Firecracker

What it does

Firecracker is a new virtualization technology and open source project for running multi-tenant container workloads

Firecracker is an open source virtualization technology that is purpose-built for creating and managing secure, multi-tenant container and function-based services. Build your own microVM infrastructure. Full control, Apache 2.0 licensed. Serverless compute primitive with VM-level isolation, near-instant launch and resume speeds, and state preservation. Firecracker is an open source virtualization technology purpose-built for creating and managing secure, multi-tenant container and function-based services. It enables you to deploy workloads in lightweight virtual machines (microVMs) that provide enhanced security and workload isolation over traditional VMs, while enabling the speed and…from firecracker-microvm.github.io

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  Firecracker Lab – Build a microVM from a container image2022 · github.com · ▲35

  Build a Firecracker microVM from a container image - alexellis/firecracker-init-lab

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  Bottlefire – Build single-executable microVMs from Docker images2025 · bottlefire.dev · ▲161
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  Webapp.io - Free firecracker-based full-stack hosting2023 · webapp.io · ▲120

  Webapp.io is a DevOps platform for developers of modern webapps.

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  Sub-millisecond VM sandboxes using CoW memory forkingMar 2026 · github.com · ▲311

  I wanted to see how fast an isolated code sandbox could start if I never had to boot a fresh VM. So instead of launching a new microVM per execution, I boot Firecracker once with Python and numpy already loaded, then snapshot the full VM state. Every execution after that creates a new KVM VM backed by a `MAP_PRIVATE` mapping of the snapshot memory, so Linux gives me copy-on-write pages automatically. That means each sandbox starts from an already-running Python process inside a real VM, runs the code, and exits. These are real KVM VMs, not containers: separate guest kernel, separate guest…

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  microvm – a minimalist machine type for QEMU inspired by Firecracker2019 · github.com · ▲145
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  Open Fire Serverless CI2023 · open-fire.dev · ▲24

  Hello, HN community, I'm really excited to show you Open Fire a serverless CI, how does it work? relying on serverless technologies (firecracker) we can spin up a new VM in less than 200 ms running in a more powerful and newest CPU on the market, just change 1 line of code on your GitHub Actions Workflow and you're up and running! You can see our use case, where we implemented Open Fire in the NextJS repo taking down build time from 1 hour 17 minutes to 26 minutes which is a 66 % of improvement without any engineering effort! [1] The value of a CI/CD Pipeline is inversely proportional…

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