Nightfall AI is a data loss prevention platform that covers AI apps alongside SaaS, email and endpoint exfiltration. AILeakShield is focused on AI governance: discovering every AI tool, controlling which are allowed, protecting prompts and producing compliance evidence.
What Nightfall is: AI-native data loss prevention and exfiltration prevention across SaaS, email, endpoints, browsers and AI apps, with MCP and agent controls.
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 | Nightfall AI |
|---|---|---|
| Discover | ||
| AI websites used in the browser | YesBrowser extension for Chrome, Edge and Firefox with a risk-ranked AI catalog. | PartialFlags unapproved AI tools; an AI app inventory is not documented. |
| 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). | PartialNative desktop app monitoring and IDE hooks in the Premier edition. |
| AI apps connected to Microsoft 365 (OAuth) | YesRead-only Microsoft 365 connection lists AI apps users or admins have consented to. | Not documentedMicrosoft 365 OAuth app discovery not found in public documentation. |
| AI agents | YesAI agent tools on desktops and AI agents connected to Microsoft 365, such as meeting bots. | YesDiscovers and catalogs MCP servers (Premier edition). |
| 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. | PartialData-centric blocking and personal account blocking; whole-site blocking not documented. |
| Revoke AI app access in Microsoft 365 | YesAudited revoke of an AI app's Microsoft 365 grants. | Not documentedMicrosoft 365 OAuth grant revocation not found in public documentation. |
| Protect | ||
| Inspect prompts for sensitive data | YesTyped and pasted prompt text, inspected before it is sent. | YesBrowser plugin inspects text before it is submitted, including paste. |
| Inspect files uploaded to AI | YesFiles attached to AI prompts are inspected before send. | YesMonitors and blocks browser file uploads. |
| Warn and require a typed justification | YesCoached warning; the reason is recorded in the audit log. | YesException workflow with justification and approval. |
| Mask or redact sensitive values | PartialMasking is available in the AILeakShield secure AI workspace; on third-party AI sites the extension warns or blocks. | YesCoaches, redacts or blocks in the moment. |
| Custom sensitive terms | YesCustomer-defined terms such as project names and client lists. | YesCustom regex detectors and word lists. |
| Comply | ||
| Built-in NIST AI RMF assessment | YesIncluded in every subscription. | Not documentedNo NIST AI RMF assessment found. |
| 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. | Not requiredEndpoint agent and/or browser plugin; no proxy. |
| Multi-tenant console for MSPs | YesPartner console with per-client isolation and policy templates. | PartialPartner program for resellers and service providers launched August 2026; multi-tenant console not described. |
Nightfall: Nightfall uses an endpoint agent and/or browser plugin, deployed through Chrome Enterprise or MDM. Agent and MCP controls are in the Premier edition. Pricing depends on user count and data volume and is not published.
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.
More comparisons: All comparisons · AILeakShield vs Microsoft Purview · AILeakShield vs Netskope · AILeakShield vs Zscaler · AILeakShield vs Palo Alto Networks · AILeakShield vs Cisco · AILeakShield vs Check Point · AILeakShield vs Island · AILeakShield vs Akamai (LayerX) · AILeakShield vs Harmonic · AILeakShield vs Prompt Security · AILeakShield vs Cyberhaven
For AI governance and AI prompt protection, yes. Nightfall is broader for non-AI exfiltration such as email, SaaS and USB. AILeakShield is broader for AI discovery, AI tool control and compliance evidence.
In the AILeakShield secure AI workspace, yes. On third-party AI sites the extension warns, with a recorded justification, or blocks.
Yes. AILeakShield is focused on AI and does not conflict with an existing DLP tool.
From Nightfall AI'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.
