Topic starter
12/06/2026 12:59 am
TL;DR: IAM handles authentication and access control, while IGA extends identity management into lifecycle governance, access certification, and compliance across systems, according to Zluri’s analysis. The practical shift is not more access management, but stronger control over entitlement review, revocation, and auditability.
Editorial analysis by NHI Mgmt Group, based on content published by Zluri: “Difference Between IAM and IGA”.
Key questions
Q: Why do organisations need IGA if IAM already controls access?
A: IAM controls whether access works, but IGA controls whether access is still justified.
Q: Why do access reviews fail so often in traditional IGA programmes?
A: They fail because reviewers are asked to judge technical entitlements without enough business context, so approval fatigue sets in and access gets rubber-stamped.
Q: What breaks when access management is separated from identity governance?
A: Teams gain the ability to grant access but lose confidence that access remains appropriate over time.
Practitioner guidance
- Define IAM and IGA control boundaries Separate authentication and authorisation responsibilities from lifecycle governance, access certification, and audit evidence so ownership is clear across teams.
- Implement access certification workflows Create periodic reviews for application and group entitlements, assign accountable reviewers, and require revocation or justification outcomes.
- Map joiner-mover-leaver processes to governance Use lifecycle events to trigger provisioning, permission changes, and deprovisioning across connected systems, not only in the primary directory.
Bottom line: IAM manages access at the point of authentication and authorisation, but IGA governs whether entitlements should continue to exist across the identity lifecycle.
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12/06/2026 10:36 am
IGA is the governance correction to IAM’s point-in-time model. IAM answers whether an identity can get in; IGA answers whether that access should still exist after role change, business change, or policy review. That distinction is not cosmetic. It determines whether identity control is reactive access administration or defensible governance across the lifecycle.
A few things that frame the scale:
- Nearly 60% of IT leaders cite restrictive cost and complexity as a weakness of legacy identity governance, according to the 2025 State of Identity Governance Report.
A question worth separating out:
Q: How do IAM and IGA work together in an identity programme?
A: IAM provides the operational layer for authentication, authorisation, and provisioning. IGA adds the governance layer by managing lifecycle change, certification, policy enforcement, and compliance evidence, so the programme can control not only access creation but also access continuation and removal.
👉 Read our full editorial: IAM vs IGA: why governance changes the access control model