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
Testeum
Crowdtesting platform for software, websites and mobile apps
99tests
Crowdsourced manual testing on real devices