Bugcrowd - Harness the largest pool of curated and ranked security researchers to run the most efficient bug bounty and penetration tests
HackenProof - The world trusted Bug Bounty Platform for crypto projects
Testbirds - Testbirds is a crowdtesting platform with a community of 100,000 testers
CYREX - Web security vulnerability assessment & penetration testing
Cobalt - CAD and 3D modeling software for Mac and Windows.
Cyberdesic - Cybersecurity professionals, on demand