Nessus
Qualys
Intruder
Acunetix
AlienVault USM (from AT&T Cybersecurity)
Burp Suite
BoxCryptor
Cloudfogger
Hackrate
HackerOne
YesWeHack
Bugcrowd
Intigriti
Open Bug Bounty
OpenAlternative
Data Protocol
NessusQualys - Qualys helps your business automate the full spectrum of auditing, compliance and protection of your IT systems and web applications.
HackerOne - HackerOne provides a platform designed to streamline vulnerability coordination and bug bounty program by enlisting hackers.
Intruder - Intruder is a security monitoring platform for internet-facing systems.
YesWeHack - Global Bug Bounty & Vulnerability Management Platform
Acunetix - Audit your website security and web applications for SQL injection, Cross site scripting and other...
Bugcrowd - Harness the largest pool of curated and ranked security researchers to run the most efficient bug bounty and penetration tests