LuLu
Free, open-source firewall for macOS that blocks unauthorized outgoing connections.
Alternatives
Choose Portmaster if…
- you need a firewall that runs on Windows or Linux
- you want system‑wide DNS ad and tracker blocking
- you must isolate a single app from the internet completely
- you are comfortable with a freemium model that includes an
Choose Little Snitch if…
- you need built‑in DNS encryption for privacy
- you want interactive charts to visualize outbound traffic
- you prefer a one‑time purchase over a free but
- you rely on curated blocklists that update daily
How to Decide
LuLu is a free, open‑source firewall for macOS that blocks unauthorized outgoing connections and is used by Mac users who want granular control over outbound traffic. The alternatives split into a few clear camps: Little Snitch leans on a one‑time paid model with built‑in DNS encryption and curated blocklists; Portmaster offers a freemium model with system‑wide DNS‑level ad and tracker blocking on Windows and Linux.
When comparing these tools, focus on the pricing model (free vs one‑time purchase vs freemium), platform support (macOS‑only vs Windows/Linux compatibility), the specific network‑control features each emphasizes (DNS encryption and blocklists versus ad‑tracker blocking), and the open‑source status of the codebase, as these directly affect cost, deployment environment, privacy capabilities, and transparency.
All Alternatives
“LuLu is a free, open‑source macOS firewall that blocks unauthorized outbound connections, mirroring Portmaster's functionality on Mac.”
“Same macOS outbound‑connection firewall purpose, just a paid alternative to LuLu”
About the Product
Is this your tool?
Claim this page to update details, reply to user reviews, and drive more traffic to your product.
Claim this Product →