HashiCorp Vault alternatives show access control is the real problem

At a glance

What this is: This is a comparison of HashiCorp Vault alternatives, and its key finding is that securing access to systems often requires more than storing or generating secrets.

Why it matters: It matters because IAM, PAM, and NHI programmes need to decide whether their control plane should manage secrets only, or also govern access, auditability, and offboarding across human and machine identities.

By the numbers:

• Only 44% of organisations are currently using a dedicated secrets management system.
• 91% of former employee tokens remain active after offboarding, leaving organisations vulnerable to potential security breaches.

👉 Read StrongDM's comparison of HashiCorp Vault alternatives

Context

HashiCorp Vault is usually discussed as a secrets management system, but the practical decision many teams face is broader: do they want to store credentials, or control access to the resources those credentials unlock? In IAM terms, the difference matters because secrets protection alone does not solve onboarding, offboarding, session logging, or least-privilege enforcement across databases, servers, and Kubernetes.

That is the core governance gap this comparison exposes for NHI programmes. If credentials remain hidden but access paths are still fragmented across VPNs, SSH keys, database logins, and separate approvals, organisations end up with multiple control points and no single access policy that follows the identity through its lifecycle.

Key questions

Q: How should security teams choose between secrets management and access mediation?

A: Choose secrets management when the main problem is storing, rotating, or generating credentials. Choose access mediation when the real requirement is to control who can reach resources, record sessions, and revoke access cleanly across systems. In mature programmes, both controls can coexist, but they solve different governance problems and should not be treated as substitutes.

Q: Why do ephemeral credentials not solve privileged access risk on their own?

A: Ephemeral credentials reduce the time a credential can be abused, but they do not narrow the underlying entitlement unless the access scope is also constrained. If the permission set is too broad, a short-lived secret can still enable excessive access during its valid window. The control objective must be expiry plus scope, not expiry alone.

Q: What do IAM teams get wrong about vault-based access architectures?

A: They often assume that hiding credentials automatically creates governance. In practice, hidden credentials can still support fragmented offboarding, inconsistent approvals, and weak session visibility if each resource keeps its own access logic. The better test is whether the access path itself is centrally governed and reviewable across the full lifecycle.

Q: Should organisations replace a secrets store with a unified access platform?

A: Not automatically. The right decision depends on whether the organisation needs credential custody, access control, or both. Many teams need a secrets store for application secrets and a mediation layer for privileged human or machine access. The practical question is which control surface closes the gap with the least operational friction.

Technical breakdown

Secrets storage versus access mediation

A secrets store keeps credentials safe at rest and can generate ephemeral values for systems that know how to retrieve them. An access mediation layer sits between the user or workload and the target resource, so the credential itself never needs to be exposed to the operator. That distinction changes the control objective. Secrets storage reduces leakage risk, but mediation can also centralise policy, session visibility, and revocation. In practice, the architectural question is whether the organisation wants to protect the secret or govern the full access path.

Practical implication: decide whether the control problem is secret custody, access governance, or both, because the tool choice changes the operating model.

Ephemeral credentials and just-in-time access

Ephemeral credentials are short-lived credentials created for a narrow task and discarded after use. They reduce the window in which a stolen secret remains valid, but they do not automatically solve authorisation design. Just-in-time access adds a governance layer by issuing access only when needed, often with policy checks and expiry conditions. In NHI programmes, this matters because a credential can be temporary while the underlying privilege model remains overly broad. Short-lived access is only useful when the requested scope is tightly bounded.

Practical implication: pair short-lived credentials with explicit scope controls, otherwise you only shrink exposure time without shrinking blast radius.

Unified logging across databases, servers, and Kubernetes

A separate access plane can produce uniform logs across different protocols, including SQL queries, SSH sessions, RDP activity, and kubectl commands. That is valuable because many organisations can authenticate access but still cannot reconstruct what happened inside the session. Protocol deconstruction makes the session observable, which supports audit, incident review, and privilege analysis. For IAM and PAM teams, the issue is not simply whether access occurred, but whether the organisation can prove who did what, to which resource, and under what entitlement.

Practical implication: require session-level evidence for privileged access paths, not just authentication logs or ticket records.

Breaches seen in the wild

• MongoBleed breach — MongoBleed exposed secrets across 87K MongoDB servers.
• Google Firebase misconfiguration breach — Firebase misconfigurations exposed 19.8M secrets across developer instances.

Read our 52 NHI Breaches Analysis report for a comprehensive view of breaches impacting Non-Human Identities including AI Agents.

NHI Mgmt Group analysis

Secrets management is not the same control problem as access governance. This comparison is useful because it forces practitioners to separate credential custody from entitlement enforcement. A vault can reduce exposure, but it does not automatically solve who may reach which system, when, and with what audit trail. The implication is that IAM and PAM programmes should stop treating secret storage as a full access architecture.

Control-plane fragmentation is the real governance debt in many NHI environments. When VPNs, SSH keys, database credentials, and per-system access policies all coexist, revocation becomes partial and review becomes inconsistent. That creates an identity system with multiple enforcement points and no common lifecycle view. Practitioners should treat this as a governance architecture problem, not a tooling preference.

