Halcyon
Halcyon is a cybersecurity company purpose-built for ransomware prevention. Unlike general EDR tools, Halcyon specifically trains its AI on ransomware behaviors, prevents encryption before it starts, and ensures business continuity even during an active attack.
- Location
- Austin, USA
- Raised
- $180M
- Stage
- Series C
- Founded
- 2021
- Category
- Dev Tools
- Funding
- VC-backed
- Team
- 200-500
Funding figures as of Jul 2025 · not independently verified
Founders of Halcyon
- Jon Miller
- Ryan Smith
Investors backing Halcyon
- SYN Ventures
- Dell Technologies Capital
Frequently asked questions
What does Halcyon do?
Halcyon is a cybersecurity company purpose-built for ransomware prevention. Unlike general EDR tools, Halcyon specifically trains its AI on ransomware behaviors, prevents encryption before it starts, and ensures business continuity even during an active attack.
Where is Halcyon based?
Halcyon is based in Austin, USA.
When was Halcyon founded?
Halcyon was founded in 2021.
How much has Halcyon raised?
Halcyon has raised $180M in their Series C round as of Jul 2025.
Who founded Halcyon?
Halcyon was founded by Jon Miller, Ryan Smith.
Who has invested in Halcyon?
Halcyon is backed by SYN Ventures, Dell Technologies Capital.
How Halcyon would pitch themselves
○ Auto-generated01Target customer
Software engineers + DevOps teams shipping production systems — from indie hackers to enterprise platform teams at scale.
02Problem they solve
Halcyon is a cybersecurity company purpose-built for ransomware prevention. Unlike general EDR tools, Halcyon specifically trains its AI on ransomware behaviors, prevents encryption before it starts, and ensures busines… The category has historically been served by tools that miss the modern workflow this product is built around.
03Key differentiator
Halcyon differentiates on the only platform purpose-built to defeat ransomware. Backed by SYN Ventures + Dell Technologies Capital, $180M raised — the company has resources + validation to compound this thesis. Founded by Jon Miller + team.
04Go-to-market strategy
Growth-stage GTM — multi-channel revenue motion (direct enterprise sales, channel partnerships, marketplace listings). Vertical specialisation + verticalised AE teams targeting enterprise + mid-market.