Immunefi is a bug bounty platform focused on Web3 and smart contract security. They provide hosting, consultation, bug triaging, and program management services to blockchain and smart contract projects.

Code4rena is the web3 security auditing league. Security audit contests differ from traditional audits and bug bounties, offering protocols wider coverage and guaranteed payouts for participants. The players in the arena are: Wardens, who protect the DeFi ecosystem from threats by auditing code; Sponsors, who create prize pools to attract wardens to audit their project; Judges, who decide the severity, validity, and quality of findings and rate the performance of wardens.

DoraHacks is a global hacker movement and the world's most active multi-chain Web3 developer incentive platform. More than 2000 projects from the DoraHacks community have received over $21.5 million in grants and hackathon prizes. There are around 250,000 active users of DoraHacks.io worldwide. The platform offers hackathons, bounty, quadratic funding, privacy voting, and other community governance/funding toolkits. Additionally, over 40 major Web3 ecosystems are currently using Dora infrastructures to fund their open source communities.

BugRap is a Web3 bug bounty platform. Project teams can upload their projects and set bounties, and WhiteHat hackers in the community will be able to test the vulnerabilities of those projects. The BugRap security team will assist project teams to fix the vulnerabilities with WhiteHat hackers. BugRap will also act as a middleman in relation to the dispersal of rewards between the project team and the ethical hacker. The details of the vulnerabilities will be released with the consent of the project team.

AuditOne is an all-in-one audit & bug bounty platform, as the trust layer of multi-stakeholder world. Security, coverage and verification services in Web3.

Web3 Bounty is a cryptocurrency bounty platform designed to incentivize truth revelation and accelerate the recovery of stolen funds through decentralized justice.