Synack
Penetration testing as a service with vetted researchers
Intigriti
Crowdsourced security testing with vetted ethical hackers
YesWeHack
Bug bounty and offensive security platform
Cobalt
Pentest as a service with a community of freelance pentesters
Immunefi
Web3 bug bounties and audit competitions
Digivante
Crowdtesting services for e-commerce and digital teams