Halcyon Closes $40M Series B with Bain Capital Ventures

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Designed from the Ground-up to Defeat Ransomware

Augment and protect your existing security products with the Halcyon Anti-Ransomware and CyberResilience Platform.

Technical Features


Modern SOC teams need products that integrate into their workflows, not another console. Halcyon is an API-first security platform (but we have a great web console too!)

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We’ve built a series of machine learning engines trained entirely on ransomware to make highly accurate decisions in near-real time. Instead of simply looking at a binary, Halcyon observes the context and behavior of the entire sytem.

Multiple Protection Layers

Halcyon combines pre-execution defense with deception and anti-detonation techniques to block new ransomware before it executes. In the event our engine does not detect it immediately, Halcyon isolates the impacted node.

Lightweight & Conflict Free

Our agent is lightweight and built to run alongside your existing NGAV/EPP/XDR solution without issue. Halcyon is tested to work along side Crowdstrike, SentinelOne and Windows Defender.

Supported Systems

Windows Server: 2012 R2, 2016, 2019, 2022
Windows 10 & 11

Future Support

Linux (Debian, Ubuntu)
MacOS (El Capitan+)
Other legacy Windows by request

Here's How It Works

Ransomware protection requires multiple layers of defense, the risk of letting ransomware run rampant through an organization is too large to leave to a single AI or behavioral model. Halcyon uses several unique layers to stop the process of ransomware from completing its task, if a single layer fails Halcyon is able to respond accordingly. Even the best defenses can be breached by a persistent actor which is why Halcyon designed an autonomous isolation and recovery layer is a last resort to prevent the spread of ransomware across your company.


Ransomware Attempts to Execute

Deconfliction Checks

Owns the Asset

Completes Execution

Defense Layer

Defense Layer

Behavioral &
Deception Defense

Recovery or
Autonomous Isolation


The Halcyon Platform

Halcyon is the industry’s first dedicated, adaptive security platform focused specifically on stopping ransomware attacks. Halcyon is built by attackers to stop attackers. The solution is a lightweight agent that combines multiple proprietary advanced prevention engines along with AI models trained solely on ransomware.

Interested in getting a demo? Fill out the form and let’s talk!

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Meet with a Halcyon Anti-Ransomware Expert

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