Should organisations choose a vault, a cloud secrets manager, or a unified identity platform?

Why This Matters for Security Teams

The choice between a vault, a cloud secrets manager, and a unified identity platform is really a choice about control boundaries. A vault can be excellent for central storage, a cloud secrets manager can fit tightly into one provider, and a unified identity platform can reduce fragmentation when secrets, privileged access, and policy all need to move together. The wrong answer usually shows up as duplicated secrets, weak lifecycle control, or blind spots between teams.

NHIMG research shows that 62% of secrets are duplicated and stored in multiple locations, which turns a tool decision into an exposure problem rather than just a tooling preference. That is why the governance question is not only where secrets are stored, but also how they are rotated, approved, audited, and revoked across environments. The Guide to the Secret Sprawl Challenge is useful background here, and the OWASP Non-Human Identity Top 10 frames the broader risk of unmanaged machine identities.

Security teams often discover the operational cost only after secrets have already spread across apps, pipelines, and cloud accounts, rather than through intentional design.

How It Works in Practice

Start by mapping the secret lifecycle, not the product category. A vault is strongest when teams need a controlled store for high-value credentials, especially if they already operate a mature process for check-in, retrieval, rotation, and break-glass access. A cloud secrets manager works well when the workload is concentrated in one cloud and the main requirement is native integration with compute services, IAM, and logging. A unified identity platform becomes more compelling when secrets governance must sit alongside privileged access, policy, and workload identity.

In practice, the decision often comes down to whether the organisation wants point storage or end-to-end governance. If the same NHI credential is reused across applications, storage alone will not solve the problem. If approvals, rotation, and audit evidence live in different systems, incident response slows down and offboarding becomes unreliable. NHIMG’s 2025 State of NHIs and Secrets in Cybersecurity reports that 91% of former employee tokens remain active after offboarding, which shows how lifecycle failure outlasts the initial storage decision.

• Use a vault when you need strong central custody and can enforce disciplined operations around it.
• Use a cloud secrets manager when the application estate is mostly native to one cloud and the secrets are tightly coupled to that cloud’s runtime.
• Use a unified identity platform when you need secrets, access policy, audit, and privileged controls to behave as one system.

Current guidance suggests that the most reliable designs also reduce long-lived static secrets in favour of short-lived, automatically revoked credentials wherever the platform and application model support it. These controls tend to break down in multi-cloud estates with many legacy apps because ownership, rotation timing, and retrieval paths are inconsistent.

Common Variations and Edge Cases

Tighter consolidation often increases migration and governance overhead, so organisations must balance simplicity against operational disruption. There is no universal standard for this yet, especially in mixed environments where some teams need cloud-native speed while others need enterprise-wide policy and evidence.

One common edge case is a hybrid estate: a cloud secrets manager may cover the cloud workloads, while a vault still handles on-premises or legacy systems. Another is a regulated environment where auditability and separation of duties matter more than convenience, which makes a unified identity platform more attractive. By contrast, small teams sometimes overbuy a broad platform before they have a clean inventory, which only hides sprawl behind a new interface.

When evaluating options, the practical question is whether the product can actually support rotation, ownership, offboarding, and least privilege at scale, not whether it can simply store a secret. The Top 10 NHI Issues and the Ultimate Guide to NHIs — Lifecycle Processes for Managing NHIs are helpful for separating storage features from actual identity governance.

In practice, the most expensive failures happen when a platform is chosen for procurement convenience instead of secret lifecycle control.

Related resources from NHI Mgmt Group

• When should organisations move from vault-based secrets to workload identity?
• How should security teams choose an identity platform for hybrid and multi-cloud environments?
• Should organisations replace a secrets store with a unified access platform?
• When should organisations choose SPIFFE/SPIRE over cloud-native identity?