OpenSnitch
Open-source alternative to Little Snitch
OpenSnitch is a Linux application firewall and an open-source alternative to Little Snitch. It watches outbound network connections from your apps and asks you to allow or block them, giving you control over which programs can phone home. It is made for Linux users who want to see and manage what their software sends over the network.
Key features
- Application firewall for Linux
- Outbound connection control
- Interactive allow-or-block prompts
Before you switch
Privacy tools deserve extra scrutiny — you’re trusting them with sensitive data. Prefer projects with published security audits, reproducible builds, and a clear threat model in their docs. Open source lets anyone inspect the code, which is exactly what you want from software that guards your passwords, traffic, or files.
Like every project on OpenShelf, OpenSnitch is developed in the open — you can read the code, follow development, and even contribute. Check the system requirements and the project’s own documentation linked on this page before installing.