The top code signing tools today include DigiCert Code Signing, Sectigo, GlobalSign, AWS Signer, Keyfactor, SSL.com, Microsoft SignTool, SignPath, Thales Luna HSM, and ReSign.io, and they differ mainly in automation, security, and enterprise governance capabilities, where DigiCert, GlobalSign, and Keyfactor lead in certificate lifecycle management, secure HSM-backed key storage, compliance support, audit logging, and CI/CD integration for enterprise DevSecOps environments, while AWS Signer excels in cloud-native automated signing for AWS and IoT workloads. Sectigo and SSL.com are widely used for affordable multi-platform code signing with strong developer support, Microsoft SignTool remains a standard free utility for Windows-based software distribution, and SignPath focuses on modern automated cloud signing workflows integrated with GitHub Actions and Azure DevOps. Thales Luna specializes in hardware-based secure key protection for highly regulated industries, while ReSign.io targets mobile application signing and re-signing workflows. Overall, DigiCert and Keyfactor are best for enterprise-scale software distribution and compliance-heavy environments, AWS Signer and SignPath suit cloud-native DevOps pipelines, and Sectigo or SSL.com are ideal for startups and SMBs seeking affordable, easy-to-deploy code signing solutions.