Open Systems AG

Open Systems AG

Open Systems was founded in 1992 in Zurich by Hans Herlein, initially providing network integration services to Swiss enterprises. The company later pivoted to managed security, establishing a Security Operations Center (SOC) that today monitors traffic across more than 190 countries. Its wealth origin is not publicly attributed to any single family branch. Open Systems focuses on providing managed detection and response, firewall management, and SASE solutions. The firm serves clients in sectors such as finance, healthcare, and manufacturing, with confirmed customers including Swiss Post and Zurich Insurance (per public disclosures). Its geographic footprint spans headquarters in Zurich and an office in San Mateo, California. The company employs approximately 250 professionals and operates its SOC around the clock. In 2023, Open Systems announced a strategic expansion of its SASE platform (per the firm, 2023). No philanthropic vehicles or operating businesses are publicly linked to the entity beyond its core cybersecurity operations. A key structural differentiator: Open Systems has maintained independent ownership since inception, refusing outside capital from private equity or strategic acquirers. This governance model allows it to offer vendor-neutral security monitoring — it does not tie clients to a single hardware or cloud provider.