AWS Certificate Manager vs Jetstack cert-manager [EOL] comparison

AWS Certificate Manager is a service that lets you easily provision, manage, and deploy public and private Secure Sockets Layer/Transport Layer Security (SSL/TLS) certificates for use with AWS services and your internal connected resources. SSL/TLS certificates are used to secure network communications and establish the identity of websites over the Internet as well as resources on private networks. AWS Certificate Manager removes the time-consuming manual process of purchasing, uploading, and renewing SSL/TLS certificates.

Automate certificate management in cloud native environments
cert-manager builds on top of Kubernetes, introducing certificate issuers and certificates as first-class resource types in the Kubernetes API. This makes it possible to provide ‘certificates as a service’ to developers working within your Kubernetes clusters.