Halcyon
Ransomware will come for your business. Halcyon makes sure it doesn't win. Ransomware has evolved into a human-led operation, with real attackers using AI-powered tools to evade your defenses, destroy your backups, and shut your business down. Halcyon adds a ransomware-native defense layer that catches what generalist tools were never designed to stop, across every stage of the attack chain. And when something gets through, we recover in minutes, not weeks. Turning what could have been a business-ending event into a non-event.
Halcyon is a computer and network security company headquartered in San Diego, California, United States. The team counts 450 people, up 24% over the last year. Halcyon has 4 open roles right now and a website drawing 103K monthly visits.
Employee growth
Halcyon grew from ~36 employees in September 2021 to 162 by April 2024, reaching 450 by August 2026, tracked weekly in Crustdata's proprietary dataset since September 2021.
Capital raised
Halcyon has raised $190M across 4 rounds since 2023 - from a $6M Debt Financing to a $100M Series C - most recently 631 days ago.
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In November 2024, Halcyon raised $100M in a Series C round led by Evolution Equity Partners, with Cisco Investments, SYN Ventures, ServiceNow Ventures, N47, and Harmony Partners participating.
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In December 2023, Halcyon raised $40M in a Series B round led by Bain Capital Ventures.
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In April 2023, Halcyon raised $6M in a Debt Financing round.
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In April 2023, Halcyon raised $44M in a Series A round led by SYN Ventures, with Corner Ventures, Washington Harbour Partners, Gula Tech Adventures, Founders Fund, and DNX Ventures participating.
Investors
Halcyon's 17 backers include leading firms such as SYN Ventures, Cisco Investments, Evolution Equity Partners, and Corner Ventures.
Leadership
Halcyon's leadership includes Chief Customer Officer Ryan Schultz, Chief Security Officer Tony Spinelli, CTO + Co-Founder Ryan Smith, and Chief Revenue Officer (CRO) Jeff StClair.
Industries & markets
Halcyon is classified across the following industries, categories, and markets that Crustdata tracks for competitive analysis and sector benchmarking.
See the top Computer and Network Security companies ranked by size, growth and funding.
In the news
Halcyon has been featured in recent press coverage that Crustdata tracks to surface signals on launches, fundraising, partnerships, and other newsworthy events.
- The Horsemen of AI Are Advancing. Are Your Defenses?
- Halcyon Launches File Resilience, Preventing Ransomware Encryption Before It Starts
- Beazley Security and Halcyon Launch Cyber Resilience Retainer to Transform Cyber Crisis Preparedness and Recovery
- Citizen Release Brand New Single ‘I Can See You From Here’ Ahead of New Album ‘Halcyon Blues’
Open positions
Halcyon has 4 open roles, 100% based in the US; product and sales are the most-hired functions.
Halcyon is hiring for 4 roles in United States, mostly in product.
Offices
Halcyon operates 1 office across 1 country, with major offices in TX.
Halcyon Growth Score
Halcyon has a Crustdata Growth Score of 24 out of 100, which points to modest growth. Behind the number: headcount grew 24% year over year, web traffic fell 11% quarter over quarter, 4 roles are open, and it last raised funding 21 months ago.
Halcyon FAQs
Below are 11 of the most common questions about Halcyon, answered with data tracked and refreshed weekly using Crustdata's proprietary dataset.