• Born to defend your critical assets

    Cyberthreats are a combination of technical and human resources. Defenses must be too.
    The synergies we create between our Threat Defense Center – the first European
    threat intelligence solution – and our consultants allow our customers to anticipate
    and respond to threats like they never could before.


  • They trust us

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Threat intelligence, cornerstone of your security

Icône threat defense center

Threat Defense Center

Our threat intelligence platform allows our users to effectively adapt their defense tactics to combat ongoing and oncoming operations that target their organization. Some threats our Threat Defense Center can tackle:

15 years of front-line human experience meet the best big data technologies


@ Lexsi threat intelligence

From information...
... to intelligence

Raw data aggregation

  • Global network of honeypots
  • Partners’ and CERTs’ feeds
  • Automatic crawlers and probes
  • Infiltrated cybercriminal forums


  • Extraction of customer-related information
  • Data correlation and scoring


  • Full qualification of the potential threats
  • Investigations, workarounds, patches
  • Response and takedowns



Andrei Dumitrescu is a speaker for Hackito Ergo Sum the 24 April 2014. Andrei is a pentester for LEXSI, a CTF enthusiast thanks to the Hackerzvoice CTF team.

Talk subject  :...

The blog


The Dridex spam wave has now been hitting France for more than a month. Until now, the spam pattern serving this malware has remained more or less similar, that is :

  • A text in french...

Talking about us !



Logo Areva
Logo EDF
Logo Veolia
Logo Pole emploi
Logo AXA
Logo Bandai Namco
Logo Banque postale
Logo Credit agricole
Logo douanes
Logo Interpol
Logo KBC
Loog Boiron
Logo Ministere
Logo ministere economie
Logo republique francaise
Logo Safran
Logo Saint-gobain
Logo Societe generale
Logo Caisse des depots

Lexsi : first company specialized in cybersecurity services in France

Lexsi was born to defend companies’ critical cyber-assets. 15 years after its creation, Lexsi’s services help protect 500+ customers, lot of them among the most exposed organizations in the world and orchestrates its offer around 2 axes: anticipation and retaliation.

Anticipation consists in providing customers with the means required to limit their risk exposure and get poised for a possible breach - Retaliation is a post-incident, quick-response process that aims at breaking an attack in no time and at minimizing its aftermaths.

Tel. : +33 (0)1 55 86 88 88 | Fax : +33 (0)1 55 86 88 89 | Email : info@lexsi.com
Location : LEXSI - Tours Mercuriales - 40 rue Jean Jaurès - 93170 BAGNOLET - France

Independent cybersecurity consulting firm Paris - Lyon - Lille - Montréal - Singapour © Copyright 2014 - LEXSI group Legal Notice | Sitemap | Verywell Agency