firecracker-microvm/firecracker

Health v2 · maintenance only

Adoption not part of the score

36300 stars · 2583 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Firecracker is an open-source virtual machine monitor (VMM) that uses Linux KVM to create and manage lightweight microVMs for secure multi-tenant workloads. Developed at AWS to power Lambda and Fargate, it combines VM-level isolation with container-like speed and density.

Use cases

• run serverless functions in isolated microVMs
• sandbox untrusted code with VM-level isolation
• build a multi-tenant container runtime like Kata Containers
• launch thousands of lightweight VMs per host for high density
• securely isolate FaaS workloads on bare metal
• spin up fast-booting VMs for CI or ephemeral compute

When to choose

• you need strong hardware-virtualization isolation with sub-125ms boot times
• you run multi-tenant or untrusted workloads and need a minimal attack surface
• you want container-like density with VM-grade security on Linux/KVM hosts
• you are building your own serverless or FaaS platform

When to avoid

• you need full-featured VMs with many emulated devices or GPU passthrough
• your host does not run Linux with KVM support
• you just need simple process-level sandboxing without VM isolation
• you need a managed solution and cannot operate infrastructure

Facets

application · maturity stable

container-runtime security serverless cloud-computing security self-hosted rust cli self-hosted microvm vmm kvm virtualization serverless sandboxing aws-lambda multi-tenant sandbox devops containers linux

Member repositories

For agents

markdown · JSON · MCP: product_card(name="firecracker-microvm/firecracker")