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
CYREX - Web security vulnerability assessment & penetration testing
Axonius - Cyber security asset management to see and secure all
ThreatStream - Real-time intelligence to defend a network from cyber threat
Pearler - Pearler is a set of tools that help vendors avoid the pain of RFx and security questionnaires.