HackenProof - Expert bug bounty and crowdsourced audit platfrom for crypto projects

HackerOne - HackerOne provides a platform designed to streamline vulnerability coordination and bug bounty program by enlisting hackers.

Hackrate - Our platform helps companies to identify software vulnerabilities in a cost-efficient way. It provides a secure and centralized view of ethical hacking projects for your company.

Bugcrowd - Harness the largest pool of curated and ranked security researchers to run the most efficient bug bounty and penetration tests