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Securing the online world against cyberattacks.

San Francisco, 27 January 2022 - GP Bullhound has led a $49 million investment round in HackerOne, the world’s most trusted hacker-powered security platform, in a Series E funding round. The funding brings total investment to date to nearly $160 million and will be used to invest in research and development, and expand go-to-market activities. Existing investors, including Benchmark, NEA, Dragoneer Investment Group and Valor Equity Partners, also participated in the round.

“With Log4j, ransomware, and nation-state attacks, governmental institutions have never been so exposed,” says Marten Mickos, CEO of HackerOne. “As attack surfaces grow, so does the gap between what digital assets organizations own and what they can protect. HackerOne is closing that gap and keeping its customers out of harm’s way in a way that no other mechanism can accomplish. In the past 12 months, we have identified over 17,000 high or critical vulnerabilities for our customers that could otherwise have been gaping holes for adversaries to enter through. To fuel our accelerating growth, we welcome GP Bullhound as our newest investor with their experience in supporting the most significant names in the global technology world.”

Per Roman, Managing Partner at GP Bullhound, said: “HackerOne is revolutionising the way in which companies reduce their risk of a breach. By leveraging the world’s biggest community of ethical hackers, who have the power and willingness to prevent cyberattacks, and coupling it with H1’s proprietary software, HackerOne is bringing a service to customers that no other vendor can match. GP Bullhound’s investment in this pioneering category leader is our contribution to securing the online world.”

The capital for this financing round was provided across GP Bullhound’s funds. Recent investments include Whoop, Patreon, DuckDuckGo, Discord, Revolut and Klarna among others.

For enquiries, please contact:
Hampus Hellermark, Principal, at

About GP Bullhound
GP Bullhound is a leading technology advisory and investment firm, providing transaction advice and capital to the world’s best entrepreneurs and founders. Founded in 1999 in London and Menlo Park, the firm today has 10 offices spanning Europe, the US and Asia. For more information, please visit

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