IDECSI is a French cybersecurity company founded in 2011 that specializes in corporate data protection. The company develops solutions focused on protecting Microsoft 365 environments, messaging systems, collaboration applications, and on-premises infrastructures. Their flagship product, MyDataSecurity, functions as an individual security assistant for employees, monitoring professional digital environments continuously and alerting users when accounts are compromised.

The company offers a SaaS-based platform that ranges from securing VIP mailboxes to supporting cloud environments. IDECSI's approach emphasizes user-centered technology that enables collective protection across organizations, encouraging participation and collaboration from all employees rather than relying solely on security teams. They also offer MyDataManagement, a solution designed to clean up obsolete, unused, and voluminous data.

IDECSI won the Innovation Award at the Assises de la Sécurité symposium in 2014 and has achieved a Cybervadis evaluation score of 825/1000. The company maintains offices in Paris and London and serves over one hundred clients across the United Kingdom, United States, France, Belgium, and Luxembourg, including many CAC 40 and Fortune 500 companies such as SNCF, ADP Group, and FORVIA. Their R&D center in France develops technology aimed at addressing data protection challenges in the context of digital transformation.