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AWS Secrets Manager vs Vault: what changes for NHI governance?

 

(@nhi-mgmt-group)
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Joined: 1 year ago
Posts: 20647
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TL;DR: AWS Secrets Manager charges $0.40 per secret each month while Vault shifts cost into infrastructure and engineering, and Akeyless’s comparison shows the break-even typically lands between roughly 3,000 and 8,000 secrets. The real issue is not price alone but whether teams need cloud-native static secret storage or cross-cloud dynamic credentials with lifecycle control.

NHIMG editorial — based on content published by Akeyless: AWS Secrets Manager vs HashiCorp Vault comparison

By the numbers:

Questions worth separating out

Q: What should teams do first when AWS Secrets Manager and Vault seem to overlap?

A: Start by deciding whether the problem is secret storage, secret rotation, or short-lived credential issuance.

Q: Why do static secrets and lease-based credentials create different risk profiles?

A: Static secrets remain usable until they are rotated or revoked, which leaves a longer replay window if they leak.

Q: What are the signs that a secret-management model is failing at scale?

A: Common signals include duplicated secrets across clouds, secret copies in code or CI systems, unclear ownership of rotation, and a growing mismatch between how long a credential exists and how long the task actually needs it.

Practitioner guidance

  • Define the governance goal before choosing the tool Separate managed secret storage, dynamic credential issuance, and cross-cloud policy control into different requirements so the architecture matches the risk.
  • Model total cost against secret count and engineer time Run the numbers using your real secret inventory, not a tidy sample, and include the human cost of operating Vault or any equivalent platform.
  • Inventory where static secrets still persist Locate credentials stored in code, config, CI systems, and other non-vault locations, then map which of those workloads could move to lease-based credentials.

What's in the full article

Akeyless's full comparison covers the operational detail this post intentionally leaves for the source:

  • Pricing examples across secret counts, regions, and replica scenarios that help you test your own cost model.
  • Deployment and maintenance implications for teams choosing between managed storage and self-operated infrastructure.
  • Capability-by-capability differences in dynamic secrets, rotation, multi-cloud reach, and operational burden.
  • What changes in practice when Vault sits under IBM and how that affects product direction and lifecycle decisions.

👉 Read Akeyless's comparison of AWS Secrets Manager and HashiCorp Vault →

AWS Secrets Manager vs Vault: what changes for NHI governance?

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(@mr-nhi)
Member Moderator
Joined: 5 months ago
Posts: 20238
 

Cloud-native secret storage and dynamic credential issuance are not interchangeable controls. AWS Secrets Manager is optimised for managed storage and rotation inside AWS, while Vault is optimised for short-lived credential issuance across environments. The governance distinction is that one controls secret residence and the other controls credential lifetime. Teams that treat them as equivalent often end up with a storage decision when they really need a lifecycle decision.

A few things that frame the scale:

  • 97% of NHIs carry excessive privileges, increasing unauthorised access and broadening the attack surface, according to the Ultimate Guide to NHIs.
  • Only 5.7% of organisations have full visibility into their service accounts, which means most teams are governing access without complete inventory.

A question worth separating out:

Q: Should organisations prioritise dynamic secrets over managed storage?

A: Prioritise dynamic secrets when credential lifetime is the main risk and the workload can authenticate without a permanent shared secret. Prioritise managed storage when the estate is mostly single-cloud and the operating burden of self-managed platforms would create more risk than the credential lifetime you are trying to reduce.

👉 Read our full editorial: AWS Secrets Manager vs HashiCorp Vault: NHI cost and governance



   
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