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OpenBao

Identity and Access Management (IAM)

Open Source
Self-hosted
E
Enterprise
OpenMSP Score
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N/A
Reddit Impact Score
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449Forks
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Mozilla Public License 2.0License
May 20, 2026Last commit

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OpenBao is an open-source secrets, certificate, and key management platform forked from HashiCorp Vault. It was created after HashiCorp relicensed Vault under the Business Source License in August 2023; community members forked the last MPL-licensed Vault codebase in December 2023, and the project joined the Linux Foundation, reaching a stable 2.0 release around April 2024. Governance is vendor-neutral, with maintainers from SAP, GitLab, ControlPlane, Adfinis, IBM, and others rather than a single controlling company. OpenBao centralizes sensitive data behind a unified API and ACL/policy system: it encrypts key-value secrets before persisting them, issues dynamic short-lived credentials for databases and cloud providers, provides "encryption as a service" via its Transit engine, and offers a full PKI engine for certificate issuance and rotation. It has also added KMIP server support and open-sourced namespaces (multi-tenant isolation) - a feature Vault keeps enterprise-only. OpenBao is licensed under the Mozilla Public License 2.0 (MPL-2.0), a genuine OSI-approved open-source license. Adoption is growing among privacy- and cost-conscious organizations (NVIDIA has been reported as an adopter), with an active GitHub community and roughly monthly releases.
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Key Features

Dynamic Secrets

Generates short-lived, on-demand credentials for databases, cloud providers, and other systems, auto-revoked at lease expiry.

KV Secrets Engine

Encrypted key-value secret storage with versioning, mounted at arbitrary paths.

PKI Secrets Engine

Issues and manages X.509 certificates, acting as an internal or intermediate CA with automated rotation.

Transit (Encryption as a Service)

Encrypts/decrypts/signs application data centrally without OpenBao ever storing the plaintext or ciphertext.

KMIP Secrets Engine

Acts as a KMIP server so KMIP-compliant devices/appliances can manage keys through OpenBao.

Open-Source Namespaces

Secure multi-tenancy with tenant isolation and delegated administration, included free unlike Vault where this is enterprise-only.

Pros and Cons

Pros

Fully Open Source, No BUSL Risk

MPL-2.0 licensed with no source-available restrictions or future relicensing threat from a single vendor.

Enterprise Features Included Free

Namespaces/multi-tenancy and KMIP, which are paywalled in Vault, ship in the open-source build.

Vault API/Workflow Compatibility

Close API and CLI parity with Vault eases migration for teams already using Vault tooling and Terraform providers.

Vendor-Neutral Governance

Linux Foundation stewardship with a multi-company maintainer base reduces single-vendor lock-in risk.

Active, Fast-Moving Development

Frequent releases (roughly monthly) and a responsive community/issue tracker.

Cons

Younger Project, Less Battle-Tested

Despite inheriting Vault's codebase, OpenBao as an independent project is only ~2 years old.

Smaller Ecosystem Than Vault

Fewer third-party integrations, less mature CI tooling, and a smaller pool of experienced practitioners.

No Official Managed Cloud/SaaS

Unlike HCP Vault, there is no first-party hosted SaaS; MSPs must self-host or rely on third-party managed offerings.

Commercial Support Still Consolidating

Enterprise support is only just emerging (e.g., ControlPlane), so SLAs and long-term roadmaps are less proven than incumbents.

Migration Friction From Vault Enterprise

Organizations relying on Vault Enterprise-only features beyond namespaces may face gaps before switching.

Feature Comparison

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