Nullgen AI BlockerHow to block Mistral Le Chat
How to block Mistral Le Chat on every device
Le Chat is Mistral AI’s assistant, the French lab’s consumer chatbot, with a website, mobile apps, and a developer API. Below: how to block Mistral Le Chat in the browser, on phones and tablets, on your home or school network, and on managed devices.
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Mistral Le Chat
AI assistants
chat.mistral.aiBlocked2 hostnames in the Nullgen catalog
Every entry also covers its subdomains, so the Mistral Le Chat app and API are blocked too.
What Mistral Le Chat connects to
These are the hostnames Mistral Le Chat uses for its website, its apps, and its API. Each entry is matched as a suffix — blocking chat.mistral.ai also blocks every subdomain of it — so the Mistral Le Chat app cannot slip through on a hostname that is not listed. Shared hosts that other products need are deliberately left out.
| Hostname | Role |
|---|---|
| chat.mistral.ai | Main website |
| api.mistral.ai | App, API, or content host |
Block Mistral Le Chat in the browser
Free: the Nullgen browser extension
The free extension blocks Mistral Le Chat and every other tool in the catalog in Chrome, Edge, Firefox, and Safari. It works on the page itself — no DNS change, no policy — and updates as the catalog grows.
Managed browsers: block the sites by policy
On a school or company fleet, push the hostnames as a browser policy so Mistral Le Chat is blocked even when someone uninstalls extensions. These snippets use the official Chrome, Edge, and Firefox policy names and the same hosts listed above.
Chrome and Edge — URLBlocklist
{
"URLBlocklist": [
"api.mistral.ai",
"chat.mistral.ai"
]
}Firefox — policies.json
{
"policies": {
"WebsiteFilter": {
"Block": [
"*://api.mistral.ai/*",
"*://*.api.mistral.ai/*",
"*://chat.mistral.ai/*",
"*://*.chat.mistral.ai/*"
]
}
}
}Chrome and Edge treat a bare hostname as the host plus every subdomain. Firefox needs both the apex and the wildcard pattern.
Need every AI tool in one file, or a .reg or macOS profile?
Open the free policy generatorBlock the Mistral Le Chat app on phones and tablets
Nullgen mobile app
The Nullgen app blocks Mistral Le Chat and 100+ other AI apps and sites on the whole device with an on-device filter — the app, the website, and the API, on any network, with no DNS server to run. Included with Nullgen Pro.
Without Nullgen: Screen Time on iPhone and iPad
- 1Open Settings → Screen Time → Content & Privacy Restrictions and turn restrictions on. This covers Mistral Le Chat in Safari and in apps that use Apple’s web filter.
- 2Under Web Content, choose Limit Adult Websites — the setting that lets you deny chat.mistral.ai by name.
- 3Under Never Allow, add chat.mistral.ai. Safari and apps that use Apple’s web filter will refuse it.
- 4To keep the Mistral Le Chat app off the device entirely, delete it and set Installing Apps to Don’t Allow, or use Ask to Buy on a child’s Apple Account.
Without Nullgen: Family Link on Android
- 1Open Family Link, choose the child, then Controls → Content restrictions → Google Chrome — where Mistral Le Chat can be blocked by site.
- 2Choose Only allow approved sites, or add chat.mistral.ai under Blocked sites.
- 3Under Controls → App limits, block the Mistral Le Chat app, or require approval for new installs from Google Play.
Block Mistral Le Chat on your home or school network
A DNS blocker such as Pi-hole, AdGuard Home, NextDNS, or pfBlockerNG blocks Mistral Le Chat for every device on the network — laptops, phones, consoles, and the Mistral Le Chat app — without installing anything on them. Subscribe to the Mistral Le Chat file from the public blocklist, or paste the rules directly.
Subscribe to the Mistral Le Chat list
AdGuard Home, uBlock Origin, and Brave rules
||api.mistral.ai^
||chat.mistral.ai^DNS blocking cannot see inside a VPN or a phone on mobile data. For a block that follows the device, use the Nullgen apps or an MDM profile.
Block Mistral Le Chat on managed devices
Schools and companies can block Mistral Le Chat on every managed iPhone, iPad, laptop, and Chromebook from the MDM they already run — Intune, Jamf, Kandji, or Google Workspace — with per-person policies and an approval flow for legitimate use. Nullgen Pro provides the profiles and the dashboard; these guides walk through the setup.
Questions about blocking Mistral Le Chat
Does the free Nullgen extension block Mistral Le Chat?
Yes. The free extension blocks prompts on Mistral Le Chat and every other AI tool in the catalog in Chrome, Edge, Firefox, and Safari. It works on the page itself, so it needs no policy and no DNS change.
Will blocking Mistral Le Chat break other websites?
No. Every hostname on this page belongs to Mistral Le Chat alone. Shared websites that other products depend on are never on the list — which is also why AI features built into those products stay reachable.
Can someone get around a Mistral Le Chat block?
A browser-only block can be bypassed with another browser or the Mistral Le Chat app, and a network block can be bypassed with a VPN or a phone on mobile data. A block on the device itself — the Nullgen apps, Screen Time, or an MDM profile — follows the device wherever it goes.
Does this block the Mistral Le Chat app, not just the website?
A DNS or device-level block does. The app talks to the same hostnames listed above, and every entry covers its subdomains, so the app cannot slip through on a hostname that is not listed. A browser policy or extension only covers the browser.
What happens when Mistral Le Chat adds a new hostname?
The catalog is updated as vendors change, and the Nullgen apps, the extension, and the public blocklist all read from it, so a new hostname reaches every device without anyone editing a list by hand.
Block Mistral Le Chat today
Start with the free browser extension. Add Nullgen Pro when you need the Mistral Le Chat app blocked on phones, tablets, and desktops, with approvals for the people who really need it.