LuLu

Spec sheet

Purpose

LuLu is a free, open-source firewall that alerts about and blocks unknown outgoing network connections.Read 11 Oct 2026 · objective-see.org

Free plan

YesRead 22 Sep 2026 · objective-see.org

Privacy

The maker says LuLu's automatic version check sends no user or product information, and the check can be disabled in settings.Read 11 Oct 2026 · objective-see.org

Support

The maker directs users to create bug reports through LuLu's GitHub repository.Read 11 Oct 2026 · objective-see.org

Maker

Objective-See describes itself as a nonprofit foundation focused on macOS security and free, open-source tools.Read 11 Oct 2026 · objective-see.org

Alerts

Alerts show the process and destination, and can display code-signing details and process origins.Read 11 Oct 2026 · objective-see.org

Compatibility

The product page lists macOS 10.15 or later as the platform requirement.Read 11 Oct 2026 · objective-see.org

Lists

Allow and block lists can use local files or remote URLs, and block-list matches take priority when both lists are configured.Read 11 Oct 2026 · objective-see.org

Network monitor

LuLu packages Objective-See's Netiquette network monitor, which can be opened from the status-bar menu.Read 11 Oct 2026 · objective-see.org

Network scope

LuLu monitors outgoing traffic, and some traffic may not pass through macOS Network Extensions and therefore may not be visible or blockable by LuLu.Read 11 Oct 2026 · objective-see.org

Profiles

Profiles keep separate rules and settings, and only the active profile is used to make connection decisions.Read 11 Oct 2026 · objective-see.org

Rules

Rules can allow or block connections for a process or a specific remote endpoint, with permanent or temporary durations.Read 11 Oct 2026 · objective-see.org

VirusTotal

LuLu opens a VirusTotal lookup only when the user clicks the alert button, using a URL that includes the item's hash.Read 11 Oct 2026 · objective-see.org

Plans and prices

Every LuLu plan and price →

Where Specifiction places it

• Antivirus for Mac#17 of 437.4
• Firewall Software#67 of 817.3