PAA vs Defender for Cloud
Different jobs. Most serious teams run both.
This isn’t really a versus. Microsoft Defender for Cloud is a security operations tool — continuous posture management and runtime threat protection across your cloud. PAA is architecture intelligence and compliance evidence. Defender watches for what’s actively wrong. PAA reviews whether the thing was built right in the first place, proves it, and hands you the code to fix what isn’t.
| Aspect | PAA | Defender for Cloud |
|---|---|---|
| Primary job | Architecture posture + compliance evidence | Security posture + threat protection |
| Lens | All 5 Well-Architected pillars | Security |
| Runtime threat detection | No (by design) | Yes |
| Remediation | Terraform / Bicep generated | Guidance + some quick-fixes |
| Compliance | Attestation + narrative + evidence | Compliance dashboard |
| Scope | Azure + M365 + Zero Trust | Azure + multicloud security |
| Pricing | From €99/day · €799/mo | Per resource / per plan |
What Defender is genuinely better at
Runtime. Defender protects workloads as they run, raises alerts on active threats, tracks a live secure score, and spans multicloud. If you need security operations — detection and response on a running estate — that’s Defender’s home, and PAA doesn’t try to play there.
What PAA adds
A security tool tells you what’s wrong. It doesn’t tell you whether your architecture is sound across reliability, cost, operational excellence and performance — or generate the IaC to fix it, or write the board-ready narrative. PAA reviews the build, not just the breaches, and produces the deliverable.
On compliance
Defender’s compliance dashboard shows control status against standards, live, which is useful for tracking. PAA produces the attestation — narrative, control mapping, and evidence across Azure, M365 and Zero Trust — plus the remediation to close the gaps. One is a dashboard you watch; the other is a document you hand someone.
The honest summary
Run Defender for security operations. Run PAA for architecture and compliance. They overlap at the edges and complement each other in the middle. Anyone telling you one replaces the other is selling, not comparing.
Lead with Defender when…
Your need is live security operations — runtime threat detection, response, and continuous security monitoring across a running estate.
Lead with PAA when…
Your need is architecture posture, compliance evidence you can put in front of an auditor, and remediation code — across Azure, M365 and Zero Trust.
Questions
Does PAA replace Microsoft Defender for Cloud?
No. They do different jobs and most serious teams run both. Defender for Cloud is a security operations tool — continuous posture management and runtime threat protection across your cloud. PAA is architecture intelligence and compliance evidence: it reviews whether your environment is built right across the Well-Architected pillars, maps it to frameworks, and generates remediation code. PAA does not do runtime threat detection.
Defender has a regulatory compliance dashboard. Why use PAA for compliance?
Defender shows control status against standards inside its dashboard, which is useful. PAA produces an attestation document with narrative and evidence — the artifact you hand an auditor or board — maps across Azure, M365 and Zero Trust together, and includes the remediation code to close gaps. The two are complementary: Defender for live status, PAA for the defensible deliverable.
We already pay for Defender. Is PAA redundant?
No. Defender keeps watch for what is actively wrong and protects workloads at runtime. PAA answers a different question — is this architected well, can I prove it, and what is the exact fix — and extends to M365 and Zero Trust posture. Teams typically run Defender for security operations and PAA for architecture and compliance.
Defender watches it. PAA proves it’s built right.
Run a posture and compliance assessment on a €99 Day Pass.
