Comparison
ShadowLock vs DefensX
DefensX guards the managed browser. ShadowLock guards three layers — Windows endpoint, browser, and Microsoft 365 tenant — including everywhere DefensX can\'t see. And we publish our pricing.
The wedge
DefensX is a browser-security suite that added shadow AI features. ShadowLock is a shadow AI control built across three layers: endpoint clipboard, managed browser, and M365 tenant via Microsoft Graph. The moment your shadow AI strategy moves past “block the browser tab,” you need more than one layer.
Side by side
| Dimension | ShadowLock | DefensX |
|---|---|---|
| Where it sees AI | Clipboard, desktop AI apps, any browser, and the M365 tenant — three control layers. | Only inside the DefensX-managed browser. |
| M365 tenant / Copilot OAuth | Microsoft Graph integration scans for AI OAuth grants (Copilot plugins, third-party add-ins). Alerts on new consent; can block or revoke. | No M365 Graph integration. Browser extension catches consent flows only when initiated through the managed browser. |
| Prompt-data classification | Shannon entropy + Luhn validation on every paste, locally on the endpoint. | In-browser PII/code regex redaction before submission. |
| Pricing | Public. $1.00 → $0.80/device/month, billed monthly, no minimum. | Quote-only through Pax8 / Sherweb / ConnectWise. |
| MSP delivery | Direct, multi-tenant, PSA/RMM webhooks included. | Channel-only via Pax8 / Sherweb co-sell. |
The browser-extension blind spot
An employee opens an unmanaged Edge profile, installs the ChatGPT desktop app, or copies a customer record from your CRM and pastes it into Claude on their phone via Continuity. DefensX's browser extension doesn't see any of that. Its enforcement happens inside the tab.
ShadowLock's clipboard monitor runs as a Windows service. It sees every paste regardless of which app is receiving it, runs entropy + Luhn classification locally, and blocks at paste time. That's the only architecture that holds when shadow AI moves outside the browser — which, for most shops, is already happening.
Which one fits your situation?
Choose ShadowLock when…
- ✓You need shadow AI coverage outside the managed browser — desktop AI apps, unmanaged browsers, or any paste from anywhere.
- ✓You want visibility into M365 Copilot plugins and third-party AI add-ins consented in your tenant.
- ✓Your procurement team wants a public per-device price they can model against renewal economics.
- ✓You need clipboard-level data classification for HIPAA, SOC 2, or GDPR — not just in-browser regex redaction.
DefensX still fits if…
- •You can mandate the DefensX-managed browser on every endpoint and disable everything else.
- •You buy primarily through Pax8 or Sherweb and want the marketplace co-sell motion.
Frequently asked questions
Can ShadowLock and DefensX run on the same endpoint?+
Yes. A browser extension and an endpoint agent don't conflict. Most evaluations pick one based on threat model rather than running both.
Why doesn't DefensX catch desktop AI apps?+
DefensX enforces inside the browser tab. Native apps like ChatGPT for Windows never touch a managed browser, so they're outside the extension's control surface.
Is ShadowLock cheaper than DefensX?+
DefensX prices through distributors with no public per-seat number, so honest dollar comparisons require a quote. ShadowLock's $0.80–$1.00 per device sits in the same band as MSP DNS filters — below most browser-security suites.
Compare ShadowLock to other shadow AI tools
Researching alternatives? Honest side-by-side comparisons against every MSP-channel shadow AI tool.