AWS Firecracker is described as 'Firecracker is an open source virtualization technology that is purpose-built for creating and managing secure, multi-tenant container and function-based services that provide serverless operational models' and is a Virtualization tool in the network & admin category. There are three alternatives to AWS Firecracker for Linux, BSD, Self-Hosted, Mac and Windows. The best AWS Firecracker alternative is QEMU, which is both free and Open Source. Other great apps like AWS Firecracker are Cassowary and Kata Containers.