cert-manager vs Entrust Certificate Manager

cert-manager is a free, open-source tool for obtaining and managing X.509 certificates on Kubernetes and OpenShift. It requests certificates from public or private issuers, keeps them valid, and attempts renewal before expiration. The project automates TLS certificate issuance for Kubernetes Ingress and supports private-PKI certificates for pod-to-pod mutual TLS. Documented authority options include Let’s Encrypt, HashiCorp Vault, CyberArk Certificate Manager, and private PKI. Installation can use kubectl-applied manifests, Helm, Flux, or Argo CD. Related projects include istio-csr, approver-policy, Kubernetes CSI drivers, csi-driver-spiffe, and trust-manager; trust-manager distributes X.509 trust bundles and can run independently. cert-manager publishes threat-model and hardening guidance covering secrets, RBAC, networking, and Kubernetes configuration. Its default Helm values prioritize installation ease and backward compatibility over hardened production security. The project has no LTS releases, though each release is supported until the second subsequent version.

Entrust Certificate Manager centralizes discovery and lifecycle management for digital certificates, from audit and issuance through renewal and revocation. It can find certificates across networks, cloud environments, and CA repositories, then provide continuous monitoring, reports, and alerts. Policy-driven workflows automate lifecycle steps, and certificates from Entrust and third-party CAs can be managed through one control point. Entrust describes deployment across on-premises, private cloud, and public cloud environments. Integration choices include cloud, automation, CA gateway, enrollment protocol, secrets management, and custom REST APIs. The API can query certificates by metadata, import certificates, and update custom-field metadata, subject to token permissions. Compatibility information lists PostgreSQL 15 or higher, OpenID Connect 1.0, LDAP v3, and other specified components. Entrust says the product supports crypto-agility and post-quantum readiness. Pricing is on request, and there is no free plan. Entrust was founded in 1969 and is headquartered in Minneapolis, Minnesota.