Mac firewall comparison

Outbound vs Little Snitch

Pick Little Snitch if you want a mature firewall you can download today, with a traffic map, DNS encryption and automatic profile switching. Pick Outbound if your priority is per-app and per-host rules delivered to managed Macs with audit export, and you can wait for its release.

Updated

Published by Outbound, one of the products compared. This is a feature and workflow comparison, not an independent ranking or performance benchmark.

At a glance

CriterionOutboundLittle Snitch
Price and licenceClosed source. Personal $39 USD one time ($29 for the first 50 licences) with all 1.x and 2.x updates; family $59 USD for 5 Macs; Teams per seat, billed yearlyCommercial perpetual licence with paid upgrades for new major versions; Single, Family and Multi licences. Source availability: Not stated by the vendor
Per-app rulesSigned app by team and signing ID, or an exact pathRules per app; processes identified by code signature, with a path option
Host, domain and port rulesHost, domain (with subdomains), IP address, CIDR range or local network, plus ports and protocolLimit an app to specific servers, domains, ports or protocols; rules can cover incoming connections too
Alert behaviourAsk mode alert names the app, its developer from the signing certificate, port and protocol, and quotes an app’s Internet Access Policy when one is shipped (apps signed by a developer team or Apple). The rule can cover only this port, any port, or any port and protocol. Unanswered: allowed after 8 s (UDP) or 60 s (TCP) by default; TCP wait adjustable from 15 to 120 s, or block insteadIn Alert Mode, an alert for each connection no rule covers. An optional alert timeout applies a default action, like Silent Mode, if you do not answer
Silent modesLearn allows unmatched connections and adds them to Review; Strict blocks them. Your rules apply in every modeSilent allow and silent deny modes: when no rule matches, the connection is allowed or denied without an alert
Network monitorNetwork Monitor grouped by app, with Sent, Received and Last Seen columns, exact bytes per destination once a connection closes, a traffic chart where you can select a time window, search scoped by app, host, port, protocol, country, direction or rule, and a map of server locationsNetwork Monitor with a map, a traffic chart covering up to twelve months, and search by app, hostname, country or city
DNS encryptionNot included in v1; no DNS proxyIncluded, using DoH, DoT or DoQ
BlocklistsHosts, domain or CIDR lists over HTTPS, up to 200,000 entries per listCurated blocklists by topic with daily updates, including IP-based lists
ProfilesProfiles, switched with outboundctl; no SSID-based switching in v1Profiles that switch automatically when you join a known Wi-Fi network
Command lineoutboundctl: status, rules, export and import, profiles, blocklists, audit export, feed checksCommand line utility to change settings, export rules, respond to alerts and log allow or deny events
Managed deploymentSample MDM profiles, managed preferences, HTTPS rule feed (up to 50,000 rules, optional SHA-256 pin), JSON Lines audit exportExternally managed rule groups and a command line tool for remote administration. Support pages cover the Jamf system-extension policy; downloadable sample MDM profiles: Not stated by the vendor
macOS and release statusmacOS 14 or later, Apple silicon or Intel. Version 1.0, public downloadLittle Snitch 6.5, public download; runs on macOS 27 and is compatible with Tahoe, Sequoia and Sonoma. Older versions for macOS 13 and earlier

Competitor details: Little Snitch official product documentation, retrieved October 4, 2026.

Price and licence

Objective Development sells Single, Family (one household, up to 5 computers, non-commercial use) and Multi licences, each valid for Little Snitch 6 and Little Snitch 5. It is a perpetual licence with paid upgrades for new major versions. Check the seller’s order page for the current price in your region. Seller’s page.

Outbound personal is $39 USD one time ($29 for the first 50 licences) with all 1.x and 2.x updates. Family is $59 USD for 5 Macs. Personal covers 2 Macs; there is no trial. Outbound is closed source.

Where Little Snitch is the better choice

If you rely on DNS encryption or its network-history workflow, do not expect Outbound v1 to replace those features. Little Snitch also offers up to twelve months of traffic history, curated blocklists, profiles that follow your Wi-Fi network, rules for incoming connections and sound notifications.

Is Little Snitch worth it, and does it slow down a Mac?

It is worth paying for if you will use what it adds beyond rules: the map, long traffic history, DNS encryption and automatic profile switching. You can find out first, because without a licence key Little Snitch runs in a demo mode with the same protection for three hours at a time, which you can restart, and its Network Monitor expires after 30 days. The vendor notes a slight performance impact only for its optional Endpoint Security extension, which is involved in each file open. Outbound has no benchmark for either app, so watch your own Mac during the demo.

Where Outbound may fit better

Outbound offers an HTTPS managed rule feed with an optional SHA-256 pin, up to 50,000 managed rules, and complete-line JSON Lines audit export. Objective Development says syncing Little Snitch rules and profiles between computers is currently not possible, although it supports remote rule groups. Outbound’s personal licence includes all 1.x and 2.x updates. Teams are per seat, billed yearly, with pricing by contact.

Alert behaviour is part of the decision

In Outbound’s Ask mode, unanswered UDP connections are allowed after 8 seconds and TCP after 60 seconds by default; you can have them blocked instead. Strict mode blocks unmatched connections. Compare that behaviour with the mode you use today. When an app signed by a developer team or Apple ships an Internet Access Policy, the format Little Snitch uses, Outbound’s alert quotes the developer’s stated purpose and what happens if you deny.

Migration notes

Outbound has no Little Snitch rule importer. Make a backup with Little Snitch’s Create Backup command, keep it, then re-create and test the rules you need. On macOS 15.3, Objective Development says to delete the Little Snitch network extension in System Settings before moving the app to the Trash. Outbound has no live compatibility results yet; minimum macOS requirements do not establish compatibility with a VPN or another filter.

A note on fairness

Outbound wrote this page and is one of the two products compared. Little Snitch has been around for more than 20 years and can be tried before buying; Outbound is closed source and has no trial. Where Objective Development does not state a detail, the table says so.

Comparing the other two directly? Read Little Snitch vs LuLu.

Before you switch

  1. Export your existing policy for reference.
  2. Choose a small set of essential app connections and re-create them in the new product.
  3. Test on your macOS build, with your VPN and required management software.
  4. Keep the old policy and removal instructions available until you have tested the new setup.