8 Best OpenSandbox Alternatives in 2026 (Open Source)
OpenSandbox — Secure, Fast, and Extensible Sandbox runtime for AI agents. Provides high-performance Firecracker-based sandboxes with pause/resume capabilities and unified API for both local Docker and Kubernetes deployments.
These 8 open-source tools do the same job. They are ordered by how closely they match OpenSandbox, with live GitHub data so you can see which projects are actively maintained.
| Tool | GitHub stars | Stars / 30d | Last commit |
|---|---|---|---|
| OpenSandbox(original) | 15.6k | +1,301 | 2026-09-30 |
| E2B | 14.1k | +415 | 2026-09-30 |
| e2b | 2.4k | +26 | 2026-09-30 |
| Daytona | 71.7k | +5,973 | 2026-06-25 |
| herdr | 41.6k | +3,470 | 2026-09-30 |
| Orca | 82.3k | +6,855 | 2026-09-30 |
| Steel | 7.7k | +156 | 2026-09-28 |
| NemoClaw | 22.6k | +1,884 | 2026-09-30 |
| Cua | 27.5k | +2,296 | 2026-09-30 |
1. E2B
Open-source, secure environment with real-world tools for enterprise-grade agents.
What sets it apart: Purpose-built sandboxed execution for AI-generated code with sub-second startup — vs generic containers which require more setup and have slower cold starts
Best for: Running untrusted AI-generated code safely; Building code execution features into AI applications
2. e2b
Python & JS/TS SDK for running AI-generated code/code interpreting in your AI app
What sets it apart: Purpose-built cloud infrastructure for AI-generated code execution — secure sandboxes designed specifically for LLM output, not repurposed containers
Best for: AI apps needing safe code execution from LLM outputs; Building AI coding assistants with runnable code; Data analysis agents that generate and run Python
3. Daytona
Daytona is a Secure and Elastic Infrastructure for Running AI-Generated Code
What sets it apart: Provides full composable computers with complete isolation that spin up in under 90ms for AI agent workflows.
Best for: running AI-generated code securely; building agent workflows; maintaining persistent agent environments
4. herdr
the runtime your coding agents live on
What sets it apart: Provides a persistent runtime environment specifically optimized for coding agents that can survive client disconnections and machine restarts.
Best for: Developers building coding agents; Teams running multiple AI coding assistants; Managing persistent agent sessions across machines
5. Orca
Orca is the ADE for working with a fleet of parallel agents. Run any coding agent with your own subscription. Available on desktop, mobile and remote runtime.
What sets it apart: Enables parallel execution of multiple coding agents in isolated worktrees with comparison and merging capabilities.
Best for: Developers comparing multiple AI coding agents; Teams managing fleets of parallel agents; Remote execution of coding workflows
6. Steel
🔥 Open Source Browser API for AI Agents & Apps. Steel Browser is a batteries-included browser sandbox that lets you automate the web without worrying about infrastructure.
What sets it apart: Purpose-built browser infrastructure for AI agents — combines session management, stealth, proxy rotation, and Puppeteer/Playwright compatibility in one API
Best for: AI agents needing real web browsing capabilities; Web scraping with anti-detection requirements; Browser automation tools needing managed sessions
7. NemoClaw
Run agents like Hermes, LangChain Deep Agents, and OpenClaw more securely inside NVIDIA OpenShell with managed inference
What sets it apart: Provides a managed, secure execution environment for AI agents using NVIDIA's OpenShell sandbox technology with guided deployment and lifecycle management.
Best for: running AI agents securely in sandboxes; managed agent deployments; enterprise agent safety
8. Cua
Scale computer-use 2.0 with open-source drivers, cross-OS fleets, and benchmarks for training, evaluation, and data generation.
What sets it apart: Provides comprehensive infrastructure for computer-use 2.0 agents that move between code, APIs, and graphical interfaces within the same task.
Best for: Training computer-use AI agents; Evaluating agent performance on desktop tasks; Running agents in isolated cloud environments
FAQ
- What are the best alternatives to OpenSandbox?
- The closest open-source alternatives to OpenSandbox are E2B, e2b and Daytona, followed by herdr, Orca and Steel. They are ranked by how closely they match what OpenSandbox does.
- Which OpenSandbox alternative is the most popular?
- Orca has the most GitHub stars among OpenSandbox alternatives, with 82,263 stars.
- Which OpenSandbox alternative is the most actively maintained?
- By recent activity, Orca (6,395 commits in the last 90 days) is the most actively developed alternative.