Microsoft Purview is the natural choice for organizations standardized on Microsoft 365 E5. AILeakShield gives the same AI discovery, control and prompt protection to organizations that do not have E5, or that want AI governance in one product their IT provider can run.
What Microsoft Purview is: Microsoft data security and compliance suite (Purview DSPM, Endpoint DLP, Edge for Business inline protection), with Defender for Cloud Apps and Defender for Endpoint for discovery and blocking.
Yes means documented. Partial means limited, an add-on, a separate product or preview. Not documented means we could not find it in the vendor's public documentation; it does not mean the vendor has tested and failed it.
| Capability | AILeakShield | Microsoft Purview |
|---|---|---|
| Discover | ||
| AI websites used in the browser | YesBrowser extension for Chrome, Edge and Firefox with a risk-ranked AI catalog. | YesDefender for Cloud Apps catalog includes a generative AI category; Purview DSPM detects AI site visits on onboarded devices. |
| Desktop AI apps and coding tools | YesFirewall and DNS log import, plus RMM software inventory for MSPs (NinjaOne; ConnectWise, Datto, Kaseya and N-able in beta). | PartialDefender for Endpoint discovers local AI agents and MCP servers once it observes activity; macOS is in preview. |
| AI apps connected to Microsoft 365 (OAuth) | YesRead-only Microsoft 365 connection lists AI apps users or admins have consented to. | YesDefender for Cloud Apps app governance lists OAuth apps with Microsoft 365 access; not AI-specific. |
| AI agents | YesAI agent tools on desktops and AI agents connected to Microsoft 365, such as meeting bots. | YesAgent inventory covers Copilot Studio, Foundry, Microsoft 365 agents and local endpoint agents. |
| Control | ||
| Block or restrict unapproved AI tools | YesIn the browser, through a firewall blocklist feed (Palo Alto EDL, FortiGate, pfBlockerNG, RPZ) and in Microsoft 365 consent. | YesUnsanctioned apps are blocked through Defender for Endpoint network protection or a supported proxy. |
| Revoke AI app access in Microsoft 365 | YesAudited revoke of an AI app's Microsoft 365 grants. | YesApp governance includes remediation for risky OAuth apps; not AI-specific. |
| Protect | ||
| Inspect prompts for sensitive data | YesTyped and pasted prompt text, inspected before it is sent. | YesEdge for Business inline DLP for typed prompts on named AI apps; Endpoint DLP for paste to browsers. |
| Inspect files uploaded to AI | YesFiles attached to AI prompts are inspected before send. | YesEdge inline file upload control and Endpoint DLP upload rules. |
| Warn and require a typed justification | YesCoached warning; the reason is recorded in the audit log. | YesEndpoint DLP supports block with override and business justification. |
| Mask or redact sensitive values | PartialMasking is available in the AILeakShield secure AI workspace; on third-party AI sites the extension warns or blocks. | Not documentedNo prompt redaction found in public documentation. |
| Custom sensitive terms | YesCustomer-defined terms such as project names and client lists. | YesExact Data Match, fingerprinting, trainable classifiers and named entities. |
| Comply | ||
| Built-in NIST AI RMF assessment | YesIncluded in every subscription. | PartialNIST AI RMF 1.0 is a premium Compliance Manager template, licensed separately. |
| AI policy library with staff acknowledgment | YesIndustry policy library with tracked staff acknowledgment. | Not documentedNo AI policy library with staff acknowledgment found. |
| Deploy and buy | ||
| No proxy, SSE or new browser required | Not requiredBrowser extension in the browsers staff already use, plus log import and a Microsoft 365 connection. | PartlyNo proxy, but devices must be onboarded to Purview or Defender; inline prompt DLP needs Edge for Business on Intune-managed Windows. |
| Multi-tenant console for MSPs | YesPartner console with per-client isolation and policy templates. | PartialDefender multitenant management exists; no multi-tenant console for Purview DLP found. |
Microsoft Purview: Purview Endpoint DLP is licensed with Microsoft 365 E5, A5 or G5, the Purview suite, or E5 Information Protection and Governance. Inline protection for third-party AI apps in Edge for Business is billed pay-as-you-go per request on an Azure subscription, and requires Intune-managed Windows devices. NIST AI RMF assessment templates are a premium Compliance Manager add-on.
AILeakShield: A browser extension for Chrome, Edge and Firefox, installed silently through Google Admin, Microsoft Intune, Group Policy or Jamf, plus firewall and DNS log import and an optional read-only Microsoft 365 connection. No proxy, no TLS inspection and no new browser. Everything is in one subscription, sold through IT providers and distribution including TD SYNNEX, with no seat minimum. Most organizations start in monitor mode.
Many organizations use both. If you already own E5, Purview covers Microsoft 365 Copilot deeply, and AILeakShield adds an AI-specific inventory across every AI tool, coverage on devices that are not onboarded to Defender, staff policy acknowledgment and a single governance view for leadership.
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For AI use, yes. AILeakShield covers AI discovery, blocking, prompt and file inspection, Microsoft 365 AI app governance and a NIST AI RMF assessment without Microsoft 365 E5. Purview is broader for general data governance across email, files and endpoints.
No. AILeakShield works with any Microsoft 365 plan, and with Google Workspace organizations, through a browser extension, log import and an optional read-only Microsoft 365 connection.
Yes. They do not conflict. Purview can keep governing Microsoft 365 Copilot and your files while AILeakShield inventories every AI tool, protects prompts in Chrome, Edge and Firefox and records staff policy acknowledgment.
From Microsoft Purview's public documentation and product pages, last checked October 21, 2026, with sources linked on this page. Where we could not find a capability documented, we say so rather than claiming it is missing. Vendors can contact us with corrections.
AILeakShield discovers all the AI in your environment, blocks the AI tools you have not approved, and keeps sensitive data out of the prompts sent to the ones you have.
