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OpenBao
What it is
OpenBao is an open-source system for managing access to secrets and encryption, including API tokens, encryption keys, passwords, and certificates. Users operate it through a web UI, CLI, or HTTP API and deploy it themselves with packages, containers, binaries, source builds, or Helm for Kubernetes. OpenBao encrypts key/value secrets before storing them and can generate temporary credentials for Kubernetes and SQL databases, revoking them when leases expire. Leases can be renewed, and individual secrets or groups can be revoked. It can encrypt and decrypt data without retaining it, using centrally defined parameters. Authentication methods include GitHub, LDAP, and AppRole, with policies associated through tokens. Its storage security barrier uses AES-256-GCM and verifies authentication tags during decryption. High-availability configurations are supported. Installation documentation includes Linux, macOS, FreeBSD, and Windows options. Releases have GPG signatures, and SBOMs are available on GitHub Releases. Integrated Storage has a default maximum entry size of 1 MiB, configurable through max_entry_size.
For and against
For
- Free open-source software under MPL 2.0
- UI, CLI, and HTTP API access
- Dynamic secrets with lease-based revocation
- Supports high-availability configurations
- Kubernetes deployment through Helm
Against
- Self-managed deployment is required
- Integrated Storage defaults to a 1 MiB entry limit
- Storage backend control is outside the security model
- Memory analysis of a running instance is out of scope
The verdict
OpenBao combines secret storage, dynamic credentials, encryption, and policy-based authentication in a self-hosted system. Its operational boundaries and storage entry limit should be evaluated alongside deployment needs.
Who it suits
It suits organizations self-hosting credentials, encryption keys, and certificates across supported operating systems. Teams using Kubernetes, SQL databases, or listed authentication methods may find its deployment model relevant.
Plans and prices
OpenBao
Self-managed deployment · no vendor pricing or usage limits stated
Read 9 Oct 2026 · openbao.org
On the record
- Access methods
- Users can manage OpenBao through its UI, CLI, or HTTP API.openbao.org · read 9 Oct 2026
- Authentication
- OpenBao supports authentication methods including GitHub, LDAP, and AppRole, and associates authenticated clients with policies through tokens.openbao.org · read 9 Oct 2026
- Deployment
- OpenBao can be installed through package managers, container registries, precompiled binaries, source builds, or Helm for Kubernetes.openbao.org · read 9 Oct 2026
- Dynamic secrets
- OpenBao can generate secrets on demand for systems such as Kubernetes and SQL databases, then automatically revoke them when their lease expires.openbao.org · read 9 Oct 2026
- Encryption
- OpenBao can encrypt and decrypt data without storing it, using centrally defined encryption parameters.openbao.org · read 9 Oct 2026
- High availability
- OpenBao supports running in a highly available configuration to help preserve availability during failures.openbao.org · read 9 Oct 2026
- Integrations
- The project lists integrations including Sigstore for artifact signing, StackHPC for OpenStack, and Percona for database encryption key management.openbao.org · read 9 Oct 2026
- Leases and revocation
- Secrets have leases that can be renewed through built-in APIs, and OpenBao can revoke individual secrets or groups of secrets.openbao.org · read 9 Oct 2026
- Notable limit
- Integrated Storage has a default maximum entry size of 1 MiB, which can be configured through max_entry_size.openbao.org · read 9 Oct 2026
- Product
- OpenBao is an identity-based secrets and encryption management system for storing and controlling access to sensitive data such as API tokens, encryption keys, passwords, and certificates.openbao.org · read 9 Oct 2026
- Release security
- The download page says releases have GPG signatures and SBOMs are available on the GitHub Releases page.openbao.org · read 9 Oct 2026
- Secret storage
- OpenBao encrypts key/value secrets before writing them to persistent storage.openbao.org · read 9 Oct 2026
- Security
- OpenBao's security barrier encrypts data sent to storage with AES-256-GCM and verifies the authentication tag when decrypting.openbao.org · read 9 Oct 2026
- Security boundary
- The security model treats arbitrary control of the storage backend and memory analysis of a running instance as out of scope.openbao.org · read 9 Oct 2026
- Supported operating systems
- Installation documentation includes packages for Linux distributions, Homebrew for macOS, FreeBSD packages, and a Windows executable.openbao.org · read 9 Oct 2026
