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Halcyon
The cyber resilience platform built to defeat ransomware
Austin, United States · Founded 2021 · $211.0M raised
- Headquarters
- Austin
- Employees
- 201–500
- Founded
- 2021
- Business Model
- B2B
- Website
- halcyon.ai
- Total Funding
- $211.0M
- Last Round
- $21.0M Series AMar 2026
- Rounds
- 4
About
Halcyon is a cybersecurity company building the industry's first dedicated anti-ransomware platform for enterprises. The Halcyon platform uses multiple AI and behavioral engines to proactively prevent ransomware execution, capture encryption keys during attacks to enable automated decryption, and provide rapid data recovery — minimizing business downtime. Beyond the software platform, Halcyon operates a 24/7 ransomware Security Operations Center (SOC) and backs its product with a ransomware warranty. Founded in 2021 by Jon Miller and Ryan Smith, Halcyon is headquartered in Austin, Texas and serves Global 2000 companies across sectors including manufacturing, healthcare, education, and financial services. The company has raised significant funding and reached a $1 billion valuation.
Summary
Halcyon is a Cybersecurity company based in Austin, United States, founded in 2021. It has raised $211.0M in total across 4 rounds, most recently a $21.0M Series A round in Mar 2026.
Tech & App Stack
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Funding History
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Mar 2026
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Series A — per-round amounts, valuations, and who invested in each round.
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