Halcyon
Halcyon is a cybersecurity firm that sells ransomware defense software, with 450 employees and $190M in total funding. It raised a Series C in late 2024 with backing from Bain Capital Ventures and Cisco.
The growth story
Halcyon grew from 36 to 450 employees between 2021 and 2026, raising $190M along the way, most recently a Series C in November 2024.
About
Halcyon makes software to detect and recover from ransomware attacks, which it claims can restore operations in minutes rather than weeks. Its tools target gaps left by general security products, focusing on human-led attacks that bypass traditional defenses.
The company has grown to 450 staff since its 2021 founding, with recent funding from enterprise-focused investors like Dell Technologies Capital. Its Series C suggests continued expansion in the high-demand ransomware protection market.
Founders and leadership
Sales is Halcyon's largest department with 72 employees, indicating a revenue-driven structure. Leadership likely emphasizes go-to-market execution given the investor mix and security industry norms.
The Halcyon org chart
Ryan Smith (CTO + Co-Founder) leads 56 mapped leaders with 8 direct reports. Click +N to expand a team; names link to the person’s public profile.
Departments, and which ones grew
Headcount by function: Sales 97 (+15% YoY), Engineering 70 (+30% YoY), Operations 46 (+12% YoY), Information Technology 42 (+31% YoY), Business Development 35 (+52% YoY), Marketing 16 (+7% YoY).
Talent flow
Nearly half of analyzed hires came from rival security firms like Palo Alto Networks (17) and Cylance (15). Alumni most often move to smaller cybersecurity startups, with Jazz and Arms Cyber as top destinations.
Most common previous employers of Halcyon staff: Palo Alto Networks (17), Cylance (15), SentinelOne (14), Automox (14), Carbon Black (14), Dell Technologies (11). Former Halcyon employees most often moved to Jazz (4), Palo Alto Networks (4), Arms Cyber (3), Morphisec (3), CrowdStrike (3), Censys (2).
Alumni worth knowing
The Halcyon mafia
Five alumni-founded companies exist, including Nexus (with 7 ex-Halcyon staff) and SixO3. This suggests some turnover but also entrepreneurial energy among departing employees.
5Luke Williams, was Sales Development Representative until 2025Mark Jurczak, was Regional Sales Director until 2024Kevin Wilson, was Senior Product Manager until 2026Parks H. Holt III, was Global Business Development until 2025Jim Martin, was Agility Leader until 2026Hiring now
Web traffic
Traffic mix: 32% direct, 57% search, 0% social, 3% paid.
What this company is made of
Most common skills at Halcyon: Leadership (125), Cybersecurity (119), Management (104), Sales (102), Security (100), Cloud Computing (93), Customer Service (87), Network Security (86).
Where the team actually sits
Halcyon people are concentrated in California, United States (28), Texas, United States (21), England, United Kingdom (11), Greater Boston (8).
Search footprint
Halcyon attracts about 4,250 organic search visits a month, traffic worth roughly $32K a month if bought through ads. It gained 717 ranking keywords and lost 467 in the last period.
What employees say
- Compensation
- 4.10 / 5
- Career opportunities
- 2.60 / 5
- Senior management
- 2.60 / 5
- Work-life balance
- 3.80 / 5
Frequently asked
Halcyon has 450 employees as of September 2026.
Halcyon has raised $190M in total, most recently a Series C round in November 2024.
Halcyon was founded in 2021 by Ryan Smith.
Ryan Smith (CTO + Co-Founder) sits at the top of Halcyon's reporting structure, with 8 direct reports.
The most common previous employers of current Halcyon staff are Palo Alto Networks (17 people), Cylance (15 people), SentinelOne (14 people).
Former Halcyon employees most often move to Jazz (4), Palo Alto Networks (4), Arms Cyber (3).
At least 5 companies have a founder who previously worked at Halcyon, including Nexus, SixO3, Guardian Risk Advisors.
Halcyon attracts about 4,250 organic search visits a month, worth roughly $32K a month in equivalent ad spend.
The most common skills among Halcyon staff are Leadership, Cybersecurity, Management, Sales, Security.
Halcyon staff are concentrated in California, United States (28), Texas, United States (21), England, United Kingdom (11).
Halcyon has about 97 people in Sales, up 15% over the past year, as of September 2026.
Halcyon has about 70 people in Engineering, up 30% over the past year, as of September 2026.
Computed from 225 current and 231 former Halcyon profiles, as of September 2026. Source: Crustdata.
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