# Little Snitch

> Network monitor and application firewall that alerts you when an app connects and lets you allow or deny it

Source: https://optioncmd.com/little-snitch
Website: https://www.obdev.at/products/littlesnitch/?utm_source=optioncmd
Pricing: Paid
Categories: [Security & privacy](https://optioncmd.com/categories/security-privacy.md)
Listed: 2026-10-27
Updated: 2026-10-27

Little Snitch is a network monitor and personal application firewall for Mac. It shows where your Mac connects to on the internet and asks you to allow or deny each new connection.

**Key features:**

- Connection alerts appear whenever an app tries to connect, and Silent Mode allows new connections at first so you can decide later.
- The Network Monitor groups traffic by app, domain or country and shows data volumes, server locations, ports and protocols.
- An interactive traffic chart covers up to twelve months of network activity.
- Rules can be limited to specific servers, domains, ports or protocols, organized into rule groups, and switched automatically with profiles per Wi-Fi network.
- Curated blocklists, including IP-based lists, can be turned on in a few clicks and update daily.
- DNS requests are encrypted with DoH, DoT or DoQ through trusted services such as Quad9.
- A command line utility can change settings, export rules, respond to alerts and log allow and deny events.

Little Snitch is available as a free download from Objective Development, and a license key turns it into the full version. Without a key it runs in demo mode with full protection for three hours at a time, as often as you like, while the Network Monitor expires after 30 days.

## More security & privacy apps

- [1Password](https://optioncmd.com/1password.md): Password manager that autofills logins, cards and passkeys in your browser and Mac apps
- [Bitwarden](https://optioncmd.com/bitwarden.md): Open-source password manager with end-to-end encryption, passkeys and encrypted sharing through Send
- [Mullvad VPN](https://optioncmd.com/mullvad-vpn.md): Privacy-focused WireGuard VPN with a flat monthly price and anonymous accounts
- [Proton Pass](https://optioncmd.com/proton-pass.md): End-to-end encrypted password manager with hide-my-email aliases, from the makers of Proton Mail
- [LuLu](https://optioncmd.com/lulu.md): Free, open-source firewall that blocks unknown outgoing connections and asks before new apps go online
- [Signal](https://optioncmd.com/signal.md): Desktop app for the Signal private messenger, linked to Signal on your phone
- [Arq](https://optioncmd.com/arq.md): Encrypted, versioned backup to your own cloud storage, NAS or external drive
- [Cryptomator](https://optioncmd.com/cryptomator.md): Free, open-source encryption for files in cloud storage, using password-protected vaults
- [Backblaze Computer Backup](https://optioncmd.com/backblaze.md): Unlimited, automatic cloud backup for your Mac and external drives