Fwiw, you can run this instead free and open source: https://github.com/smol-machines/smolvm
Disclaimer: Am author.
Functionality of criu built in so you can get rewind, pause, in an accessible manner.
Embeddable (you can write JavaScript to programmatically use an isolated environment)
Native performance on multiplatform + consistent experience across platforms.
EDIT: Ah, looks like it means "runs its own kernel", not "isolates at the kernel" like Docker does.
containers are built on linux primitives & so shares the kernel.
any point of comparison with microsandbox? [0]
Good sandboxing is a feature of a good VM.
Outside of that I support GPU and enables something called branchable computing.
Firecracker has a long track record but has a lot of knobs and tunings to get the security right.
smolvm's serve mode confines each VMM by default with a seccomp allowlist, Landlock, a per-VM uid and no_new_privs, much like Firecracker's jailer.
For dangerous workloads, people can do the same things such as skip host mounts and use virtio-net.
It's not a different security class just because it's libkrun vs firecracker
Also: it has to be free.
So yes you're right, people confuse VC backed companies, and vibe-coded pet-projects for sustainable software.
SlicerVM was started in 2022 and internal only, plenty of YouTube videos and such about it - written completely manually from our Actuated work.
There's a free trial for anyone who wants to play about on their Mac or Linux computer, the comment here is from a real user (unprompted) that knew and used free alternatives previously.