Kiri launches open-source Rust Docker alternative

Docker Desktop's resource footprint has long frustrated developers, and while proprietary alternatives proved local containers could be faster, Kiri makes a compelling open-source case by stripping the runtime down to bare metal in Rust. By ditching dockerd, containerd, and runc in favor of direct clone3 execution and a minimal guest PID 1 agent, it delivers near-instant container startup without breaking existing CLI or Compose setups.

• –Rust-powered minimal stack: Replaces dockerd, containerd, and runc with a 15 MB host daemon and a 900 KB guest agent that spawns containers via clone3 directly into Linux namespaces.
• –Dramatic startup gains: Container lifecycle runs in ~2.5 ms via the Docker Engine API and ~14 ms via the CLI, roughly 8x to 80x faster than Docker Desktop and OrbStack.
• –Resource-aware auto-sleep: The underlying Linux VM automatically suspends after 60 seconds of inactivity and wakes in ~0.15 seconds, eliminating idle battery drain.
• –Built-in developer ergonomics: Ships with local .kiri.local domains, automated HTTPS certificates, public tunneling via kiri share, and one-command Kubernetes cluster provisioning.
• –Seamless drop-in migration: Implements the standard Docker Engine API and provides a migration command to pull existing containers, images, and volumes directly from Docker Desktop or OrbStack.