Ephemeral access only works when privilege is already narrow. Short-lived credentials reduce persistence, but they do not compensate for overbroad entitlements or poorly scoped resource access. In other words, expiry is a timing control, not a privilege model. Security teams should use that distinction to test whether their current model actually limits blast radius or only shortens the abuse window.

Unified access logging is becoming a baseline expectation for privileged infrastructure. The strongest operational value in access mediation is often not the credential pattern but the visibility it creates across heterogeneous systems. That aligns with NIST Cybersecurity Framework expectations around protect, detect, and recover, especially where human admins and machine identities touch the same resources. Practitioners should prioritise evidence generation, not just credential hiding.

Vendor tools that unify access often reveal where lifecycle governance was never fully defined. If access can only be revoked cleanly when all identity paths are mediated, then the organisation has already accepted a fragmented lifecycle model. That is a useful diagnostic, because it shows where recertification, offboarding, and privileged access reviews are not actually controlling the real access surface. The practitioner conclusion is to map governance to the path, not the credential alone.

From our research:

• 91% of former employee tokens remain active after offboarding, leaving organisations vulnerable to potential security breaches, according to The 2025 State of NHIs and Secrets in Cybersecurity.
• 62% of all secrets are duplicated and stored in multiple locations, causing unnecessary redundancy and increasing the risk of accidental exposure.
• For a broader lifecycle lens, see Ultimate Guide to NHIs , Lifecycle Processes for Managing NHIs for governance patterns that reduce persistence and improve offboarding.

What this signals

Secrets custody without lifecycle control will keep producing governance blind spots. The more teams split identity paths across vaults, consoles, and direct access methods, the harder it becomes to prove revocation and recertification actually worked. That makes lifecycle mapping the first real control question, especially when privileged access spans both human admins and non-human identities.

Ephemeral credential programmes need a blast-radius lens, not just a rotation lens. The issue is not whether a secret expires, but whether the underlying access path still permits broad system reach during the valid session. Teams that want to reduce exposure should compare session visibility, scope narrowing, and revocation assurance across all privileged paths, not just secret storage mechanics.

Standing access should be treated as a policy failure, not a configuration detail. When organisations move from fragmented credentials to mediated access, the operational signal is often improved auditability, but the strategic signal is stronger: access can finally be reviewed as a lifecycle event. That is the standard NHI programmes should measure against, especially where offboarding and recertification are repeatedly delayed.

For practitioners

• Map the full access path before choosing a secrets model Inventory where access is mediated by VPNs, SSH keys, database credentials, Kubernetes APIs, and direct logins, then determine which paths still bypass central policy and session recording.
• Separate secret custody from entitlement control Use a secrets store only for credential protection when the real requirement is storage, rotation, or generation, but add a mediation layer when you need policy enforcement and auditable access.
• Tighten privilege before shortening credential lifetime Set explicit resource scope, approval rules, and session boundaries before relying on ephemeral credentials, because expiration alone does not prevent overreach during the active session.
• Require session evidence for privileged access reviews Build review processes around captured query logs, shell commands, and kubectl activity so certifiers can evaluate what the identity actually did, not just whether a credential existed.
• Test offboarding against every access path Validate that a single account suspension or entitlement removal actually cuts off database, server, and cluster access everywhere the identity can operate.

Key takeaways

• The core issue is not secrets storage alone, but whether access is governed end to end across users, workloads, and privileged sessions.
• Short-lived credentials reduce exposure time, but they do not fix overbroad privilege, fragmented offboarding, or incomplete audit visibility.
• Teams should evaluate access architecture by revocation assurance, session evidence, and lifecycle control, not by credential hiding alone.

Key terms

• Secrets Management: Secrets management is the discipline of storing, distributing, rotating, and revoking credentials such as tokens, API keys, passwords, and certificates. In practice, it reduces accidental exposure and improves lifecycle control, but it does not by itself define who may use the secret or what the identity can do once authenticated.
• Access Mediation: Access mediation is a control pattern that sits between an identity and a target system to enforce policy, hide underlying credentials, and record the session. It is stronger than storage alone because it governs the access path, not just the secret, which makes revocation and auditing more reliable.
• Ephemeral Credentials: Ephemeral credentials are short-lived credentials created for a narrow task and discarded after use. They reduce the time available for theft or reuse, but they only improve security when the permitted scope is tightly bounded and the surrounding access model prevents broad privilege from persisting during the session.
• Privileged Access Review: Privileged access review is the process of verifying whether elevated access is still needed, properly scoped, and attributable to the right identity. For non-human and privileged infrastructure access, the review must look at sessions, entitlements, and revocation evidence, not just account existence.

Deepen your knowledge

Secrets lifecycle and privileged access boundaries are core topics in our NHI Foundation Level course, the industry's only accredited NHI security programme. If your team is deciding where secrets management ends and access governance begins, it is worth exploring.

This post draws on content published by StrongDM: Access Alternatives to HashiCorp Vault. Read the original.