Sandboxie built its reputation by wrapping individual Windows processes so a risky installer, a sketchy browser session, or an untrusted document could not touch the host filesystem or registry. The original commercial Sandboxie has been retired, and the project lives on as the open-source Sandboxie-Plus maintained by David Xanatos. The engine is the same, which means the same compatibility quirks travel with it: some installers refuse to run under the hook, some games trip anti-cheat checks, and newer Windows kernel features occasionally outpace the driver. There is also no native macOS or Linux build, so cross-platform users need a different answer entirely. We tested seven Sandboxie alternatives on Windows 11 to see which ones match the isolation without the friction.
Quick comparison
| App | Best for | Free plan | Starting price | Standout feature |
|---|---|---|---|---|
| Windows Sandbox | Disposable OS-level isolation on Pro and Enterprise | Yes | Free with Windows Pro | Fresh Windows instance every launch |
| Sandboxie-Plus | The closest direct successor to classic Sandboxie | Yes | Free (Plus supporter from $10) | Same process-wrapping engine, open source |
| Shadow Defender | On-write isolation that resets the whole system on reboot | Trial | $39 one-time | Shadow Mode rolls back every change |
| VirtualBox | Full free virtualization for any workload | Yes | Free | Snapshots and cross-platform host support |
| VMware Workstation Player | Polished VM with strong device passthrough | Yes | Free for personal use | 3D acceleration and USB 3.1 passthrough |
| BufferZone Pro | Browser and email isolation with policy controls | No | Contact sales | Endpoint-focused virtual container |
| Comodo Internet Security | Antivirus suite with a built-in sandbox | Yes | Free | Auto-sandboxes unknown executables |
Why people leave Sandboxie
The most cited friction is compatibility. The hooking approach that lets Sandboxie wrap a process per box also means newer kernel features, anti-cheat drivers, and certain installers refuse to cooperate. Users who relied on the original commercial Sandboxie were forced to migrate to Sandboxie-Plus when Sophos open-sourced the code, and the Plus UI rework changed muscle memory for advanced workflows. Windows-only support is the other half of the story: anyone running a mixed fleet with macOS or Linux machines needs a second tool regardless. Some power users also want stronger isolation than process wrapping can give, since a kernel exploit inside a sandboxed process is still running on the host kernel. A full VM or an OS-level container closes that gap, which is why the alternative conversation usually splits between “lighter and simpler” and “stronger and heavier.”
The alternatives
Windows Sandbox — Best for disposable OS-level isolation on Pro and Enterprise
Windows Sandbox ships as an optional Windows feature on Pro, Enterprise, and Education editions. Each launch spins up a fresh, lightweight Windows instance with hardware-based virtualization, and everything inside is discarded when the window closes. The container shares the host’s installation image rather than downloading a separate ISO, which keeps the footprint small.
Where it falls short: Not available on Windows Home. No persistence between sessions without a custom WSB config file. Limited GPU acceleration for graphics-heavy workloads.
Pricing: Free with Windows 11 Pro, Enterprise, or Education.
Vs Sandboxie: Stronger isolation through hardware virtualization, no per-process configuration, no persistence by default.
Download: Enable via Windows Features. See microsoft.com/windows for documentation.
Bottom line: Pick Windows Sandbox if you have Pro or Enterprise and want disposable isolation with zero configuration.
Sandboxie-Plus — Best for the closest direct successor
Sandboxie-Plus is the open-source continuation of the original Sandboxie engine, maintained by David Xanatos under GPLv3. The classic process-wrapping behaviour is intact, the configuration files are forward-compatible, and the new Qt-based UI adds box templates, snapshot management, and a more legible sandbox tree.
Where it falls short: Inherits the same compatibility quirks as the original. Some advanced features sit behind a supporter certificate that unlocks the Plus tier. Still Windows-only.
Pricing: Free under GPLv3. Supporter certificate from $10 for Plus features.
Vs Sandboxie: It is Sandboxie, kept alive and modernised. The closest one-to-one migration.
Download: sandboxie-plus.com
Bottom line: Pick Sandboxie-Plus if your workflow already maps to Sandboxie boxes and you want continuity.
Shadow Defender — Best for whole-system rollback on reboot
Shadow Defender takes a different angle. Instead of wrapping individual processes, it puts the entire system into Shadow Mode: every write is redirected to a virtual buffer, and a reboot rolls the machine back to its pre-Shadow state. Anything that happens during a session, including malware infections or accidental file deletions, is wiped on restart.
Where it falls short: Coarse-grained by design. Anything you want to keep needs to be saved to an excluded folder before reboot. No per-app isolation.
Pricing: 30-day trial. License at $39 one-time for one PC.
Vs Sandboxie: Stronger blast radius protection at the cost of granularity. Better fit for kiosks and test rigs.
Download: shadowdefender.com
Bottom line: Pick Shadow Defender if you want the whole machine to forget the session on reboot.
