OpenSezam

Trust Authentication

A dedicated team for the success of your projects

Protect your identities against hybrid attacks using our AI-driven security engines
Cybersecurity|Zero Trust Access|Behavioral Analysis|Fraud Detection|Informational Attacks

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“Simplify and strengthen your security continuum powered by our trust algorithms”

NIS2
DORA
Cyber Strategic Autonomy
Cloud / On-Premises
Automated Forensic Reporting
Adaptive Security
Behavioural Signature
Continuous Adaptive Control
Real-Time Decisioning
Dynamic Zero Trust
Execution Context
Continuous Telemetry
Evolving Risk Posture
Behavioral Intelligence
Distributed Monitoring
Fusion Attack Chains
Explainability
EU AI Act
Strong & Weak Signals
Multimodal Analysis

Open Sezam’s solutions

Cybersecurity software publisher specialized in deploying trust algorithms to counter modern and hybrid threats targeting identities.

AuthSezam®

No Password & Frictionless MFA

Simplify MFA and monitoring deployment with a universal passwordless authentication solution.

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SmartSezam®

Continuous behavioral monitoring

Advanced detection of emerging or previously invisible risky behaviors in your information system.

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SmartSezamH®

Informational attacks

Lifecycle management to fight informational and reputational attacks: Detect, understand and act.

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Partners & Ecosystem

Logo de La French Tech Paris-Saclay
Logo de Cyber Booster, incubateur spécialisé en cybersécurité
Logo du CNRS, Centre National de la Recherche Scientifique
Logo d'Inria, institut national de recherche en sciences du numérique
Logo de Systematic Paris-Region, pôle européen des deep tech
Logo OVHcloud Marketplace, vendeur officiel de solutions cloud
Logo de Bpifrance, banque publique d'investissement
Logo de Campus Cyber, acteur engagé pour la cybersécurité en France
Logo de Campus Cyber Nouvelle-Aquitaine, hub régional pour la cybersécurité
Logo France Relance, relance économique du gouvernement français
Logo GICAT défense sécurité
Logo Hexatrust cybersécurité confiance
Logo Hi France innovation tourisme
Logo La Place Stratégique think‑tank France
Logo Qorum SecNum cybersécurité française
Logo OVH Cloud Startup Program
Logo Réseau Entreprendre
Logo Scaleway for startup
Logo Wearin

Co-founders

Emilie
BONNEFOY

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Chief Executive Officer (CEO)

Passionate about new technologies serving progress and the common good, and a graduate of the Institute for Advanced Studies in National Defense (IHEDN), Emilie is responsible for defining and executing Open Sezam’s innovation strategy, as well as overseeing its operational management. She has devoted the past fifteen years to the strategic, operational, and digital development of organizations.

Pierre-Guillaume
GOURIO-JEWELL

Logo Linkedin

Chief Technology Officer (CTO)

Holding a PhD in Applied Mathematics and an engineering degree specializing in complex cyber-defense systems (quantum computing and artificial intelligence) for critical environments within multi-regulated organizations (finance, defense, healthcare, etc.), Pierre-Guillaume defines and implements, together with his team, Open Sezam’s scientific and technological strategy.

Co-founders

Photo Emilie Bonnefoy CEO Open Sezam

Emilie
BONNEFOY

Logo Linkedin

Chief Executive Officer (CEO)

Passionate about new technologies serving progress and the common good, and a graduate of the Institute for Advanced Studies in National Defense (IHEDN), Emilie is responsible for defining and executing Open Sezam’s innovation strategy, as well as overseeing its operational management. She has devoted the past fifteen years to the strategic, operational, and digital development of organizations.

Photo de Pierre Guillaume Gourio Jewell CTO Open Sezam

Pierre-Guillaume
GOURIO-JEWELL

Logo Linkedin

Chief Technology Officer (CTO)

Holding a PhD in Applied Mathematics and an engineering degree specializing in complex cyber-defense systems (quantum computing and artificial intelligence) for critical environments within multi-regulated organizations (finance, defense, healthcare, etc.), Pierre-Guillaume defines and implements, together with his team, Open Sezam’s scientific and technological strategy.

A committed team for the success of your projects

Open Sezam brings together multidisciplinary talents around a common project: protecting its clients against hybrid attacks targeting the identities of organizations and individuals.


We combine the best innovations in the fields of cybersecurity, algorithms and advanced mathematics. Our goal is to simplify deployment, use and administration in complex environments.


Our team is composed of experts, engineers, developers, designers, lawyers, researchers and project managers, all committed to supporting the challenges of CTOs (Chief Technology Officers) and CISOs (Chief Information Security Officers).

A committed team for the success of your projects

Open Sezam brings together multidisciplinary talents around a common project: protecting its clients against hybrid attacks targeting the identities of organizations and individuals.

We combine the best innovations in the fields of cybersecurity, algorithms and advanced mathematics. Our goal is to simplify deployment, use and administration in complex environments.

Our team is composed of experts, engineers, developers, designers, lawyers, researchers and project managers, all committed to supporting the challenges of CTOs (Chief Technology Officers) and CISOs (Chief Information Security Officers).

A committed team for the success of your projects

Open Sezam brings together multidisciplinary talents around a common project: protecting its clients against hybrid attacks targeting the identities of organizations and individuals.


We combine the best innovations in the fields of cybersecurity, algorithms and advanced mathematics. Our goal is to simplify deployment, use and administration in complex environments.


Our team is composed of experts, engineers, developers, designers, lawyers, researchers and project managers, all committed to supporting the challenges of CTOs (Chief Technology Officers) and CISOs (Chief Information Security Officers).

Our mission

Design trust algorithms capable of countering modern threats

Anticipate
and prevent

attacks targeting the identity of individuals and organizations.

Analyze behavioral indicators

to assess risks related to usage and informational environments.

Counter
and protect

attacks by proposing targeted and orchestrated countermeasures in
real-time.

The goal is to support organizations towards adaptive and real-time security, to increase their ability to master the evolution of usage and threats.

Contact our experts

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