

Arthur AI wins for ML engineers needing compliance monitoring at $60/month. Microsoft Purview wins for M365 enterprise compliance teams requiring data governance at $12/month.
The question that matters: “In what situation will I regret choosing A over B after 3 months?”
Arthur's bias monitoring measures model performance disparity across age, gender, and race attributes, generating audit-ready fairness reports with per-group precision and recall breakdowns.
Purview Data Map scans Azure, Microsoft 365, AWS S3, and on-prem SQL Server simultaneously, classifying PII and financial records using built-in classifiers without agent deployment on each source.
Arthur Bench monitors feature distributions and prediction confidence across rolling windows, sending Slack alerts when drift crosses a defined threshold before model accuracy measurably degrades.
Arthur generates SHAP-based feature importance explanations for every prediction, producing the documentation required for financial or healthcare model audits.
Insider Risk Management correlates file downloads, Teams messages, and email forwards in sequence, building an evidence timeline for HR without manually pulling each data source.
Purview's data catalog lets analysts search and understand datasets across business units, with lineage graphs showing where data originated and how it transformed.
Best for: Ideal for individuals or small teams exploring basic AI security needs without commitment
Best for: growing businesses requiring robust AI security monitoring and advanced threat detection
Best for: Designed for large organizations with complex AI deployments needing tailored security solutions and dedicated support
5 differences found across 10 standardized features
Evaluative strengths and weaknesses: not feature lists
Microsoft Purview removed the "Included in Microsoft 365 E3" plan
Plan removed · May 30, 2026
Microsoft Purview added a new "Network Data Security" plan (Custom pricing)
Plan added · May 30, 2026
Microsoft Purview added a new "Data Security Investigations" plan (Custom pricing)
Plan added · May 30, 2026
Microsoft Purview removed the "Microsoft 365 E5 Compliance Add-on" plan
Plan removed · May 30, 2026
Microsoft Purview added a new "Data Lifecycle Management" plan at $6/mo
Plan added · May 30, 2026
Arthur AI removed the "Arthur Evals Engine" plan
Plan removed · May 28, 2026