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Zeroboot

sub-millisecond VM sandboxes using CoW memory forking

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HN · launched Mar 17, 2026 · 20 upvotes (top 26%) · 0 views

Niche: code execution sandboxes · 37 launches, 0 in the last 7 days · Explore this niche →

Category and tags
  • Horizontal
  • Dev tools
  • Developer
  • Not AI
  • Commercial product

Visit website ↗ Source listing ↗

More like this: all 37 launches in code execution sandboxes →

Could you build this?

No Sub-millisecond VM booting via copy-on-write memory forking requires low-level hypervisor programming, Linux kernel virtualization (KVM) internals, and memory management tricks.

What it would actually take: The architecture requires direct interaction with the Linux `/dev/kvm` API, userfaultfd/copy-on-write memory page cloning, and snapshot restoration of CPU registers and guest physical memory. It requires deep systems programming (in C, Rust, or Go) and kernel-level knowledge of memory pagetables and virtualization extensions (VT-x/AMD-V) to bypass Firecracker's full boot cycle.

Discussion

4 comments analyzed.

Competitors mentioned: CRIU

Feature requests: Multi-region support, Custom templates with user dependencies

Competitors

Other products that read as similar to this one : 4041 launches clear the similarity bar, closest 8 shown.

Attention rank: #1015 of 4042 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).

Launched 137 days after the earliest competitor.

  • Kudu · hn · 2026-08-26 · 5 upvotes · similarity 0.69
  • Nønos · hn · 2025-12-23 · 9 upvotes · similarity 0.68
  • Smol machines · hn · 2026-04-17 · 499 upvotes · similarity 0.67
  • solidcraft-perf · github · 2026-10-12 · 21 upvotes · similarity 0.66
  • Blast · hn · 2026-08-28 · 11 upvotes · similarity 0.65
  • xdos · github · 2026-11-07 · 38 upvotes · similarity 0.65
  • Tiny VM sandbox in C with apps in Rust, C and Zig · hn · 2025-12-12 · 196 upvotes · similarity 0.65
  • SatoriInsight · github · 2026-10-26 · 66 upvotes · similarity 0.64

Related data

The niche, labels, vibe code rating and competitor comparison on this page are analysis by Nicheloom. If you use them, please credit nicheloom.com. How you may use our data.