# Velxio

21 Hacker News commenters recommended Velxio and 3 criticized it, November 2025 to November 2026. It was recommended in 3 of 13 months.

**Verdict:** Browser-based emulator for Arduino, ESP32 and Raspberry Pi boards that runs with no setup, so projects can be tested without physical hardware. Critics say it takes away learning.

## Why people recommend it

- Test projects without physical hardware (3 comments): "This is a great idea. It’s always been inconvenient requiring access to the physical board just to be able to test these sort of projects." ([source](https://news.ycombinator.com/item?id=47549443)) "Being able to iterate without constantly flashing hardware can save a lot of time early on." ([source](https://news.ycombinator.com/item?id=47551651)) "this would save a lot of soldering time" ([source](https://news.ycombinator.com/item?id=47551522))
- No setup or toolchains required (2 comments): "no setup is required on the user's side, no toolchains need to be installed" ([source](https://news.ycombinator.com/item?id=47548755)) "It runs immediately, no setup required" ([source](https://news.ycombinator.com/item?id=47551715))
- Runs locally with no cloud (2 comments): "trying to push further into full multi-board emulation and local-first workflows" ([source](https://news.ycombinator.com/item?id=47551659)) "No cloud dependency. No student accounts. No data leaving your network." ([source](https://news.ycombinator.com/item?id=47548356))
- Multiple boards with full peripherals (2 comments): "Velxio supports multiple heterogeneous boards in the same circuit" ([source](https://news.ycombinator.com/item?id=47550822)) "peripherals are fully emulated, not just the CPU" ([source](https://news.ycombinator.com/item?id=47555699))

## Alternatives hackers recommend

- [Esp32sim](https://hackerapproved.com/p/esp32sim.md): 11 recommend
- [Wokwi](https://hackerapproved.com/p/wokwi.md): 6 recommend
- [Simantic](https://hackerapproved.com/p/simantic.md): 5 recommend

## Cite as

Hacker Approved, "Velxio", https://hackerapproved.com/p/velxio-2-0/ (counts from 1,795,640 Hacker News comments, November 2025 to November 2026).