HisnLabs makes FireAI, so read this as a comparison written by one of the two vendors. Every fact about Little Snitch below comes from Objective Development’s own pages, linked in the sources and checked on 3 October 2026, and where Little Snitch is the better choice we say so plainly. Both are outbound firewalls for macOS: they decide which connections each app may open, something Apple’s built-in firewall, which only handles incoming connections, does not do.
The short answer
Little Snitch is the mature reference in this category, with the deepest rule engine, alerts for incoming as well as outgoing connections and a year of traffic history. FireAI is newer and built around an on-device AI that reviews connections from apps you have not ruled on yet, plus plain-language orders, parental shields and a watch on AI agents. If you enjoy writing precise rules yourself, Little Snitch is the safer pick today. If you would rather not judge every prompt alone, FireAI is worth its 17-day trial.
Little Snitch in 2026
Objective Development’s product page describes a firewall that watches both outgoing and incoming connections and, in its alert mode, asks before an app sends anything. Rules can be narrowed by app, domain, port and protocol, and processes are identified by their code signature, so a rule survives the app being moved and does not carry over to an impostor. A Silent Mode lets connections through at first so you can review them and decide later. Rules can be grouped, shared as remote subscriptions and switched automatically per network. Curated blocklists are updated daily, the Network Monitor keeps up to twelve months of history sorted by app, domain or country, DNS can be encrypted over DoH, DoT or DoQ, and a command-line tool covers automation.
The current release is 6.5. Its download page says it runs on macOS 27 and on Tahoe, Sequoia and Sonoma, with older versions for macOS 13 and earlier on a legacy page. The 6.5 app we downloaded is a universal binary, so it runs on Intel Macs as well as on Apple silicon. Little Snitch is a one-time purchase: the shop lists a single-licence gift card at €59 and also sells Family licences (up to five computers in one household) and Multi licences. Without a licence it runs as a demo with full protection, in three-hour sessions you can restart as often as you like, and its Network Monitor stops after 30 days. Its pages describe no AI features.
FireAI in 2026
FireAI, from HisnLabs, has per-app rules that allow or deny by host, domain, IP address or port and follow the app’s code signature, and it asks before an unknown app connects out. What sets it apart is an optional on-device model, a one-time download of about 1.5 GB that stays on the Mac: it reviews connections from apps that have no rule yet, explains its reasoning in the prompt, and turns every decision into a visible rule you can undo. FireAI Pilot keeps separate lessons for each Wi-Fi network and security mode, and Ask FireAI takes orders such as “block Microsoft Teams” in any of its 16 languages. None of your traffic is sent to HisnLabs.
Around that sit four security modes (Home, Coffee shop, Paranoid and Under attack), a kill switch that cuts the internet but keeps the local network, six free public threat lists checked on the Mac, Parental Controls shields for whole categories of sites, a strip that names the app using the camera or microphone, alerts for unusual uploads to a country, and an Agent profile that learns where 19 AI agents such as Claude Code and Cursor normally connect and flags a first-ever destination. Rules export and import as a file. FireAI needs macOS 14 or later, on Apple silicon or Intel; on an Intel Mac its AI runs through the free Ollama app. It costs €49, $49 or £49 once for personal use, or €6 per Mac per month billed yearly for businesses, and every feature is free for 17 days without a card.
| Little Snitch 6.5 | FireAI 1.0.5 | |
|---|---|---|
| Outgoing connections | Alerts and rules | Prompts and rules |
| Incoming connections | Alerts and rules | No prompts; keep Apple’s firewall on |
| Rule precision | App, domain, port, protocol | App, host, domain, IP address, port |
| Identity from code signature | Yes | Yes |
| Review of apps with no rule yet | You decide, or Silent Mode | Optional on-device AI, or you decide |
| Plain-language orders | No | Yes, in 16 languages |
| Blocklists | Curated, updated daily | Six public threat lists, checked locally |
| Traffic history | Up to twelve months | Last seven days, searchable in plain language |
| Encrypted DNS | DoH, DoT, DoQ | No |
| Parental controls | No | Six category shields |
| Intel Macs | Yes, universal app | Yes, universal app (the AI through the free Ollama app) |
| Minimum macOS | 14 for version 6.5 | 14 |
| Price | One-time licence (gift card €59) | €49 once; business €6 per Mac per month |
| Trying it | Demo in restartable three-hour sessions | 17 days, every feature, no card |
Where Little Snitch is the better choice
- You want alerts for incoming connections too, not only outgoing ones.
- You want a year of history, rule subscriptions, encrypted DNS and a command-line tool in one product.
- You value a product refined over many years, with a large community of experienced users who share rules.
- You want to try it with no deadline: the demo can be restarted as often as you like.
Where FireAI is different
- An on-device reviewer handles first connections from apps you have never ruled on, shows why, and can always be overruled.
- You can give orders in plain language, in English, Arabic, Chinese or any of its 16 languages, and see the change before it is applied.
- Ready-made security modes, a kill switch and Parental Controls shields turn common situations into one click.
- An Agent profile watches AI coding agents and flags a first-ever destination or an upload spike, without reading your data.
- It names the app using your camera or microphone, and flags an unusual upload to a country while it happens.
Can you run both?
We advise against running them side by side. Each installs a network filter that sees every connection, and when two firewalls prompt about the same app it becomes hard to tell which rule decided. Try one at a time instead: Little Snitch’s demo and FireAI’s trial make that easy, and FireAI exports its rules to a file, so you keep what you built if you switch back later.
How to choose
Pick Little Snitch if you want inbound alerts and a year of history, or if you like writing exact rules and reading a detailed monitor. Pick FireAI if you want the firewall to do the first review itself, on your Mac, in your language, with every AI decision visible and reversible. Both answer the question that matters most, which app is talking to whom, and either is far better than leaving outgoing traffic unfiltered. Whichever you choose, keep Apple’s built-in firewall on for incoming connections.
How FireAI and HisnLabs fit in
If Little Snitch fits you better, we would still rather you run it than leave outgoing traffic unfiltered; if you want a reviewer that works on your own Mac, FireAI is free for 17 days.
FireAI is HisnLabs’ own product: an on-device AI firewall for Mac. It shows every connection your apps make, in plain language, and lets you decide what leaves your Mac — its AI runs locally, so your traffic is never sent to us or anyone else. HisnLabs’ security research team is the group that keeps that decision-making accurate: cataloguing which domains are ordinary telemetry versus a real product, tracking the country and network behind a connection, and training the on-device model (its FireAI Pilot feature) on real traffic patterns, all without any of it leaving your Mac.
You can read the technical decisions behind it, or try FireAI for 17 days, at FireAI, by HisnLabs.