Choose a self-hosted secrets manager by matching its secret-handling features, identity integrations, and recovery model to your workloads—and by confirming your team can operate it safely. Before committing, define what secrets it must manage, how applications will retrieve and refresh them, what happens during an outage, and how you will restore access after a failure.
What do you need the manager to do?
Start with the work, not the product name. Inventory the secrets and systems involved, then decide which capabilities are requirements and which would add complexity without solving a real need.
- Static secrets: Store and control access to values such as API keys or configuration credentials.
- Dynamic credentials: Issue credentials for a limited period, then renew or revoke them. Check whether the target system is supported and how expired credentials are cleaned up.
- Certificates and PKI: Create, distribute, renew, or revoke certificates if your workloads need managed certificate lifecycles.
- Encryption services: Let applications request cryptographic operations without giving them direct access to the underlying key material.
- Other specialized functions: Check whether requirements such as TOTP or third-party secret integrations are supported in the exact release and edition you plan to run.
HashiCorp Vault documents separate secret engines for functions including key/value storage, dynamic credentials, certificates, and encryption-as-a-service. That breadth may be useful when several needs belong in one system, but it is not a reason to adopt capabilities you do not need.
Can your identities and applications use it safely?
Map both human users and workloads to the manager. A product is not a fit just because it supports a login method: confirm that the required identity provider and workload authentication method are supported for your deployment, and test the permissions they produce.
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#1 Best Overall
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- Authentication: Identify how operators, developers, services, CI/CD jobs, and orchestrated workloads will prove their identities.
- Authorization: Verify that policies can restrict access by secret, path, project, environment, and action. Test an allowed request and a deliberately denied one for each representative role.
- Delivery: Decide whether applications will use an API, SDK, CLI, agent, operator, CSI integration, or synchronized Kubernetes Secret. Check how credentials reach the process and what happens when a value changes.
- Rotation and revocation: Confirm that a rotation reaches the workload and that the application reloads or reconnects correctly. For leased credentials, test renewal, expiry, revocation, and cleanup in the target system.
Vault documents token- and policy-based access, including a default-deny policy model. OpenBao describes identity-based ACLs, leases, renewal, and revocation. Verify the actual policy semantics and integrations for any product and version under consideration rather than assuming similar terminology means equivalent behavior.
Which self-hosted approach fits your team?
The products below take different approaches. The descriptions summarize their official materials, not independent comparative testing; confirm current features, release maturity, deployment requirements, license terms, and support arrangements before choosing.
Rank #2
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| Option | What its official materials describe | What to validate |
|---|---|---|
| HashiCorp Vault | A modular system with authentication methods and policies, secret engines, audit logging, and workload integrations. For Kubernetes, HashiCorp documents development, standalone, high-availability, and external-server patterns, plus an operator, CSI provider, and Agent Injector. | Choose the needed deployment and storage architecture; validate the required integrations and operational skills. HashiCorp’s “What is Vault?” documentation cautions that Vault can be overwhelming for simple or limited secret-management needs. |
| OpenBao | The project describes itself as an open-source, community-driven secrets manager and Vault fork managed by the Linux Foundation’s OpenSSF. Its site describes encrypted key/value storage, dynamic secrets for some systems, lease expiry and revocation, and centralized encryption services. | Confirm the exact release, required feature support, migration needs, and available support. The project description alone does not establish feature parity, migration compatibility, or a support guarantee. |
| Infisical | Its product page presents a developer-facing platform for centralizing and delivering secrets, with features it says include environment separation, role-based access, temporary grants, audit logs, scheduled rotation, CLI/SDK/dashboard access, integrations, a Kubernetes operator, and self-hosting through Docker or Kubernetes. | Check which features are available in the self-hosted edition and the version you will deploy. A vendor feature list is not a substitute for deployment documentation, release notes, license terms, and support terms. |
Can you operate, secure, and recover it?
Self-hosting makes your organization responsible for the service’s deployment, storage, upgrades, key handling, backups, availability, and monitoring. Treat those duties as selection criteria: a powerful manager is a poor fit if nobody owns its routine operation or its failure response.
Storage and availability
Check the supported storage backends and their failure behavior. HashiCorp’s storage documentation says integrated storage supports backup/restore and high availability, file storage does not support high availability, and in-memory storage is intended for development and experimentation; the page recommends integrated storage for most deployments. Confirm those details against the release and architecture you intend to use, including what happens if a node, storage system, network, or zone fails.
Rank #3
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Keys, unsealing, and recovery
Document how the service is unsealed or obtains access to its encryption keys, who controls the relevant shares or KMS/HSM permissions, and how recovery works if those dependencies are unavailable. Keep the decryption key or key-encryption-key recovery path separate from the only copy of encrypted data. Test recovery in a clean environment rather than treating a successful backup job as proof that restoration will work.
Audit and monitoring
Decide which reads, writes, denied requests, and administrative changes must be recorded, where logs will be stored, and who responds to alerts. Where feasible, forward audit records to a durable destination protected separately from the secrets manager. Vault’s security documentation says that when audit logging is enabled, requests and responses must be logged before secret material is returned to a client; its threat model also excludes arbitrary control of the storage backend, so the backend and its backups still need protection.
Rank #4
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Ownership and governance
Assign named owners for patching, release review, access changes, key rotation, capacity monitoring, restore tests, and incident response. Check the exact license, edition restrictions, support arrangements, and paid-feature boundaries against current official terms; they can change and should not be inferred from a feature overview.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Are Kubernetes Secrets encrypted at rest?
Not by default: Kubernetes documentation says Secret objects are stored unencrypted in etcd unless encryption at rest is configured. Base64 encoding is not encryption. Kubernetes recommends configuring encryption at rest and limiting access to Secret objects.
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Encryption configuration introduces key-management and recovery responsibilities. The Kubernetes encryption guide covers provider configuration, key rotation, and migration of existing stored objects. It warns that if configured keys cannot decrypt a resource and a working configuration cannot be restored, the resource may need to be deleted directly from etcd. Local encryption keys can be exposed by a host compromise; using an external KMS instead adds a dependency on that service’s availability and recovery.
Kubernetes guidance also describes using an external secret store with a Secrets Store CSI provider to mount selected secrets into authorized Pods. Decide whether an application should retrieve values directly, receive them through a CSI integration, or use synchronized native Secret objects. The right delivery path depends on your workloads and their exposure and update requirements.
How should you test your shortlist?
Run a proof of concept with the intended edition, version, storage backend, and deployment pattern. Use a representative application and identity setup; a demonstration that only writes and reads one secret does not exercise the operating risks that matter.
- Configure identities and policies. Test an application identity, an operator, and an auditor. Confirm each can perform its intended tasks and is denied access outside its scope.
- Exercise the secret lifecycle. Test the required static or dynamic secret workflow, including rotation, application reload, renewal, expiry, and revocation where applicable.
- Test logging. Verify that expected access and administrative events reach the intended audit destination, and observe what happens if log delivery fails.
- Simulate service dependencies failing. Restart the manager and test the relevant unseal, storage, network, quorum, or external KMS dependency. Observe whether applications fail safely and how operators restore service.
- Restore a backup. Recover into a clean environment using the documented keys and procedures. Confirm that authorized workloads can access the restored data and that unauthorized identities remain blocked.
Record the results as operational requirements, not just setup notes: who performs each recovery step, which dependencies must be available, and what the application does while the manager cannot be reached.
Quick Recap
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