Munich-based Arcos raised a EUR 5.5 million seed round announced Sept 18, 2026 to build cybersecurity for critical infrastructure and operational-technology systems. The deal was part of a mid-September wave in which most tracked rounds that day went to non-US startups across Europe and Asia.
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Munich's Arcos raises EUR 5.5M seed for critical-infrastructure security
Why this matters for founders
Security and OT-focused founders in Europe can use Arcos as a fresh comparable for seed-stage critical-infrastructure security valuations and investor appetite.
Source: Tech Startups
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