Halcyon

Dedicated anti-ransomware layer stopping encryption and extortion that slips past EDR.

Halcyon runs alongside existing endpoint tools as a ransomware-specific defense layer, detecting and blocking encryption behavior, capturing keys to enable recovery when needed, and countering data extortion. It is built on the premise that general-purpose EDR misses ransomware tradecraft. The company was founded in 2017.

Category: Resilience & Ransomware
Founded: 2017
Funding: $190M raised (Series C, 2024)
Website: https://www.halcyon.ai

Seen at Black Hat USA 2026 (Silver Plus sponsor, booth 4915).

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