# OpenZL

6 Hacker News commenters recommended OpenZL and 1 criticized it, November 2025 to November 2026. It was recommended in 3 of 13 months.

**Verdict:** Gives high compression ratios at high speed for data whose structure you know. Main caveat: it requires knowing that structure and works only inside your own program.

## Why people recommend it

- High compression ratios at high speed (1 comments): "OpenZL delivers high compression ratios while preserving high speed, a level of performance that is out of reach for generic compressors." ([source](https://news.ycombinator.com/item?id=48696273))
- Considerably better than alternatives (1 comments): "It really is considerably better, but I wonder how many people will do it" ([source](https://news.ycombinator.com/item?id=47384376))
- Seen as cooler than alternatives (1 comments): "Honestly, Openzl looks even cooler!" ([source](https://news.ycombinator.com/item?id=47215320))

## What people warn about

- Requires knowing data structure (1 comments): "it requires that you know the structure of your data, and don't care about inspecting that data outside of your program" ([source](https://news.ycombinator.com/item?id=48696536))
- Doubts about how many will adopt (1 comments): "It really is considerably better, but I wonder how many people will do it" ([source](https://news.ycombinator.com/item?id=47384376))

## Alternatives hackers recommend

- [Zstandard (zstd)](https://hackerapproved.com/p/zstd.md): 111 recommend
- [Brotli](https://hackerapproved.com/p/brotli.md): 24 recommend
- [gzip](https://hackerapproved.com/p/gzip.md): 23 recommend
- [tar](https://hackerapproved.com/p/tar.md): 19 recommend
- [NNCP](https://hackerapproved.com/p/nncp.md): 15 recommend

## Cite as

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