Hack Box

Hack The Box is a cybersecurity company founded in 2017 by Haris Pylarinos, James Hooker, and Aris Zikopoulos, with a presence in the UK and Greece. It has grown into one of the largest hacking communities globally, with over 1.7 million users. The company aims to address the shortage of skilled cybersecurity professionals through an innovative, gamified platform that offers hands-on penetration testing and training. The platform provides an engaging learning environment where users can hack into virtual machines and solve challenges of varying difficulty. Hack The Box features a dedicated content team that creates tailored challenges and labs for different skill levels, as well as Capture The Flag (CTF) events to simulate real-world scenarios. The company also offers custom training solutions for over 1,500 organizations, helping them enhance their cybersecurity capabilities. With significant funding and a growing team of over 100 employees, Hack The Box is committed to building a community of skilled ethical hackers and supporting organizations in strengthening their cyber defenses.

Computer & Network Security Folkestone, United Kingdom Founded 2017 ~1,331 employees Private · Series B

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Employees
1,331
+0.6% in the 3 months to Sep 2026
Annual revenue
~$3M
Total funding
$66.9M
Last round Series B, Jan 2023
12-month attrition
8.8%
Tech: 6.6%
H1B sponsor
NA
Open jobs
6
Last 30 days

Headcount trend

Hack Box went from 1,108 employees in Oct 2024 to 1,331 in Sep 2026. Apr to Sep 2026: 43 people joined, 24 left.

Org structure

Headcount by department

Other1,177
Engineering51
Sales30
Marketing29
Operations21
Success19
Design3
Finance1

Funding

  • Jan 2023 · Series B · $55M · Carlyle, Paladin Capital Group, Osage University Partners
  • Apr 2021 · Series A · $10.6M · Paladin Capital Group, Osage University Partners, Brighteye Ventures
  • Apr 2019 · Seed · $1.3M

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Data from Company Prospectus, DOL LCA disclosures, WARN notices and 6figr salary profiles.