# Plan9 operating system

8 Hacker News commenters recommended Plan9 operating system and 0 criticized it, November 2025 to November 2026. It was recommended in 6 of 13 months.

**Verdict:** Free operating system from Bell Labs built around files, praised for a small, understandable design that people see as superior to Unix.

## Why people recommend it

- Everything is a file (2 comments): "you can support anything in the world and use it as a file (both locally and remotely)" ([source](https://news.ycombinator.com/item?id=48075830)) "Plan9 carries it out much better: Unix networking isn't file-based, Plan9's is." ([source](https://news.ycombinator.com/item?id=47645328))
- Superior design, validated over time (2 comments): "We once again discover that Plan9 and UNIX were right." ([source](https://news.ycombinator.com/item?id=47290930)) "Plan9 is different and it is superior in many ways." ([source](https://news.ycombinator.com/item?id=46081391))

## Alternatives hackers recommend

- [Windows](https://hackerapproved.com/p/windows.md): 1287 recommend
- [macOS](https://hackerapproved.com/p/macos.md): 1041 recommend
- [Linux](https://hackerapproved.com/p/linux.md): 745 recommend
- [Haiku](https://hackerapproved.com/p/haiku-os.md): 115 recommend
- [NetBSD](https://hackerapproved.com/p/netbsd.md): 100 recommend

## Cite as

Hacker Approved, "Plan9 operating system", https://hackerapproved.com/p/plan9/ (counts from 1,795,640 Hacker News comments, November 2025 to November 2026).