OpenSnitch is a GNU/Linux interactive application firewall inspired by Little Snitch.
Per-application connection prompts and rules on Linux.
alternatives to
Little Snitch
macOS firewall that asks which apps may connect to which servers. A closed product from Objective Development.
Side by side
| Tool | Fit | Stars | Licence | Terms | Self-hosted | Language | Latest | Last push |
|---|---|---|---|---|---|---|---|---|
| OpenSnitch | Full replacement | 14k | GPL-3.0 | Open source | No | Python | v1.8.0 | 2026-07-26 |
| Portmaster | Full replacement | 14k | GPL-3.0 | Open source | No | Go | v2.2.3 | 2026-10-06 |
| LuLu | Partial | 13k | GPL-3.0 | Open source | No | Objective-C | v4.5.1 | 2026-10-04 |
Every alternative
3 alternatives
🏔 Love Freedom - ❌ Block Mass Surveillance
Per-application network rules and connection history on Windows and Linux.
LuLu is the free open-source macOS firewall
Blocks unknown outgoing connections per application on macOS, with fewer rule options and no traffic map.
- Language
- Objective-C
- Licence
- GPL-3.0
- Stars
- 13k
- Latest
- v4.5.1
- Last push
- 2026-10-04
Head to head
About Little Snitch
- Vendor
- Objective Development