Keyfactor PKI as-a-Service is a cloud-based platform designed to manage machine identities and automate the lifecycle of digital certificates across hybrid and multi-cloud environments. It supports integration with private, public, and cloud-based certificate authorities, enabling organizations to discover, manage, and automate certificates from a single control plane. The service includes features such as certificate lifecycle automation, real-time CRL and OCSP infrastructure, secure storage of issuing CAs on FIPS-140 level 3 HSMs, and 24/7 monitoring. It also offers adaptable enrollment options, governance and compliance alignment, and expert-operated support, making it a scalable and adaptable solution for securing digital identities and transactions.