SafeBase - SafeBase is the interactive security portal to share your security posture, automate access to sensitive compliance information, and subscribe to vendor security program updates.

Federacy - Bug bounty and security testing platform.

Bounties Network - Complete tasks, earn crypto

Hacksy by Decoded - Check if your data has been leaked & get a better password

Boss - Github, now with bounties

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