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Open Systems AG
Open Systems is a Swiss cybersecurity firm founded in 1992, providing managed network security and SASE services to over 200 enterprises.
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.
General information
Firm type
Asset Manager
Year founded
1992
AUM
Undisclosed
Location
Region
Europe
Country
Switzerland
City
Zurich
Corporate office
Zurich, Switzerland
Additional offices
San Mateo, California, United States
Principals
Hans Herlein
Founder and Chairman
Rolf Hangartner
CEO
Sector focus
Frequently asked questions
Who runs investment decisions at Open Systems?
Open Systems is led by CEO Rolf Hangartner, who oversees day-to-day operations. Founder Hans Herlein serves as Chairman. The firm does not publicly disclose an investment committee or CIO structure, given its operating-company rather than investment-vehicle posture (per public record).
How does Open Systems source proprietary deal flow?
Open Systems does not operate as an investment firm. It sources clients through its owned sales team, channel partners, and a global network of system integrators. It does not deploy third-party capital or participate in venture-stage deal flow.
Is Open Systems structured as a single family office or does it operate more like a venture firm?
Open Systems is an operating company that delivers managed security services. It is not structured as a family office, venture capital firm, or asset manager. Its revenue comes from client subscriptions, not investment returns.
Does Open Systems participate in fund commitments or only direct deals?
Open Systems does not make fund commitments or direct equity investments. Its financial activity is limited to operating expenses and revenue from contracts with enterprise clients.
What investment stages does Open Systems typically target?
Open Systems does not target investment stages. The firm provides security services to established enterprises across multiple industries.
Which sectors does Open Systems explicitly avoid?
Open Systems does not publicly disclose sector avoidance criteria. Its client base includes finance, healthcare, and manufacturing, suggesting a broad industry approach.
How is Open Systems related to any parent or related vehicle?
Open Systems is privately held with no publicly disclosed parent company, family office affiliation, or investment spinout. It maintains independent ownership (per public record).
Profile maintained by Altss using OSINT (open-source intelligence), regulatory filings, licensed data partners, and verified direct submissions. Read the methodology. Last updated: . Continuous refresh with full update cycles at least every 30 days.
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