Alternatives to GlassWire

Network monitor and firewall with a visual traffic history. The listings below can replace it for an important use case. Each note says what changes if you switch.

Replacements

Listings that take over the same core job as GlassWire.

  • Portmaster

    Shows every connection each application makes and lets you block any of them, with sensible defaults already set.

    FreemiumOpen sourceWindowsLinux

    Portmaster is open source under GPL-3.0, runs on Windows and Linux instead of Android, and blocks trackers by default, with network history search as a paid feature.

  • simplewall

    Puts a plain list of programs in front of the Windows Filtering Platform, so you decide what is allowed online.

    FreeOpen sourceWindows

    simplewall is a free GPL-3.0 Windows tool that uses a plain allow and block list on the Windows Filtering Platform, without GlassWire's visual traffic history or Android app.

  • NetGuard

    No-root Android firewall that blocks internet access per app.

    FreemiumOpen sourceAndroid

    NetGuard is an open-source Android firewall that blocks apps without root, but it occupies the VPN slot and offers no Windows version.

  • Little Snitch

    macOS application firewall that prompts on outgoing connections.

    PaidProprietarymacOS

    Little Snitch moves you to macOS, with a one-time paid licence, per-application outbound prompts and a network monitor showing which process connects where.

  • OpenSnitch

    An interactive application firewall for Linux that asks before letting any program make an outbound connection.

    FreeOpen sourceLinux

    OpenSnitch is a free GPL-3.0 Linux application firewall that prompts on every new outbound connection and can manage several machines from one interface.

  • LuLu

    Control outbound application connections on macOS.

    FreeOpen sourcemacOS

    LuLu is a free, open-source GPL-3.0 outbound firewall for macOS, so switching means leaving Windows and Android and losing the visual traffic history.

  • AFWall+

    iptables firewall for rooted Android with per-app rules.

    FreeOpen sourceAndroid

    AFWall+ is a free GPL-3.0 iptables firewall for Android that needs root but does not use the VPN slot, and has no Windows version.

  • TinyWall

    A free, lightweight firewall controller for Windows that works without pop-up prompts.

    FreeProprietaryWindows

    TinyWall is a free Windows firewall controller with no pop-up prompts and no kernel components, but programs must be allowed manually and it lacks traffic graphs.

Also worth comparing

These listings name GlassWire as their own alternative, so the relationship runs both ways.

  • Fort Firewall

    Open-source per-application firewall for Windows built on its own filtering driver.

    FreeOpen sourceWindows

    GlassWire adds a visual traffic history and first-connection alerts on Windows and Android, with longer retention and features behind a paid licence.

  • Windows Firewall Control

    A tray tool that extends Windows Firewall with outbound connection prompts and quick filtering modes.

    FreeProprietaryWindows

    GlassWire is a freemium closed-source firewall and network monitor for Windows and Android with a visual traffic history, some features requiring a paid licence.

Similar software

Related functionality, not a direct replacement.