July 7, 2026
Little Snitch alternatives: 6 Mac firewalls that cost less or nothing
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Little Snitch is the benchmark for per-app outbound firewall control on Mac. It’s also €59. If that’s the number that sent you here, there are six replacement tools worth knowing, two of them free.
- FireWally: Free • Monitor + block • macOS 13 Ventura+
- LuLu: Free • Blocker (intercepts connections) • macOS 12 Monterey+
- Little Snitch Mini: $13.49/year • Blocker (intercepts connections) • macOS 11 Big Sur+
- Radio Silence: $9 one-time • Block-only, no traffic monitoring • macOS 10.15 Catalina+
- Vallum: $15 one-time • Block by app, port, and protocol • macOS 11.2+
- Tiny Shield: $29 one-time • Monitor + block • macOS 15 Sequoia+
Test conditions
My test environment was as follows:
- MacBook Pro M1, macOS Tahoe 26.4.1,
- No active VPN, and
- Fresh user profile with no custom firewall rules.
Criteria:
- Setup speed: Time from download to a working firewall
- Rule creation: Number of clicks to block a specific app
- Pop-up behavior: Does it prompt on every new connection or not
- Resource load: CPU and RAM during passive monitoring
- macOS Tahoe compatibility: System Extension status at the time of testing
sudo lsof -i -nP | grep ESTABLISHED
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Note:
After a major macOS update (for example, Sequoia 15 → Tahoe 26), every firewall’s System Extension requires manual re-approval in System Settings → General → Login Items & Extensions. If you skip this step, the firewall stops working with no notification, and traffic flows through freely. Check this after every major update.
macOS firewall list
| Price | Block by app | Block by IP / domain | Traffic monitoring | App Store | |
|---|---|---|---|---|---|
| FireWally | Free | ||||
| LuLu | Free | Basic | |||
| Little Snitch Mini | $1.49/mo or $13.49/yr | Limited | |||
| Radio Silence | $9 one-time | ||||
| Vallum | $15 one-time | ||||
| Tiny Shield | $29 | Limited |
All tools handle outbound connections only. Inbound connections are managed by the built-in macOS firewall at System Settings → Network → Firewall.
Which Mac firewall fits your workflow?
- FireWally: You want visual traffic monitoring and blocking capability for all apps in one window, without a pop-up every time something connects.
- LuLu: You want a free, open-source alternative with Little Snitch-level interception, and you trust the security community’s judgment.
- Little Snitch Mini: You already know Little Snitch’s logic and want a lighter, cheaper version of the same thing.
- Radio Silence: You’d better block one app in two clicks, no monitoring, no setup.
- Vallum: You need per-port and per-protocol rules, not just per-app blocking.
- Tiny Shield: You want a simple firewall with minimal configuration required.
Free alternatives to Little Snitch
As of summer 2026, there are two free macOS firewalls which can replace Little Snitch. They are FireWally and LuLu.
FireWally: Free app blocking firewall
 |
Priced at: $0 |
|---|---|
| Compatible with: macOS 13 Ventura or later | |
| Works on: Intel & Apple Silicon | |
| Control model: Monitor first, block when needed | |
| Interface style: App-based traffic dashboard with blocking and unblocking controls |
FireWally monitors all outbound connections and lets you block or allow them per app, with no pop-up every time a new connection is made. Instead of interrupting your work for each request, it logs what’s happening in the background and shows what’s online.
How FireWally compares to Little Snitch
What makes it stand out against Little Snitch is: the AI App Summary. Little Snitch tells you what an app is connecting to and how much data it’s sending. Firewally adds why:
- A plain-English explanation of what that connection is for.
- For most users, knowing what the app is and why the app is connecting is more useful than a raw IP address and port number.
The core model is the same: per-app outbound control. Generally, FireWally is simpler:
- One-click install from the App Store,
- No pop-up storm during setup, and
- A per-app traffic dashboard for outbound connections
Pros:
Free, Mac App Store install
No per-connection pop-ups
Per-app traffic monitoring
AI app connection summary
Cons:
No per-hostname or per-port rules
No Network Map (Little Snitch's visual connection graph)
No location profiles (Home/Work)
LuLu: Free alert firewall
 |
Priced at: $0 |
|---|---|
| Compatible with: macOS 12 Monterey or later | |
| Works on: Intel & Apple Silicon | |
| Control model: Prompt first, remember your decision | |
| Interface style: Connection alerts with rule-based blocking |
LuLu is a free, open-source firewall that blocks unauthorized outgoing connections. It prompts you the first time each app tries to make an outgoing connection: approve or deny, optionally save the rule. It also includes a monitor to track network activity, which shows everything from apps to their subprocesses, protocol, state, and transfer values.
How LuLu compares to Little Snitch
If you want LS-level interception behavior at zero cost, LuLu is the right call. The pop-up cadence is heavy at first; every app you’ve never given a rule to will ask. After a week, once your rules are established, it quiets down.
So, LuLu covers the core use case and blocks what you don’t trust. It lacks the Network Map, detailed traffic statistics, and hostname-pattern rules that power users rely on in Little Snitch.
Note:
/Library/Objective-See/LuLu/rules.json
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Advantages and disadvantages of picking LuLu
Pros:
Completely free, open source (GitHub)
Trusted by the macOS security community
Active development, regular updates
Cons:
No traffic statistics or Network Map
Pop-up on every new connection from a new process
Less polished interface
Affordable Little Snitch replacements
Not every alternative to Little Snitch is free, but several cost significantly less than LS.
