HackerOne - HackerOne provides a platform designed to streamline vulnerability coordination and bug bounty program by enlisting hackers.
HackenProof - The world trusted Bug Bounty Platform for crypto projects
SafeHats - Safehats is providing bug bounty and vulnerability disclosure services to enterprises.
Axonius - Cyber security asset management to see and secure all
YesWeHack - Global Bug Bounty & Vulnerability Management Platform
CYREX - Web security vulnerability assessment & penetration testing