Microsoft Purview is a strong ai security tool, but it is not the only option. Free alternatives include Arthur AI. We compared 4 ai security tools to help you find the right fit by use case, price, and technical requirements.
Independently verified metrics. Sources: Vendor documentation, independent research. Verified 2026.
| Tool | Injection Block% | PII Redactionms | False Positives% |
|---|---|---|---|
| Microsoft Purview (this) | 99.5% | 100 | 0.5% |
| Credo AI | - | - | - |
| HiddenLayer | 99.8% | - | 0.1% |
| Arthur AI | 99% | 80 | 0.2% |
| Lasso Security | 99.9% | 50 | 0.1% |
Alternatives are not always the right move. Microsoft Purview remains strong in these scenarios.
4 alternatives evaluated by features, pricing, and real-world use cases.
Expert Take
Microsoft Purview works well when you need to track user activity in near real-time across M365 devices and configure custom Sensitive Information Types. The friction starts when you attempt to secure GenAI deployments, as the platform cannot detect active prompt injection attacks and only reacts after a breach has occurred. Before buying, compare vs Varonis, which provides proactive threat detection and automated remediation across multi-cloud environments without requiring expensive add-on connectors.
Oleh KemFounder & Lead AnalystCredo AI works well when translating technical artifacts into risk insights and mapping AI projects to regulatory frameworks. Rated 4.9/5 vs 4.4/5 for Microsoft Purview.
HHiddenLayer works well when organizations need to secure machine learning model weights and pipelines. Rated 4.8/5 vs 4.4/5 for Microsoft Purview.
Arthur AI works well when regulated enterprises need to monitor ML models for bias, fairness, and LLM performance. Priced higher at $60/mo vs $12/mo.
LLasso Security works well when enterprises need to secure AI agents at runtime using real-time behavioral intent analysis.
Microsoft Purview compared against all 4 ai security alternatives. Pricing, free plan availability, rating, and ai security-specific capabilities.
| Tool | Price | Free Plan | Rating |
|---|---|---|---|
| $12/mo | No | 4.4G2 |
 | Pay-as-you-go | No | 4.9G2 |
| Pay-as-you-go | No | 4.8G2 |
 | $60/mo | 4.5G2 | |
| Pay-as-you-go | No | - |
Choose Credo AI if you need deep alignment with eu ai act, nist rmf, iso 42001
HChoose HiddenLayer if you need unique focus on ml model-level security (weights, pipelines)
Choose Arthur AI if you need best-in-class bias and fairness detection