bubblewrap alternatives
The 5 alternatives below are grouped by kind of sandbox, and each says what it does differently from bubblewrap. Start from whatever made you look: missing GPUs, session limits, self-hosting, pricing or isolation.
Why teams look beyond bubblewrap
The right primitive for a laptop or CI sandbox on Linux when you can write the policy yourself; not a substitute for a VM.
- Shares the host kernel; it is not a kernel boundary like gVisor or a microVM
- No built-in policy: the README warns that anything you mount in can be an escalation path
- Linux only, and the host must allow unprivileged user namespaces
- No snapshots, resource limits or lifecycle management
bubblewrap alternatives, by kind
Isolation primitives and runtimes
The hypervisors, user-space kernels, OS sandboxes and WebAssembly runtimes that sandbox platforms build on.
Firejail
A SUID Linux sandbox that confines desktop and server applications with namespaces, seccomp-bpf and capabilities, shipping around 1,350 application profiles.
- Namespaces + seccomp
- Open source
- Self-hostable
How it differs: Confining a browser or desktop application on a Linux workstation with ready-made profiles. The convenient choice for confining desktop applications on a Linux laptop; not designed as a server-side sandbox primitive.
gVisor
Google's user-space application kernel for containers, with the runsc OCI runtime, GPU passthrough via nvproxy and checkpoint/restore; used by Modal, Beam, Anthropic, OpenAI and Google Cloud.
- User-space kernel
- Open source
- Self-hostable
- GPU
- Snapshots
How it differs: Sandboxing containers on hosts where you cannot or do not want to run a VM per workload, including GPU workloads. The most widely adopted non-VM sandbox boundary; choose it when a VM per workload is impractical or you need sandboxed GPUs.
nsjail
A Linux process isolation tool combining namespaces, cgroups, rlimits and Kafel seccomp-bpf policies, with listen, once and rerun modes for untrusted programs.
- Namespaces + seccomp
- Open source
- Self-hostable
How it differs: Running untrusted programs or network services under tight syscall, memory and CPU limits on Linux. A strong OS-level jail for execution APIs and CTF-style workloads; pair it with a VM when you need a kernel boundary.
Local sandboxes for coding agents
Isolation for agents like Claude Code, Codex or Gemini CLI on your own laptop.
Anthropic Sandbox Runtime
Open-source CLI and library (`srt`) that restricts filesystem and network access for any local process at the OS level, without a container or VM.
- OS-level (Seatbelt / bubblewrap)
- Open source
- Self-hostable
How it differs: Lightweight local sandboxing of coding agents and CLI tools. Excellent lightweight guardrail for local agents; pair with a VM for untrusted multi-tenant code.
nono
Kernel-enforced OS-native sandbox for coding agents that runs each tool call in its own ephemeral sandbox, brokers credentials and keeps a tamper-evident audit chain.
- Landlock / Seatbelt
- Open source
- Snapshots
How it differs: Running Claude Code, Codex and other coding agents on your own machine with kernel-enforced file and network allow-lists and brokered credentials. A strong choice for per-tool-call policy and credential brokering around local coding agents, provided OS-level isolation is enough for your threat model.
bubblewrap vs alternatives
| Sandbox | Isolation | Open source | Self-host / BYOC | Cold start (vendor) | Max session | Snapshots / pause | GPU | SDKs |
|---|---|---|---|---|---|---|---|---|
| bubblewrap | Linux namespaces | Yes | Yes / No | Not documented | Not documented | No / No | Not documented | CLI |
| Anthropic Sandbox Runtime | OS-level (Seatbelt / bubblewrap) | Yes | Yes / Not documented | Process start | Not documented | No / No | Not documented | CLI (srt), TypeScript (npm) |
| Firejail | Namespaces + seccomp | Yes | Yes / No | Not documented | Not documented | No / No | Not documented | CLI |
| gVisor | User-space kernel | Yes | Yes / No | ms (claim) | Not documented | Yes / Not documented | Yes | CLI |
| nono | Landlock / Seatbelt | Yes | No / No | Not documented | Not documented | Yes / Not documented | Not documented | CLI, Rust, Python, JavaScript/TypeScript, Go |
| nsjail | Namespaces + seccomp | Yes | Yes / No | Not documented | Configurable | No / No | Not documented | CLI |
Frequently asked questions
What are the main alternatives to bubblewrap?
Is there an open-source alternative to bubblewrap?
Cite this page
Agent Sandboxes. (2026). bubblewrap alternatives. agentsandboxes.org. Last reviewed November 9, 2026. https://agentsandboxes.org/alternatives/bubblewrap/
Found an error or a missing sandbox? Submit a correction — every entry links to the sources it relies on.