IAM vs IGA: what the governance gap means for teams

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.

NHIMG editorial — based on content published by Zluri: Security & Compliance Difference Between IAM and IGA

Questions worth separating out

Q: How should organisations decide whether IAM is enough or whether they need IGA?

A: IAM is enough for controlling authentication and day-to-day access only when the environment is small, stable, and easy to review manually.

Q: Why do access reviews matter if IAM already controls permissions?

A: Access reviews matter because permissions can be technically valid and still be operationally wrong.

Q: What breaks when identity governance is missing from an IAM programme?

A: The main failure is entitlement drift.

Practitioner guidance

• Separate runtime access from governance controls Document which controls authenticate and authorise access, and which controls certify, review, and revoke it.
• Extend lifecycle governance to non-human identities Apply joiner, mover, and leaver logic to service accounts, API keys, tokens, and certificates so machine identities do not outlive the business purpose that created them.
• Prioritise access certification evidence quality Require reviewers to see ownership, business justification, and last verification date for each entitlement so approvals produce defensible audit evidence instead of checkbox output.

What's in the full article

Zluri's full article covers the operational detail this post intentionally leaves for the source:

• A side-by-side feature comparison of IAM and IGA across scope, integrations, lifecycle management, and compliance.
• Step-by-step walkthroughs for onboarding workflows, access certification setup, and automated remediation actions.
• Examples of how Zluri structures discovery, provisioning, and review flows across SaaS applications and service accounts.
• Implementation detail on scheduled certifications, reviewer assignment, and workflow templates for access governance.

👉 Read Zluri's analysis of IAM versus IGA for security and compliance →

IAM vs IGA: what the governance gap means for teams?

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