in november 2013, the company hosted a program encouraging the discovery and responsible disclosure of software bugs. microsoft and facebook funded the initiative, known as the internet bug bounty project. by june 2015, hackerone's bug bounty platform had identified approximately 10,000 vulnerabilities and paid researchers over $1 million in bounties. in september 2015, the company launched a vulnerability coordination maturity model, which then-policy chief katie moussouris described as “an important effort from hackerone to codify some reasonable minimum standards on how organizations handle incoming, unsolicited vulnerability reports.” in april 2017, the company announced 240% year-over-year customer growth in europe, and the subsequent opening of additional european offices to serve increasing customer demand.