Little Snitch Mini: Lighter version of Little Snitch
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Priced at: $1.49/month or $13.49/year |
|---|---|
| Compatible with: macOS 11 Big Sur or later | |
| Works on: Intel & Apple Silicon | |
| Control model: Approve or deny new connections | |
| Interface style: Simplified Little Snitch-style app control |
Little Snitch Mini comes from Objective Development, the same team behind the full Little Snitch. It covers per-app outbound blocking with the same conceptual logic. Still, it drops the advanced features: no Network Monitor (the real-time connection graph), no hostname pattern rules, no profiles, and limited connection statistics.
How Little Snitch Mini compares to Little Snitch
If you already know how Little Snitch works, the Mini version feels familiar. The gap shows when you need fine-grained control: wildcards, per-hostname rules, and connection statistics. One thing worth knowing before you choose Mini: rules created in Little Snitch Mini are not compatible with the full version’s rule format. Upgrading later means starting your rules from scratch.
Advantages and disadvantages of picking Little Snitch Mini
Pros:
Mac App Store
Less setup and lower price than the full version
Familiar Little Snitch interaction model
Cons:
Significantly fewer advanced rules and customization options
No blocking in trial
Rules don't transfer to full Little Snitch
Radio Silence: Paid app blocking firewall
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Priced at: $9 one-time purchase |
|---|---|
| Compatible with: macOS 10.15 Catalina or later | |
| Works on: Intel & Apple Silicon | |
| Control model: Block selected apps | |
| Interface style: Simple block list with no traffic monitoring |
Radio Silence does one thing: block an app’s outbound connections completely. Open the app, block the app you want to silence. This tool is about stopping apps like Adobe Creative Cloud, Spotify, Microsoft Teams, or similar software from accessing the Internet without managing firewall rules or responding to alerts.
How Radio Silence compares to Little Snitch
It doesn’t try to compete with Little Snitch. They solve different problems. Little Snitch shows everything and makes you decide connection by connection. Radio Silence cuts the connection and asks no further questions.
If your goal is to stop Adobe Creative Cloud from phoning home or prevent Spotify from doing anything on the network, Radio Silence is a fast option for that. CPU and RAM footprint during blocking is close to zero.
The thing to be clear about: Radio Silence has no monitoring. You can’t see where a blocked app was trying to connect, how often, or to which IP addresses. Radio Silence is a block switch, not a monitor.
Advantages and disadvantages of picking Radio Silence
Pros:
$9 one-time, simple to use
Two clicks to block an app
No per-connection pop-ups
Near-zero CPU and RAM usage
Cons:
No traffic monitoring at all
Block-all-or-nothing only, no per-domain or per-port rules
Not on the Mac App Store
Vallum: Port-and-protocol firewall
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Priced at: $15 one-time purchase |
|---|---|
| Compatible with: macOS 11.2 or later | |
| Works on: Intel & Apple Silicon | |
| Control model: Create granular rules by app, port, and protocol | |
| Interface style: Advanced rule editor for selective blocking |
Vallum by Floating Apps is the only tool on this list that lets you build composite rules: app plus port plus protocol plus IP range. Instead of blocking an app entirely, you can allow it to use HTTPS on port 443 and block everything else. It’s useful for development environments or apps where you want selective access rather than full silence.
How Vallum compares to Little Snitch
Vallum gets closer to Little Snitch’s rule granularity than any other alternative here. The interface is visually older than the competition, and documentation for edge cases is sparse. If you need port-level control and don’t want to pay $59, it’s the right pick.
Advantages and disadvantages of picking Vallum
Pros:
Per-app + per-port + per-protocol + per-IP rules
Mac App Store
Low one-time price
Cons:
The interface is outdated
Less active development
Limited community documentation for edge cases
Tiny Shield: Firewall to block apps for 29 bucks
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Priced at: $29 one-time purchase |
|---|---|
| Compatible with: macOS 15 Sequoia or later | |
| Works on: Apple Silicon | |
| Control model: Manage network access on a per-app basis | |
| Interface style: Lightweight dashboard with basic traffic visibility |
Tiny Shield is an App Store firewall aimed at users who want a simple, managed block list without configuration overhead. Setup is minimal: install, approve the System Extension, and the app starts filtering outbound connections.
Per-app and per-domain blocking, modern interface, one-time price.
How Tiny Shield compares to Little Snitch
Tiny Shield covers the basics: block by app, some traffic visibility, but the feature set is narrower than Little Snitch, Firewally, or LuLu, and the community is smaller. Finding answers to edge cases in forums or GitHub takes more work than it does for the better-known alternatives. At $29 with no subscription, the price is the highest among the listed tools.
Note:
Tiny Shield requires macOS 15 Sequoia or later. It doesn’t support 14 Sonoma or earlier.
Advantages and disadvantages of picking Tiny Shield
Pros:
Mac App Store
Simple interface and setup
Low learning curve
Cons:
Limited traffic monitoring
Smaller user base and support
Harder to find answers to specific issues
The highest price after Little Snitch
Final connection: Which Little Snitch alternative to pick
Outbound firewall control stands for a wide range of use cases. Little Snitch handles all of them and charges a fortune for it. If your needs are narrower, so can be your budget. Luckily, you’ve got six alternatives, some of which are even free:
- FireWally is a free pop-up-free firewall that lists all apps connecting to the Internet, allows you to block and unblock them, and shows real traffic data with the AI App Summary that explains what each connection is actually for.
- LuLu is the right call for users who want an open-source firewall they can audit, with the same connection-by-connection interception model as Little Snitch.
- Little Snitch Mini makes sense if you already know the full Little Snitch and want something lighter. Otherwise, FireWally covers the same ground for free.
- Radio Silence is for one specific situation: you know exactly which app you want to silence and you don’t need to know anything else, i.e. it’s not for monitoring.
- Vallum is the pick for anyone who needs port-level control.
- Tiny Shield is a reasonable option if you need to block apps, don’t need deep monitoring or community support, and you are okay with paying $29.