Kata containers are QEMU based, so they use similar KVM virtualization as firecracker. QEMU is larger in scope than Firecracker, though, so you can (among other things) expose GPUs and other devices to the QEMU based containers.

We picked Firecracker because the smaller scope makes it easier to understand and, thus, trust for our particular workloads.

This is new and may not be used much, but it is possible to use part of Kata with part of Firecracker. https://github.com/kata-containers/documentation/wiki/Initia...

Thanks.