consulting companies are there based in France?

RevenueBase identified 408 telecom security consulting companies 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?

Nexecur, headquartered in Coulaines, tops this list with the largest team on record.

Which city has the most telecom security consulting companies?

Paris leads with 68 headquartered companies, followed by Lyon (9) and Boulogne-Billancourt (7).

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 1,011 verified decision-maker contacts tracked across these 408 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 6, 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.