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Hack The Box: Online platform for ethical hacking and cybersecurity training with virtual machines, labs, and challenges for hands-on practice and upskilling.
Hack The Box, based in the UK with additional offices in Greece and the US, provides a gamified online platform for ethical hacking and cybersecurity training, simulating real-world cyber attacks for both individual learners and enterprise teams. The platform, operating on a freemium model, supports over 4.3 million community members and serves enterprise clients such as Jet.com and EY, enhancing their cyber resilience. The company has grown to over 180 employees and has secured substantial venture capital funding, including a $55 million Series B round led by Carlyle, with participation from firms like Marathon Venture Capital and Paladin Capital Group. Key leaders include President Gibb Witham and CPO Gerasimos Marketos. Hack The Box was founded in 2017 by Haris Pylarinos, James Hooker, and Aris Zikopoulos.
Hack The Box has raised $68.3M across 4 funding rounds.
Hack The Box has raised $68.3M in total across 4 funding rounds.
Hack The Box is the leading cybersecurity readiness and upskilling platform that combines gamified hands-on labs for offensive and defensive skills, AI-enhanced intelligence, and a global community to train individuals and teams.[1][2][5] It serves cybersecurity professionals, enterprises, governments, MSSPs, universities, and students by solving the "people problem" in security—translating budgets into high-performance teams amid rising cyber threats like a 600% year-over-year increase in cybercrime—through practical simulations, certifications, talent sourcing, and continuous learning.[2][4][5] With over 4.3 million members, 1.5k+ organizations trained, 742 training labs, and rapid growth to 260+ employees, it drives cyber workforce development and operational readiness.[2][4]
Hack The Box launched in 2017, founded by Haris Pylarinos (CEO), who brought 15+ years in cybersecurity, systems engineering, networking, and software architecture to disrupt training with a gamified, community-driven platform.[1][2][4] The idea emerged from Pylarinos's vision to connect and upskill the global cybersecurity community via holistic 360° workforce development, assessment, and recruitment, addressing gaps in traditional methods.[4] Early traction came from its offensive security labs and challenges, evolving into a full ecosystem with defensive training, AI tools, and enterprise solutions; pivotal moments include scaling to 3.7-4.3 million members and trust from major clients like PUMA, Siemens, NortonLifeLock, and Dassault Systèmes.[1][2][5]
Hack The Box rides the explosive growth in cybersecurity demands, fueled by escalating threats (e.g., 600% cybercrime surge) and a chronic skills shortage, positioning it as a pillar for building "attack-ready" workforces.[2][4][5] Timing is ideal amid rising investments in human-centric security over tech alone, with market forces like regulatory pressures and AI-driven attacks favoring platforms that deliver measurable performance via simulations and talent pipelines.[4] It influences the ecosystem by fostering the world's largest hacking community, enabling ethical hacker development, corporate vulnerability assessments, and industry events that drive collaboration and innovation.[1][3]
Hack The Box is poised to dominate cyber upskilling as threats evolve with AI and quantum risks, expanding its Cyber Performance Center for deeper business-aligned metrics and global talent sourcing.[2][4] Trends like "grow-together" cultures, gamified learning, and 360° training will propel growth, potentially doubling its user base and enterprise footprint while influencing standards in resilience. Its community-first model will solidify it as indispensable, empowering teams to outpace adversaries and tying back to its core mission of making hacking the new gaming for a safer digital world.[2]
Hack The Box has raised $68.3M in total across 4 funding rounds.
Hack The Box's investors include Marathon Venture Capital, Paladin Capital Group, Brighteye Ventures, Constantin Boye, Endeavor Catalyst, Osage University Partners, 11.2 Capital, AllegisCyber Capital, Connect Ventures, Grotech Ventures, Scale Venture Partners, Seedcamp.
Hack The Box has raised $68.3M across 4 funding rounds. Most recently, it raised $55.0M Series B in January 2023.
| Date | Round | Lead Investors | Other Investors |
|---|---|---|---|
| Jan 1, 2023 | $55.0M Series B | Marathon Venture Capital, Paladin Capital Group, Brighteye Ventures, Constantin Boye, Endeavor Catalyst, Osage University Partners | 11.2 Capital, AllegisCyber Capital, Connect Ventures, Grotech Ventures, Scale Venture Partners, Seedcamp, SYN Ventures, WestCap |
| Apr 1, 2021 | $11.0M Series A | Paladin Capital Group | 11.2 Capital, AllegisCyber Capital, Connect Ventures, Grotech Ventures, Marathon Venture Capital, Scale Venture Partners, Seedcamp, SYN Ventures, WestCap, Brighteye Ventures, Osage University Partners |
| Apr 1, 2019 | $1.3M Other Equity | George Tziralis | |
| Apr 1, 2019 | $1.0M Seed | Connect Ventures, Marathon Venture Capital, Pioneer Fund, Seedcamp, Georges Harik |