Holiseum

Holiseum is a cybersecurity firm focused on enhancing security measures for critical infrastructures and industrial environments through innovative solutions and comprehensive training programs. Holiseum was founded in 2018 and operates out of Paris, France, specializing in cybersecurity solutions. The company has executed a total of 1 deal, with its most recent deal occurring on March 20, 2025. The founder's history is not specified, and there are no mentions of significant pivots or corporate structure changes.

Holiseum specializes in providing innovative cybersecurity solutions tailored for critical infrastructures and industrial environments. Their core offerings include comprehensive consulting services, specialized training programs for IT teams, and the "Tir à Blanc de Ransomware®" simulation exercise, designed to educate organizations on ransomware threats and response strategies. These products aim to enhance the cybersecurity posture of companies across various sectors, including industrial manufacturing, critical infrastructure, and public services. Holiseum's training initiatives target a broad clientele, including IT departments, Chief Information Security Officers (CISOs), and innovation teams within enterprises, equipping them with essential knowledge in key technologies such as Blockchain, AI, Quantum Computing, IoT, and Software-Defined Radio.

Their services are offered in multiple regions, including France, where they are recognized by the Union of Public Procurement Groups (UGAP) and aligned with national security initiatives like the Paris 2024 Olympic Games. Holiseum generates revenue primarily through the provision of consulting services, targeted training programs, and specialized cybersecurity simulations. The company engages in a B2B transaction structure, collaborating directly with businesses seeking to enhance their cybersecurity frameworks. Clients engage Holiseum for tailored services, which may involve contractual agreements for specific training sessions or consulting projects.

Revenue is structured around service contracts that may include fixed fees for training workshops or ongoing consulting engagements. The flagship offering, "Tir à Blanc de Ransomware®," serves as a critical element in their service portfolio, generating interest from various sectors keen on implementing effective cybersecurity measures. In March 2025, Integrity360, a portfolio company of August Equity, acquired Holiseum, with financial terms undisclosed. This acquisition will enable Integrity360 to accelerate its growth in France and continental Europe.

Holiseum is expected to leverage this partnership to expand its market reach and enhance its service offerings within new markets, aligning with their strategic initiative.