Firecracker
About Firecracker
Firecracker is an open source virtualization technology for creating and managing secure, multi-tenant container and function-based services. It enables deployment of workloads in lightweight virtual machines called microVMs. Firecracker runs in user space and uses the Linux Kernel-based Virtual Machine (KVM) to create microVMs. The process can be controlled via a RESTful API for actions such as configuring vCPUs or starting the machine. It provides built-in rate limiters to control network and storage resources used by microVMs. Each microVM is further isolated by a companion program called "jailer".
Used for
- Deploying workloads in lightweight virtual machines that provide isolation and container-like resource efficiency.
- Configuring the number of vCPUs or starting the machine via the API.
- Controlling network and storage resources used by thousands of microVMs on the same machine.
- Sharing configuration information between host and guest operating system via the metadata service.
- Running serverless functions and containers.
Who it is for
- Teams that want to build their own microVM infrastructure.
- Teams that want Firecracker capabilities without managing infrastructure.
- Purpose-built for AI agents, developer platforms, and multi-tenant workloads.
From Firecracker's own website, read 2026-10-23. How we build listings.
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Quick Facts
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