About
CodeSandbox is a cloud-based development platform that provides instantly provisioned, fully isolated sandbox environments powered by microVM infrastructure. Originally known for in-browser coding playgrounds, CodeSandbox has evolved into an enterprise-grade SDK that enables developers and AI builders to programmatically create, clone, fork, and decommission sandboxes in seconds. With the CodeSandbox SDK — launched in partnership with Together AI — teams can give AI agents a secure environment to run and evaluate code without risk to host systems. Sandboxes spin up in under 2 seconds, support snapshot-based resumption after hibernation, and scale to millions of concurrent VMs. This makes it ideal for AI agent pipelines, code evaluation (evals), CI/CD testing, and multi-tenant development environments. Key capabilities include Sandpack (embed live coding environments in any browser app), Storybook integration for interactive component playgrounds, and a VS Code extension for familiar editing. CodeSandbox supports any tech stack via its template library and offers powerful APIs for environment lifecycle management. It's built for developers creating AI-powered products, platforms running code interpretation at scale, EdTech companies provisioning per-student environments, and teams needing isolated CI/CD runners. With millions of users and billions of lines of code written, CodeSandbox is a proven foundation for the next generation of AI-native development tools.
Key Features
- CodeSandbox SDK: Programmatically create, clone, fork, and manage isolated microVM sandboxes via API — ideal for AI agent pipelines and scalable code execution.
- Sub-2-Second Sandbox Spin-Up: MicroVM infrastructure boots entire environments and restores snapshots in under 2 seconds, enabling rapid iteration and low-latency agent workflows.
- Secure Isolated Execution: Every sandbox runs in full isolation, allowing untrusted or AI-generated code to execute safely without risk to host systems.
- Sandpack — Embedded Live Coding: Drop a fully interactive in-browser coding environment into any web app or documentation site with the Sandpack component library.
- Customizable Hibernation & Snapshots: Control inactivity windows before auto-hibernation, and resume sandboxes with full state preservation — no lost context, no cold-start delays.
Use Cases
- Running AI agents in isolated sandboxes so they can safely execute, test, and iterate on code without affecting host systems.
- Providing per-student or per-developer cloud environments for EdTech platforms and coding bootcamps at scale.
- Performing secure code interpretation and AI evals by running generated code in fully isolated microVMs.
- Embedding interactive live coding playgrounds in developer documentation, tutorials, or component libraries using Sandpack.
- Running CI/CD test suites inside ephemeral sandboxes that hibernate after tests complete and resume on demand.
Pros
- Blazing-fast environment provisioning: Sandboxes spin up in under 2 seconds with snapshot support, making them practical for real-time AI agent and CI/CD use cases.
- Scales to millions of concurrent VMs: Built for platform-scale workloads — perfect for SaaS products, EdTech platforms, and AI evaluation pipelines with high concurrency demands.
- Versatile use cases: Supports AI agents, secure evals, CI/CD test runners, developer environments, and embedded coding playgrounds from one unified platform.
Cons
- Advanced SDK features require paid plans: Full API access, high concurrency, and enterprise-grade VM management are gated behind paid tiers, limiting free-plan scalability.
- Primarily developer-focused: The platform assumes familiarity with APIs and infrastructure concepts, making it less accessible for non-technical users or no-code builders.
Frequently Asked Questions
What is the CodeSandbox SDK?
The CodeSandbox SDK is an API that lets you programmatically spin up, clone, fork, and manage isolated cloud sandboxes. It's designed for AI agents, code interpretation, and scalable development environments.
How fast do sandboxes start?
CodeSandbox's microVM infrastructure can spin up entire VMs, clone them, and restore snapshots in under 2 seconds, enabling near-instant code execution.
Is it safe to run untrusted or AI-generated code?
Yes. Each sandbox runs in full isolation from your host system, so untrusted or AI-generated code cannot affect your infrastructure.
What is Sandpack?
Sandpack is a component library that lets you embed a fully interactive, live coding environment directly in the browser — useful for documentation sites, tutorials, and code playgrounds.
Is CodeSandbox free to use?
CodeSandbox offers a free tier to get started. Advanced features like high-concurrency VM management, SDK access at scale, and enterprise controls require a paid plan.
