The best open source alternative to Sandboxie Plus is Firejail. If that doesn't suit you, our users have ranked more than 10 alternatives to Sandboxie Plus and ten of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Sandboxie Plus are Shelter, Cuckoo Sandbox, Island and Sandboxie.
Firejail is a SUID security sandbox program that reduces the risk of security breaches by restricting the running environment of untrusted applications using Linux namespaces and seccomp-bpf.
Shelter is a Free and Open-Source (FOSS) app that leverages the “Work Profile” feature of Android to provide an isolated space that you can install or clone apps into.
Cuckoo Sandbox is a modular, automated malware analysis system. Running from command-line on a Linux or Mac host, it uses python and virtualization (VirtualBox, QEMU-KVM, etc) to create an isolated Windows guest environment to safely and automatically run and analyze files to...
Sandbox environment to clone selected apps and isolate them from accessing your personal data.
PhoneProfilesPlus allows automatically or with one click configuring the device for life situations (at home, at work, in your car, sleep outside…).
Some apps need or force storage permission : SeekPrivacy hides what they don’t need to see. Even if you grant all-files access, your private files stay invisible, but you can still access them normally.
Mbox is a lightweight sandboxing mechanism that any user can use without special privileges in commodity operating systems.
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Easy to use, and has a very good, but really ugly GUI.