How should organisations reduce vendor sprawl without weakening access control?

Why This Matters for Security Teams

Vendor sprawl rarely shows up first as a cost problem. It usually becomes an access-control problem when each platform introduces its own admin model, token store, approval flow, and audit trail. That fragmentation makes it harder to prove who can provision, review, or revoke access, especially for NHIs that outnumber human identities by orders of magnitude. NHI Mgmt Group notes that only 5.7% of organisations have full visibility into their service accounts, which means many teams are trimming tools before they can see the access paths those tools control.

The risk is not just excess licensing. Redundant vendors can create duplicate identities, overlapping permissions, and inconsistent offboarding, which is exactly how orphaned access persists after a tool is removed. The practical benchmark is whether the remaining stack can still support lifecycle governance end to end. That means inventory, least privilege, rotation, review, and revocation must remain intact after consolidation, not merely during it. Current guidance aligns with the OWASP Non-Human Identity Top 10 and NHI Mgmt Group’s Ultimate Guide to NHIs, which both emphasise visibility and lifecycle control over tool count alone. In practice, many security teams discover access drift only after a vendor decommission leaves behind unmanaged secrets and stale admin grants.

How It Works in Practice

Reducing vendor sprawl safely starts with mapping where identity decisions actually occur. For each vendor, identify whether it is acting as a source of truth for provisioning, a policy enforcement point, a secrets holder, or just a downstream consumer of identity data. Then remove redundancy only when the remaining control plane can still perform the same security function without manual workarounds. The key question is not “Can this tool be deleted?” but “Can access still be created, reviewed, rotated, and revoked with the same or better assurance?”

Operationally, this often means consolidating around one system for governance and one for runtime enforcement, while keeping specialized tools only where they add unique control value. For example:

• Use one identity source to drive provisioning and deprovisioning rather than maintaining parallel admin lists.
• Centralise secrets handling so tokens and API keys are not scattered across code, CI/CD, and vendor consoles.
• Require a review trail that survives vendor removal and can still support audit evidence.
• Validate offboarding by testing revocation, not just account disablement.

Framework guidance is consistent here. The OWASP Non-Human Identity Top 10 treats unmanaged service identities and secrets lifecycle gaps as core failure modes, while NHI Mgmt Group’s 52 NHI Breaches Analysis shows how often access problems persist after organisations believe they have cleaned up. The practical control test is simple: if a tool removal forces manual permission edits, the stack is still too brittle. These controls tend to break down in large SaaS estates where each vendor maintains its own role model and offboarding is only partially exposed through APIs.

Common Variations and Edge Cases

Tighter consolidation often reduces cost and complexity, but it can also increase dependency on a smaller number of identity platforms, so organisations have to balance simplification against resilience. That tradeoff is especially visible when a vendor provides both authentication and authorization, because removing it may eliminate a useful control point even if it also trims duplication.

Best practice is evolving, and there is no universal standard for which identity functions must remain centralized versus distributed. In some environments, especially regulated payment flows, retaining a dedicated control layer can be justified if it supports evidence, separation of duties, and stronger revocation discipline. The PCI DSS v4.0 documentation is useful here because it reinforces the need for restricted access, periodic review, and traceable administration even when the toolset changes.

Another edge case is third-party integration. If a vendor is embedded in CI/CD or customer-facing automations, removing it too early can create hidden orphaned secrets or break service continuity. NHI Mgmt Group’s Ultimate Guide to NHIs - Key Challenges and Risks notes that many organisations still store secrets outside proper managers, which makes consolidation riskier unless cleanup is deliberate. Reduce sprawl only after each removal passes a live test for provisioning, review, rotation, and emergency revocation.

Related resources from NHI Mgmt Group

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