HackerOne - HackerOne provides a platform designed to streamline vulnerability coordination and bug bounty program by enlisting hackers.
HostedScan.com - Online vulnerability scanner for servers, networks, and web applications.
Acunetix - Audit your website security and web applications for SQL injection, Cross site scripting and other...
HackerTarget.com - Security Vulnerability Scanning based on Open Source Tools.
Forcepoint Web Security Suite - Internet Security
Intruder - Intruder is a security monitoring platform for internet-facing systems.