Baponi alternatives
The 6 alternatives below are grouped by kind of sandbox, and each says what it does differently from Baponi. Start from whatever made you look: missing GPUs, session limits, self-hosting, pricing or isolation.
Why teams look beyond Baponi
A fast, stateless-by-default execution API with bucket-backed state, best for interpreter-style bursts rather than long-lived agent workspaces.
- OS-level isolation (nsjail) shares the host kernel; there is no microVM option.
- Executions are capped at 60 s on Free and 1 hour on Pro; no long-lived processes.
- No compliance certification yet; SOC 2 Type 1 work starts Q4 2026.
- Only a Python SDK is documented; no TypeScript SDK.
Baponi alternatives, by kind
Hosted sandbox platforms
SDK-driven sandboxes you create, run code in and destroy through an API.
E2B
Open-source cloud sandboxes for AI agents, each a Firecracker microVM, with pause/resume, snapshots and forking.
- Firecracker microVM
- Open source
- Self-hostable
- BYOC
- Pause/resume
How it differs: Code interpreters and short-to-medium-lived agent tasks that need microVM isolation, with an open-source self-host path. The safe default for most agent builders: mature, open source, microVM-isolated and widely supported.
HopX
Firecracker microVM sandboxes from Bunnyshell with template-based sizing, memory-preserving pause, VNC desktop automation, an MCP server and $200 of free credits.
- Firecracker microVM
- Pause/resume
How it differs: Pay-per-second microVM sandboxes with desktop automation and no session limits. A simple per-second Firecracker sandbox with desktop tooling, documented more thinly on security and regions than its larger peers.
Persistent VMs and agent computers
Full, long-lived virtual machines that an agent keeps, forks and returns to.
Upstash Box
Persistent Docker-container "boxes" for coding agents with Claude Code, Codex, OpenCode and Cursor built in, billed on active CPU time rather than wall-clock.
- Docker container
- Pause/resume
How it differs: Long-lived per-user coding-agent workspaces where idle time should cost nothing. A persistent, CPU-time-billed workspace for coding agents that trades VM isolation for cheap idle time.
Compute platforms with sandboxes
General serverless or app platforms that also offer sandboxes, often with GPUs.
Modal Sandboxes
Sandboxes on Modal’s serverless compute platform for running untrusted code at very high scale, with GPUs, snapshots and tunnels.
- gVisor or VM
- GPU
- Pause/resume
How it differs: High-concurrency and GPU-backed sandboxes — RL rollouts, evals and coding agents at scale. The best fit when scale or GPUs matter most, especially for teams already on Modal.
Code execution APIs
Submit code, get output: online judges, compiler APIs and Jupyter kernels as a service.
Codapi
Lightweight Apache-2.0 sandbox server (a 3 MB Go binary) that runs each snippet in a locked-down Docker container, built for interactive documentation, with a hosted cloud at $5/month and free self-hosting.
- Locked-down Docker container
- Open source
- Self-hostable
How it differs: Embedding runnable snippets in docs and courses, or a tiny self-hosted run-code endpoint with strict defaults. The simplest well-hardened run-code server to self-host; fine for doc snippets and stateless tool calls, not for agent workspaces.
Judge0
Open-source online code execution system (GPL-3.0) that runs each submission in an isolate sandbox, offered as Judge0 Cloud via RapidAPI or directly and as a self-hosted Docker Compose stack.
- isolate (namespaces/cgroups)
- Open source
- Self-hostable
How it differs: Batch "submit code, get stdout" judging in 60-90+ languages with per-submission CPU, wall-clock and memory limits. The reference open-source online judge: ideal for stateless, time-boxed code evaluation at scale, but not a workspace an agent can return to.
Baponi vs alternatives
| Sandbox | Isolation | Open source | Self-host / BYOC | Cold start (vendor) | Max session | Snapshots / pause | GPU | SDKs |
|---|---|---|---|---|---|---|---|---|
| Baponi | nsjail (OS-level) | No | Yes / Yes | <20 ms (claim) | 60 s / 1 h (Pro) | Not documented / No | Not documented | Python, REST API, MCP server |
| Codapi | Locked-down Docker container | Yes | Yes / No | 1-3 s per run (claim) | 5 s default | No / No | No | REST API, JavaScript/TypeScript |
| E2B | Firecracker microVM | Yes | Yes / Yes | Not documented | 1 h / 24 h (Pro) | Yes / Yes | No | Python, JavaScript/TypeScript |
| HopX | Firecracker microVM | No | No / No | ~100 ms (claim) | No cap | Not documented / Yes | Not documented | Python, JavaScript/TypeScript, CLI, REST API, MCP server |
| Judge0 | isolate (namespaces/cgroups) | Yes | Yes / No | Not documented | 5 s wall (max 20 s) | No / No | No | REST API, Python, JavaScript/TypeScript |
| Modal Sandboxes | gVisor or VM | No | No / Not documented | <1 s | Up to 24 h | Yes / Yes | Yes | Python, JavaScript/TypeScript, Go |
| Upstash Box | Docker container | No | No / No | Not documented | No cap (idle pause 1 h / 6 h) | Yes / Yes | No | JavaScript/TypeScript, Python, CLI, MCP server |
Frequently asked questions
Cite this page
Agent Sandboxes. (2026). Baponi alternatives. agentsandboxes.org. Last reviewed November 9, 2026. https://agentsandboxes.org/alternatives/baponi/
Found an error or a missing sandbox? Submit a correction — every entry links to the sources it relies on.