Vpod
Tiny Linux sandbox running in WASM
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Hi HN,I spent the last few months reading the RISC‑V specification to build the lightest possible sandboxes. The idea behind a vpod is to quickly spin up a Linux sandbox from snapshots (Alpine by default) without any setup or subsystem required.The trade-off for portability and security is raw CPU speed. So we don't expect it to match native workloads with Python or pip, for example.More info is in the README https://github.com/capsulerun/vpodHappy to answer any questions!
HN · launched Jun 17, 2026 · 12 upvotes (top 35%) · 0 views
Niche: code execution sandboxes · 37 launches, 1 in the last 7 days · Explore this niche →
Category and tags
- Horizontal
- Dev tools
- Developer
- Not AI
- Hobby / open-source project
Visit website ↗ Source listing ↗
More like this: all 37 launches in code execution sandboxes →
Could you build this?
No Writing a RISC-V CPU emulator and hardware virtualization layer from scratch to boot Alpine Linux inside WebAssembly requires deep low-level systems and computer architecture expertise.
What it would actually take: The project requires implementing a RISC-V (RV64GC) emulator in C, Rust, or Zig that adheres strictly to the RISC-V privileged architecture specification, including MMU, page tables, and CSRs. This emulator must compile to WebAssembly and provide virtualized block devices, memory snapshots, and serial terminals to boot an Alpine Linux kernel. Executing this requires specialized knowledge of CPU architectures, Linux kernel booting sequences, and low-level WebAssembly memory management.
Discussion
5 comments analyzed.
Competitors mentioned: jslinux, Emscripten
Concerns raised: No browser support yet (WASI-based, not Emscripten), Networking doesn't work, RISC-V emulation layer adds complexity vs direct WASM compilation
Feature requests: Browser demo on GitHub page, Networking support extension
Competitors
Other products that read as similar to this one : 334 launches clear the similarity bar, closest 8 shown.
Attention rank: #123 of 335 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 224 days after the earliest competitor.
- machine0 · hn · 2026-06-15 · 96 upvotes · similarity 0.52
- Sub-millisecond VM sandboxes using CoW memory forking · hn · 2026-03-17 · 311 upvotes · similarity 0.51
- Tiny VM sandbox in C with apps in Rust, C and Zig · hn · 2025-12-12 · 196 upvotes · similarity 0.48
- Microterm runs Linux VM in any browser tab via WASM, RISCV64 emulation · hn · 2026-02-22 · 6 upvotes · similarity 0.47
- Our space game has a built-in RISC-V emulator that runs Linux · hn · 2026-10-02 · 94 upvotes · similarity 0.47
- Container · ph · 2026-10-30 · 2 upvotes · similarity 0.47
- ProHoster · ph · 2026-11-03 · 1 upvotes · similarity 0.47
- We built a <60ms, open-source alternative to E2B using RustVMM and KVM · hn · 2026-04-22 · 7 upvotes · similarity 0.47
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