Hack The Box is a cybersecurity education and training platform, headquartered in Folkestone, United Kingdom, founded in 2017.
| Date | Round | Amount | Investors |
|---|---|---|---|
| 2023-01-09 | Series B | $55M | The Carlyle Group |
| 2021-04-12 | Series A | $10.6M | Paladin Capital Group, Brighteye Ventures, OUP (Osage University Partners), Marathon Venture Capital |
| 2020-01-04 | Seed | $2.6M | Marathon Venture Capital |
| 2019-04-02 | Seed | $1.3M | Marathon Venture Capital |
| Date | Company | Amount |
|---|---|---|
| 2025-09-16 | LetsDefend | Undisclosed |
Data from The Signal by Return on Security — cybersecurity funding, M&A activity, and company intelligence.