Immunefi Boost, now known as Immunefi Audit Competitions, is a time-bound code review service that engages top-tier security researchers to identify vulnerabilities in blockchain systems, smart contracts, and decentralized applications. It provides real-time bug reporting and expert triaging, enabling projects to address issues promptly. Designed for use at critical development stages such as post-audit, testnet, or pre-mainnet launch, Boost offers a cost-effective solution compared to traditional audits. The service has proven successful with over 750 reports rewarded and significant payouts to security researchers.