forkd alternatives
Curated alternatives to forkd — and why you'd switch.
CubeSandbox
Hardware-isolated microVM sandboxes for AI agents — sub-60ms boot, <5MB overhead, E2B-compatible API, self-hosted on your own KVM nodes.
Why switchBoth are self-hosted Firecracker-class microVM sandboxes for agents. CubeSandbox sells a platform (E2B-compatible API, sub-60ms cold boots); forkd sells a primitive — copy-on-write fork from a warm parent, which wins precisely when 100 children share one expensive warm state.
Full comparison →arcbox
Open-source container and VM runtime for macOS in pure Rust: drop-in Docker engine, sub-100ms agent sandboxes (`abctl claude`), full Linux VMs and throwaway macOS guests on one daemon.
Why switchBoth are sandbox primitives for agents rather than services. forkd forks warm Firecracker VMs on Linux/KVM; ArcBox boots microVMs on Apple's hypervisor with a Docker-compatible engine beside them.
Full comparison →