HackerOne is the most well-known and recognized Bug Bounty brand in the world. HackerOne has a solid portfolio of security certifications, including ISO 27001 and FedRAMP authorization. BugCrowd is famous for hosting Bug Bounty programs for such industry giants as Amazon, VISA, and eBay, as well as the venerated (ISC).. cybersecurity education association. OpenBugBounty is the only non-for-profit vulnerability disclosure and Bug Bounty project on our list. YesWeHack is the rising star of our European Bug Bounty rating for 2021.
Source: https://thehackernews.com/2021/02/top-5-bug-bounty-programs-to-watch-in.html