DefensX alternatives

5 Best DefensX Alternatives for MSPs in 2026

DefensX is the best-known MSP-channel shadow AI tool — but it\'s browser-only, and for shops that need coverage across the endpoint and the Microsoft 365 tenant too, it leaves real gaps. Below are the 5 strongest DefensX alternatives, ranked, with ShadowLock at #1 for three-layer shadow AI detection at a transparent per-device price.

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Why MSPs look for a DefensX alternative

→Browser-only blind spot. DefensX enforces inside the managed browser tab. Desktop AI apps, unmanaged browsers, and clipboard pastes outside the tab fall outside its control surface.
→No M365 tenant visibility. DefensX can't enumerate Copilot plugins or third-party AI OAuth grants already consented in your Microsoft 365 tenant — that's a cloud-side audit DefensX isn't set up for.
→Quote-only pricing. DefensX prices through Pax8 / Sherweb / ConnectWise with no public per-seat number. Procurement teams trying to model renewal economics ask for an alternative they can budget.

Quick picks at a glance

#	Tool	Best for	Standout
1	ShadowLockTop pick	MSPs and IT teams that want shadow AI coverage across the endpoint, the browser, and the M365 tenant — with a price they can budget.	Three control layers in one product — endpoint, browser, and M365 tenant via Microsoft Graph
2	ThreatLocker	Shops standing up a single zero-trust posture across the whole endpoint stack.	Default-deny application control + Ringfencing across the whole endpoint
3	DNSFilter	MSPs that want a baseline DNS filter where shadow AI is one category among many.	Transparent pricing — G2 lists three editions $1.15–$3 per license
4	Control D	MSPs that want a transparently priced DNS-layer baseline as their DefensX replacement.	Transparent $2/endpoint/month pricing
5	Conceal (ConcealBrowse)	Shops standing up zero-trust browser security where shadow AI is a secondary benefit.	URL isolation in a cloud sandbox

#1ShadowLockTop pick

Best for

MSPs and IT teams that want shadow AI coverage across the endpoint, the browser, and the M365 tenant — with a price they can budget.

Standout

Three control layers in one product — endpoint, browser, and M365 tenant via Microsoft Graph

#2ThreatLocker

Best for

Shops standing up a single zero-trust posture across the whole endpoint stack.

Standout

Default-deny application control + Ringfencing across the whole endpoint

#3DNSFilter

Best for

MSPs that want a baseline DNS filter where shadow AI is one category among many.

Standout

Transparent pricing — G2 lists three editions $1.15–$3 per license

#4Control D

Best for

MSPs that want a transparently priced DNS-layer baseline as their DefensX replacement.

Standout

Transparent $2/endpoint/month pricing

#5Conceal (ConcealBrowse)

Best for

Shops standing up zero-trust browser security where shadow AI is a secondary benefit.

Standout

URL isolation in a cloud sandbox

What to look for in a DefensX alternative

Off-browser coverage

Does the tool catch AI usage outside the managed browser? Desktop apps, unmanaged browsers, embedded AI inside approved SaaS — anywhere a paste happens.

M365 tenant scanning

Can it enumerate AI OAuth grants in your Microsoft 365 tenant via Graph? Copilot plugins, third-party AI add-ins, and user-consented apps that live in the cloud, not on the endpoint.

Content classification

Can it read the prompt and decide allow / block based on what's in it? Or is it limited to categorical domain / app decisions?

Pricing model

Public per-seat tiers vs quote-only. The first lets procurement budget renewals; the second is a marketplace negotiation every cycle.

MSP delivery fit

Multi-tenant by design with partner → org → device hierarchy. PSA / RMM integration. Channel motion that matches how you sell.

The 5 best DefensX alternatives, ranked

#1

ShadowLock

Top pick

Three-layer shadow AI detection — endpoint, browser, and Microsoft 365 tenant. Transparent per-device pricing.

What it is

A Windows endpoint agent + managed browser extension + Microsoft Graph integration purpose-built for shadow AI. The agent monitors the clipboard and classifies content locally with Shannon entropy + Luhn validation; the extension force-installs into Chrome/Edge; the Graph integration scans the M365 tenant for AI OAuth grants and Copilot plugins. Multi-tenant from day one.

Why it's a DefensX alternative

ShadowLock catches the four things DefensX structurally can\'t see: AI usage in unmanaged browsers, native desktop AI apps, pastes from anywhere into anywhere, AND OAuth-consented AI apps and Copilot plugins sitting inside your M365 tenant.

