# KolibriOS

6 Hacker News commenters recommended KolibriOS and 1 criticized it, November 2025 to November 2026. It was recommended in 4 of 13 months.

**Verdict:** Free, small operating system people call mature, with commented code worth reading. One critic questions whether it is still active.

## Why people recommend it

- Mature for its size (2 comments): "The 12 MB OS looks surprisingly mature." ([source](https://news.ycombinator.com/item?id=47557912)) "it's a quite mature assembly repo" ([source](https://news.ycombinator.com/item?id=49934547))
- Shows what assembly can do (2 comments): "Having seen with my own eyes what you can do with assembly per KolibriOS" ([source](https://news.ycombinator.com/item?id=50180602)) "it's a quite mature assembly repo" ([source](https://news.ycombinator.com/item?id=49934547))

## Alternatives hackers recommend

- [webOS](https://hackerapproved.com/p/webos.md): 20 recommend
- [AsteroidOS](https://hackerapproved.com/p/asteroidos-2-0.md): 19 recommend
- [Minix](https://hackerapproved.com/p/minix.md): 15 recommend
- [Inferno operating system](https://hackerapproved.com/p/inferno.md): 12 recommend
- [Visopsys](https://hackerapproved.com/p/visopsys.md): 9 recommend

## Cite as

Hacker Approved, "KolibriOS", https://hackerapproved.com/p/kolibrios/ (counts from 1,795,640 Hacker News comments, November 2025 to November 2026).