VirtualBox — Best for free, full virtualization
VirtualBox is the long-running Oracle-maintained type-2 hypervisor. A full guest OS runs in its own kernel with its own filesystem, network stack, and snapshots. Anything inside a VM stays inside the VM, and snapshots let you roll back to a known-good state in seconds.
Where it falls short: Heavier than a sandbox by every measure: RAM, disk, boot time. 3D acceleration is limited compared to commercial hypervisors. The Extension Pack uses a separate personal-use license.
Pricing: Free under GPLv3. Extension Pack free for personal evaluation use.
Vs Sandboxie: Far stronger isolation through a separate kernel. Far heavier setup and resource use.
Download: virtualbox.org
Bottom line: Pick VirtualBox if you want full virtualization without paying for it.
VMware Workstation Player — Best for a polished free VM
VMware Workstation Player went free for personal use in 2024, and the experience is closer to the paid Workstation Pro than VirtualBox’s free build. 3D acceleration, USB 3.1 passthrough, and the device manager all feel smoother, and Windows guests boot noticeably faster on the same hardware.
Where it falls short: Personal-use only on the free tier. Commercial use still requires a paid license. Only runs one VM at a time on the free build.
Pricing: Free for personal use. Workstation Pro for commercial use, contact sales for pricing.
Vs Sandboxie: Same full-VM trade-off as VirtualBox, with a more polished UI and better hardware support.
Download: vmware.com
Bottom line: Pick VMware Player if you want the smoothest free VM experience for personal testing.
BufferZone Pro — Best for browser and email isolation with policy controls
BufferZone Pro focuses on the two attack surfaces most home and SMB users actually use: the browser and the email client. Both run inside a virtual container that isolates downloads, blocks credential theft, and prevents writes to the host beyond a controlled extraction folder. Policies are managed centrally, which makes it a fit for small fleets.
Where it falls short: Aimed at endpoints rather than per-process testing. No public free tier for individual users. Less granular than Sandboxie for general application isolation.
Pricing: Quoted by deployment. Contact sales for endpoint and team pricing.
Vs Sandboxie: More focused on browser and email rather than arbitrary processes, better for managed endpoints.
Download: bufferzonesecurity.com
Bottom line: Pick BufferZone Pro if browser and email isolation across a small fleet is the actual goal.
Comodo Internet Security — Best for an antivirus suite with a built-in sandbox
Comodo Internet Security bundles a real-time antivirus, a firewall, and an automatic containment sandbox that runs unknown executables in an isolated layer until they prove safe. The free build covers all three on a single Windows machine, which makes it the only entry on this list that also handles signature-based detection.
Where it falls short: Heavier client than Defender. Auto-containment occasionally puts trusted apps in the sandbox and needs whitelisting. UI density is higher than a typical home suite.
Pricing: Free for personal use on Windows.
Vs Sandboxie: Sandbox plus antivirus in one client, less granular per-process control than Sandboxie-Plus.
Download: comodo.com
Bottom line: Pick Comodo Internet Security if you want the sandbox bundled with a free antivirus.
How to choose
Pick Windows Sandbox if you run Windows 11 Pro or Enterprise and a disposable session per launch covers the workload. Pick Sandboxie-Plus if your existing boxes, scripts, or muscle memory are tied to the classic Sandboxie engine and you want the continuity. Pick Shadow Defender if rolling the whole machine back on reboot fits the test rig or kiosk pattern better than per-app isolation. Pick VirtualBox when full virtualization with snapshots is the right tool and the budget is zero. Pick VMware Workstation Player if you want the same full-VM isolation with a more polished personal-use UI. Pick BufferZone Pro if isolating the browser and email across a small managed fleet is the actual goal. Pick Comodo Internet Security if a built-in sandbox alongside antivirus and a firewall is a better fit than a dedicated isolation tool. Stay on Sandboxie-Plus if its open-source roadmap and per-process granularity remain the right shape for the work.
FAQ
Is Sandboxie-Plus the same as the original Sandboxie? It is the open-source continuation of the same engine, maintained by David Xanatos after Sophos open-sourced the code. Configuration files port forward, and the classic UI is still available alongside the new Plus UI.
Is Windows Sandbox stronger isolation than Sandboxie? Yes. Windows Sandbox uses hardware-based virtualization to run a separate Windows instance, while Sandboxie wraps processes on the host kernel. Stronger blast-radius containment, less granularity for per-app testing.
Can a full VM replace Sandboxie for safe testing? For most safe-testing tasks, yes. VirtualBox or VMware Workstation Player give you snapshots, a separate kernel, and rollback in seconds. The trade-off is higher RAM and disk use and slower boot than wrapping a single process.
Does any Sandboxie alternative run on macOS or Linux? VirtualBox and VMware run on both. The process-wrapping sandboxes on this list are Windows-only. macOS users typically lean on the built-in App Sandbox and Gatekeeper, while Linux users use Firejail or bubblewrap for similar per-process isolation.
Should I run an antivirus alongside a sandbox? Yes. Sandboxes contain damage during a session, antivirus catches known threats before they run. The two complement each other, and Comodo Internet Security is the only entry on this list that combines them in a single client.