It\'s also the only alternative on this list with a Microsoft Graph integration and a public per-device price.

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#2

ThreatLocker

Zero-trust endpoint platform. Blocks AI apps and domains, but doesn't inspect prompts.

What it is

A broad zero-trust platform built around default-deny application allowlisting and Ringfencing. Web Control (in beta at the Zero Trust World 2025 launch) category-blocks AI web domains; application allowlisting prevents desktop AI apps from installing.

Why it's a DefensX alternative

If your DefensX exit is driven by "we want zero-trust across the whole endpoint, not just the browser," ThreatLocker is the heavier-weight answer. It blocks AI tools at access time rather than inspecting prompts — Danny Jenkins has been public about that scope.

Pair it with ShadowLock when you also need content-level inspection on the AI tools you do allow.

Full ShadowLock vs ThreatLocker →

#3

DNSFilter

AI-powered protective DNS with transparent MSP pricing. Resolver-layer category blocking.

What it is

A protective DNS service that blocks malicious and categorized domains (400+ SaaS apps, including an AI category) before the connection completes. Roaming clients for Windows, macOS, iOS, Android. CRN 2025 5-Star MSP partner program.

Why it's a DefensX alternative

If "block every AI domain at the network edge" satisfies your governance team, DNSFilter is a clean, transparently priced way to do it. It will not catch Copilot inside Word, will not see the prompt content, and will not enforce if a device routes around the roaming client — but it\'s a simple control with one knob.

Full ShadowLock vs DNSFilter →

#4

Control D

Transparent-pricing DNS filter with AI / ML threat blocking. Often positioned against DefensX directly.

What it is

A DNS filtering and web security service with AI/ML threat blocking. Markets heavily against DefensX and DNSFilter. SMB pricing at $2/endpoint/month; MSP from $150/month minimum.

Why it's a DefensX alternative

Control D is the DefensX alternative MSPs reach for when they want simplicity and a published price. Same structural limits as any DNS filter — no content visibility, no enforcement off-resolver — but a clean control surface and an active positioning against DefensX in the channel.

Full ShadowLock vs Control D →

#5

Conceal (ConcealBrowse)

Browser-isolation extension. Strong on malware and phishing; not purpose-built for shadow AI.

What it is

A browser extension that turns Chromium and Firefox into a zero-trust secure browser by isolating unknown / risky URLs in a cloud sandbox. Channel-only, three tiers (Browser Runtime Protection, Advanced, Complete). Strong MSP / MSSP channel motion.

Why it's a DefensX alternative

If the reason you\'re leaving DefensX is that you want isolation rather than redaction inside the browser, Conceal is the closer fit. It is not, however, a shadow AI–specific control — there\'s no dedicated prompt-content classification, and the threat model is built around malware and credential theft.

Full ShadowLock vs Conceal (ConcealBrowse) →

Choose the right alternative for your situation

If your situation is…	Best pick
You need shadow AI coverage outside the managed browser AND in your M365 tenant.	ShadowLock
You want visibility into Copilot plugins and AI OAuth grants in your M365 tenant.	ShadowLock
You're replacing the whole endpoint stack with a single zero-trust platform.	ThreatLocker (+ ShadowLock for content + M365)
You just want a transparently priced DNS filter as a baseline.	DNSFilter or Control D
Your driver is browser isolation against malware and phishing.	Conceal

Frequently asked questions

Why are MSPs looking for a DefensX alternative in 2026?+

Three reasons drive almost every switch: coverage outside the managed browser (desktop AI apps, unmanaged browsers, clipboard pastes); public per-device pricing for procurement; and clipboard-level data classification for HIPAA, SOC 2, or GDPR. Teams that prioritize any of those switch; teams that prioritize marketplace co-sell and in-browser redaction stay.

Can ShadowLock run alongside DefensX during a migration?+

Yes. A browser extension and an endpoint agent don't conflict at the OS layer. Most MSPs pilot ShadowLock on a subset of endpoints with DefensX still in production, then consolidate once the pilot validates the migration.

Why isn't DefensX itself in this list?+

This page is for buyers actively researching a switch. DefensX is the subject of the comparison, not an option in the list. If you decide to stay with DefensX, that's a valid outcome — but most people landing here have already decided to look.

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