Secrets Management: 19 Tools compared

Akeyless is a SaaS-based secrets management platform that uses a proprietary zero-knowledge encryption architecture called DFC (Distributed Fragments Cryptography). It provides centralized credential management, dynamic secrets, automatic rotation, and secure remote access across hybrid and multi-cloud environments.

Azure Key Vault is Microsoft's cloud service for securely storing and accessing secrets, keys, and certificates. It provides centralized secrets management with full control over access policies, and integrates deeply with Azure services and Active Directory.

cert-manager is a widely used Kubernetes controller for X.509 certificate management. It automates the issuance and renewal of certificates from Let's Encrypt, HashiCorp Vault, Venafi, AWS Private CA, Google CAS, and internal CA setups. cert-manager is a CNCF Graduated project originally built by Jetstack, and it's the go-to tool for any team running TLS on Kubernetes.

Delinea Secret Server is an enterprise privileged access management (PAM) solution that stores, controls, and audits access to privileged credentials. It provides automated password rotation, session monitoring, and compliance reporting for large organizations.

External Secrets Operator (ESO) is a Kubernetes operator that syncs secrets from external stores (AWS Secrets Manager, HashiCorp Vault, GCP Secret Manager, Azure Key Vault, 1Password, and many more) into native Kubernetes Secrets. It is the de facto standard for integrating external secret backends with Kubernetes workloads, with broad community adoption and graduated CNCF status.

HashiCorp Vault is a widely adopted open-source secrets management tool. It provides a unified interface for managing secrets, encrypting data in transit, and controlling access to sensitive information across distributed infrastructure. Vault supports dynamic secrets, leasing, and revocation.

Keeper Security is a zero-knowledge enterprise password management and secrets management platform designed for organizations with strict security and compliance requirements. It offers encrypted vault storage, dark web monitoring through BreachWatch, privileged access management, and robust admin controls. Keeper is SOC 2 and ISO 27001 certified and supports granular role-based policies for managing credentials across large teams.

Sealed Secrets is a Kubernetes controller from Bitnami that lets you store encrypted secrets directly in Git. You use the kubeseal CLI to encrypt a regular Kubernetes Secret into a SealedSecret custom resource, which only the controller running in your cluster can decrypt. This makes secret material safe to commit, review, and diff in version control without a separate secrets manager.

SPIFFE (Secure Production Identity Framework For Everyone) is a CNCF-graduated open standard for workload identity, and SPIRE is the reference implementation. Instead of giving workloads shared secrets, SPIRE issues short-lived, cryptographically verifiable identities (SVIDs) to each service, using attestation (where is this workload running, what image, what namespace) to prove who it is. SPIFFE is the foundation for zero-trust service-to-service authentication at companies like Bloomberg, Uber, and Square.