# Firecracker microVM

> Open-source virtualization technology from AWS that powers secure sandboxes for AI agents with hardware-level isolation. Used by E2B and other sandbox platforms.

- **URL:** https://firecracker-microvm.github.io/
- **Category:** LLM Tools
- **Tags:** Virtualization, security, Microvm
- **Updated:** 2026-03-24 13:36
- **Canonical page:** https://vectordb.ever.works/items/firecracker-microvm

## Details

## Overview

Firecracker is an open-source virtualization technology from AWS that creates lightweight microVMs for secure, multi-tenant container and function-based services.

## Use in AI Agent Sandboxes

E2B and other AI agent sandbox platforms use Firecracker to provide secure isolation for running untrusted AI-generated code. Each sandbox is powered by Firecracker, a microVM made to run untrusted workflows.

## Key Features

- **Lightweight**: MicroVMs boot in under 125 milliseconds
- **Secure**: Hardware-level isolation between workloads
- **Efficient**: Minimal memory and CPU overhead
- **Scale**: Supports thousands of microVMs per host

## Technical Architecture

Firecracker provides KVM-based virtualization with a minimalist device model, optimized for serverless and container workloads. It's written in Rust for memory safety and uses a minimal attack surface.

## Industry Adoption

Firecracker powers AWS Lambda and AWS Fargate, processing trillions of requests per month. In 2026, it's also widely adopted by AI agent platforms requiring secure code execution.

## Pricing

Open-source under Apache 2.0 license.

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