AWS Secrets Manager vs OpenBao: Which Alternative is Best? (2026)

AWS Secrets Manager is a fully managed cloud service and does not support self-hosting or offline operation. For local development, you can mock the Secrets Manager API or use environment variables, but the actual service requires internet connectivity and AWS infrastructure.

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Secrets stored in AWS Secrets Manager are encrypted at rest using AWS KMS (Key Management Service) keys. You retain ownership and control of the encryption keys if you use customer-managed KMS keys, ensuring that only authorized IAM principals can decrypt and access secrets. AWS does not have access to the plaintext secrets without your permission.

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Yes, AWS Secrets Manager enforces API rate limits, typically around 40 requests per second per account per region, which can impact applications with very high secret access frequency. Additionally, costs can increase significantly with many API calls due to per-API-call pricing, so caching secrets locally or using AWS SDK caching mechanisms is recommended to reduce calls and control expenses.

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AWS Secrets Manager does not provide a native bulk export feature for secrets due to security reasons. To migrate secrets, you typically write scripts using AWS SDKs to programmatically retrieve each secret and then securely transfer it to the target system. Care must be taken to handle secrets securely during export and import to avoid exposure.

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OpenBao retains Vault's core architecture and concepts, so if you are familiar with Vault, the self-hosting complexity is similar. However, since OpenBao has a smaller ecosystem and fewer pre-built integrations, you may need to invest more effort in custom configuration and operational tooling. Additionally, community support is more limited, so in-house expertise is crucial for managing upgrades, HA setups, and disaster recovery.

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Yes, OpenBao can be deployed in fully air-gapped environments since it is open-source and does not rely on any external vendor services. All secret storage and dynamic credential generation happen within your infrastructure. However, you will need to manually handle updates and plugin installations offline, as there is no built-in mechanism for automatic updates without network access.

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Since OpenBao is a self-hosted, open-source system, your organization fully owns all secrets and data stored within it. There is no vendor lock-in or external data transmission by default. Data privacy depends on your infrastructure security and OpenBao's encryption-at-rest and in-transit features, which are inherited from Vault's mature cryptographic implementations.

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OpenBao aims to maintain compatibility with Vault's API to ease migration and usage. However, some enterprise Vault API endpoints and plugins may not be available or fully implemented in OpenBao due to its community-driven nature and smaller feature set. It is recommended to review OpenBao's API documentation and test critical integrations before production use.

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Since OpenBao is a fork of Vault, migration can be done by exporting Vault secrets using Vault's built-in export tools or API and then importing them into OpenBao using compatible APIs or CLI tools. However, there is no official automated migration tool, so you should plan for manual verification and testing. Dynamic credentials and leases may require reconfiguration in OpenBao due to potential differences in plugin support.

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