1. CertiK - CertiK Attracts substantial investment for its code auditing and verification solutions. The platform is renowned for its rigorous auditing process and high accuracy, making it a favorite in the blockchain community.
2. Trail of Bits - A leading security research and engineering firm known for its deep expertise in blockchain technology and security. Their audits not only focus on the code but also on the overall architecture of the system.
3. Quantstamp - The first audit firm to audit an ICO (Initial Coin Offering), Quantstamp has built a reputation for thoroughness and a detailed report process.
4. SlowMist - A Chinese blockchain security company, SlowMist provides not only code auditing services but also incident response and monitoring, making it a comprehensive solution provider.
5. OpenZeppelin - Known for their library of reusable smart contract components, they also offer auditing services to ensure the security of the smart contracts deployed using their framework.