Dékuple is a leading French group specializing in data-driven marketing and cross-channel communication. A European powerhouse in its sector, Dékuple supports over 500 brands in optimizing both their commercial performance and customer relationships through a fully integrated offering that combines consulting, creativity, technology, and performance.
Founded in 1972 and publicly listed, the company employs over 1,000 people and is experiencing strong growth, driven by digital marketing, artificial intelligence, and strategic European acquisitions.
The benefits of the solution are numerous. Above all, it’s incredibly easy to use. Everything related to phishing campaigns is crystal clear, statistics, customizable scenarios, dynamic groups. It’s a solution that’s intuitive, actionable, and genuinely impactful.
— Sophie D., Group CISO
Challenge
Since summer 2021, Dékuple has been using Arsen to run phishing simulation campaigns. Prior to that, human risk was not formally addressed, no real initiatives had been put in place internally.
Arsen filled that gap by introducing a structured and practical approach to the issue of social engineering.
The deployment followed a strategic three-step framework:
- Build awareness among employees
- Train reflexes against manipulation and psychological biases
- Raise cybersecurity maturity and culture across the organization
The goal wasn’t just to simulate attacks, it was to create long-term behavioral change.
Solution
What set Arsen apart for Dékuple was its powerful yet flexible feature set, especially the ability to launch unlimited campaigns on-demand.
Its ease of use, scenario customization, and the clarity of its insights enabled Dékuple to adopt an entirely new approach to managing human cyber risk at scale.
The platform's reliable execution, data-rich reporting, and educational value allowed the security team to boost internal awareness while embedding a strong cyber culture across departments.
Arsen’s impact even led to a restructuring of security leadership at the group level, with the creation of a centralized CISO team, driving alignment and elevating cybersecurity as a strategic pillar.
Results
Across its campaigns, Dékuple has seen its security score nearly double, a clear upward trend showing strong adoption and increased vigilance.
Employees are now far more proactive, regularly reporting suspicious emails to the incident response team.
This measurable progress reflects the emergence of a lasting security culture, one of the key objectives behind the company’s adoption of Arsen.
The best example of this cultural shift? New hires.
“In the first phishing campaign received by a new employee, results are consistent across the board, which makes sense, as they’re all onboarding. But right after that, we see immediate improvement. Behaviors change, and they quickly rise to the top performance tiers.”
Onboarding campaigns now play a crucial role in accelerating security awareness. New employees instantly understand they’ve joined a company that takes cybersecurity seriously, and they quickly align with the organization’s standard level of vigilance.
