Zeroboot
sub-millisecond VM sandboxes using CoW memory forking
Details
- External ID
- 47412812
- Source
- HN
- Company
- —
- Product
- Zerobox
- Website domain
- github.com
- Launched
- March 17, 2026
- Cohort
- —
- Upvotes
- 20
- Upvotes percentile
- 0.7423124231242313
- Tags
- —
- Fetched at
- Sept. 7, 2026, 9:26 p.m.
- Updated at
- Sept. 7, 2026, 9:26 p.m.
Enrichment
- Theme
- systems tools and desktop utilities
- Vertical
- Horizontal
- Function
- Hardware & robotics
- Audience
- Developer
- AI stance
- Not AI
- Project type
- Commercial product
- Normalized one-liner
- sub-millisecond vm sandboxes using cow memory
- Manually corrected
- False
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 — 1668 launches clear the similarity bar, closest 8 shown.
Attention rank: #453 of 1669 (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 0.68
- Nønos · hn · 2025-12-23 · 9 upvotes · similarity 0.67
- Smol machines · hn · 2026-04-17 · 499 upvotes · similarity 0.65
- Blast · hn · 2026-08-28 · 11 upvotes · similarity 0.64
- Tiny VM sandbox in C with apps in Rust, C and Zig · hn · 2025-12-12 · 196 upvotes · similarity 0.63
- Z-Jail · hn · 2026-07-01 · 23 upvotes · similarity 0.62
- Copperhead · hn · 2026-09-08 · 249 upvotes · similarity 0.61
- MemStitch · hn · 2026-07-14 · 12 upvotes · similarity 0.60
Other launches for this product
Same idea, different domain
Nobody's really built a hardware & robotics tool for Fintech yet.