https://www.hackerone.com/

HackerOne is the #1 hacker-powered security platform, helping organizations find and fix critical vulnerabilities before they can be exploited. More Fortune 500 and Forbes Global 1000 companies trust HackerOne than any other hacker-powered security alternative. The U.S. Department of Defense, General Motors, Google, Nintendo, Lufthansa, Starbucks, Intel, and over 1,200 other organizations have partnered with HackerOne to resolve over 86,000 vulnerabilities and award over $40M in bug bounties.