Teams should use overlap as a trigger to rationalise the stack, not just negotiate price. Redundant applications usually mean redundant admin consoles, duplicate entitlements, and more places for access to drift. Consolidation should therefore include identity review, licence reclamation, and a decision on which tool owns the business process.
Why This Matters for Security Teams
When multiple SaaS tools overlap, the risk is not just spend inefficiency. Every extra platform can add its own admin console, OAuth app, API key set, SCIM connector, and role model, which increases the number of places where access can drift. That creates a larger attack surface for both human administrators and non-human identities. NHIMG research shows how quickly this becomes operational: the Ultimate Guide to NHIs reports that 97% of NHIs carry excessive privileges, while only 5.7% of organisations have full visibility into their service accounts.
Overlap also hides ownership problems. If two products can approve the same workflow, teams often assume one will be retired later, but both continue accumulating users, integrations, and exceptions. That is where entitlement sprawl starts: duplicate admins, stale app-to-app tokens, and inconsistent offboarding across systems. Current guidance suggests treating application overlap as an identity and control issue, not only a procurement issue, and aligning it with the NIST Cybersecurity Framework 2.0 for access governance and asset management. In practice, many security teams discover the overlap only after a support handoff, audit finding, or token misuse has already exposed the duplication.
How It Works in Practice
The safest way to reduce risk is to rationalise overlapping SaaS tools around one system of record for the business process and one primary control plane for identity. That means mapping which application owns approvals, which one stores authoritative data, which one integrates with SSO, and which one should be retired or restricted. The goal is to remove duplicate paths for access and reduce the number of credentials, connectors, and admin roles that must be governed.
A practical workflow usually includes four steps:
- Inventory all overlapping tools, including shadow instances and departmental purchases.
- Compare admin roles, external sharing settings, SCIM or SSO integrations, and service accounts.
- Reclaim licences and remove duplicate privileged accounts before migration is complete.
- Consolidate policy decisions so one tool owns the workflow and the others become read-only or are decommissioned.
That process should be anchored in identity lifecycle controls, especially for machine access. The Top 10 NHI Issues highlights how common overprivileged and poorly rotated non-human identities are, which matters because SaaS overlap multiplies those weaknesses across multiple platforms. For implementation detail, teams should align entitlement reviews with NIST SP 800-207 Zero Trust Architecture, especially where access is granted to APIs, bots, or workflow automations.
In mature environments, consolidation also includes logging and evidence retention so that access reviews, offboarding actions, and token revocations are measurable. These controls tend to break down when each business unit insists on keeping its own SaaS stack because identity ownership becomes fragmented and no single team can enforce consistent deprovisioning.
Common Variations and Edge Cases
Tighter consolidation often increases migration overhead, so organisations have to balance risk reduction against business disruption. The right answer is not always immediate removal of every duplicate tool, especially when a regulated workflow, regional data boundary, or customer contract requires temporary coexistence. Best practice is evolving here: there is no universal standard for how long overlapping SaaS tools may run in parallel, but the principle is to make the overlap explicit, time-bound, and owned.
Edge cases appear when one tool is user-facing and another is automation-heavy. For example, a department may keep a niche SaaS app for collaboration while a broader platform handles the authoritative record. In that case, the safer pattern is to narrow the niche tool to a bounded use case, disable unnecessary admin privileges, and review any service accounts or API tokens tied to it. Where overlap cannot be removed quickly, compensating controls should include shorter token lifetimes, periodic entitlement recertification, and a documented retirement date.
Another common failure mode is assuming consolidation is complete once the licence count drops. If duplicate integrations, API keys, or bot accounts remain active, the security benefit is incomplete. NHIMG’s 2024 ESG Report: Managing Non-Human Identities notes that 72% of organisations have experienced or suspect a breach of non-human identities, which is a reminder that unused automation can remain a live risk long after procurement has finished.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP Non-Human Identity Top 10 address the attack and risk surface, while NIST CSF 2.0 and NIST AI RMF set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST CSF 2.0 | PR.AC-4 | Overlapping SaaS tools create entitlement drift and duplicate access paths. |
| OWASP Non-Human Identity Top 10 | NHI-03 | SaaS overlap often leaves stale machine credentials and tokens active. |
| NIST AI RMF | Rationalising overlapping tools needs explicit governance and accountability. |
Use AI RMF GOVERN-style oversight to assign ownership, review overlap, and document retirement dates.
Related resources from NHI Mgmt Group
Deepen Your Knowledge
Reviewed and updated by the NHIMG editorial team on June 12, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
