A redundant SaaS app is a tool that duplicates the function of another application already in use by the organisation. The governance issue is not only cost duplication, but the extra identities, permissions, and integrations that have to be reviewed, retired, and secured across both systems.
Expanded Definition
A redundant SaaS app is more than an overlapping license. In NHI governance, it creates a second control plane with its own service accounts, OAuth grants, API keys, SCIM connections, and audit trails. That duplication matters because every extra application expands the identity inventory that must be governed under NIST Cybersecurity Framework 2.0 principles of asset visibility, access control, and recovery.
Definitions vary across vendors on whether “redundant” means functionally duplicated, partially overlapping, or merely underused. NHIMG treats the term operationally: if two SaaS tools perform the same business function, both must be evaluated for credential sprawl, privilege drift, data residency exposure, and offboarding complexity. That distinction is important in NHI security because an unused app can still hold active tokens and privileged integrations long after users have migrated away.
The most common misapplication is treating redundancy as a procurement-only issue, which occurs when teams remove the license but leave the app’s identities, tokens, and connector permissions active.
Examples and Use Cases
Implementing redundancy cleanup rigorously often introduces migration and decommissioning overhead, requiring organisations to weigh near-term operational continuity against the cost of maintaining duplicate identities and integrations.
- A collaboration team keeps both a legacy file-sharing platform and a new SaaS replacement live during transition, leaving two sets of service accounts and webhook secrets to secure.
- A finance group adopts a second expense management app for a subsidiary, but both apps still sync with the same identity provider, increasing the review burden for entitlements and role mapping.
- An engineering org preserves a backup incident ticketing tool “just in case,” yet its API key remains valid and reachable after the primary workflow is restored.
- Redundancy appears after acquisitions, when duplicate SaaS stacks merge without consolidating OAuth trust relationships or revoking dormant admin access.
- In cases like the Snowflake breach and Salesloft OAuth token breach, the lesson is that integration sprawl can outlive the business rationale that created it.
Redundant SaaS is also easiest to identify when reviewing app inventories against a standards-based access model such as NIST Cybersecurity Framework 2.0, because duplicate functionality often correlates with duplicate trust paths.
Why It Matters in NHI Security
Redundant SaaS apps matter because duplicate functionality usually means duplicate NHIs, and duplicate NHIs are where governance breaks down. NHIMG reports that NHIs outnumber human identities by 25x to 50x, so even a modest amount of application overlap can multiply the number of credentials, integrations, and privileges that must be inventoried and retired.
This is where redundancy becomes a security issue, not just a cost issue. Dormant SaaS apps can retain valid API keys, outbound webhooks, delegated admin permissions, and data-sharing grants. If those are not revoked, the organisation carries unnecessary access paths that may never be covered by routine reviews. NHIMG data shows that 79% of organisations have experienced secrets leaks, with 77% causing tangible damage, which is why duplicate apps should be examined as identity-risk amplifiers, not only budget inefficiencies.
Practitioners should also connect redundancy to offboarding discipline, because the weak point is often not the active app but the forgotten one. Organisations typically encounter the risk only after a merger, tool migration, or breach investigation, at which point redundant SaaS becomes operationally unavoidable to address.
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 Zero Trust (SP 800-207) set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-01 | Redundant apps expand the NHI inventory and create duplicate service identities. |
| NIST CSF 2.0 | PR.AC | Duplicate SaaS increases access paths that must be controlled and reviewed. |
| NIST Zero Trust (SP 800-207) | Redundant SaaS weakens Zero Trust when multiple trust relationships persist. |
Inventory every SaaS app and retire duplicate NHIs, tokens, and integrations during consolidation.
Related resources from NHI Mgmt Group
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Reviewed and updated by the NHIMG editorial team on June 11, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
