Rust crate alternatives · data Oct 24, 2026
Alternatives to errno
Short answerThe closest alternatives to errno on crates.io data are getrandom (7.6M real downloads a day), zeroize (2.4M real downloads a day), r-efi (2.1M real downloads a day). Of the 8 we list, the most used is getrandom, and 7 shipped a release in the last year. errno itself gets 2,791,762 a day with 259 dependents.
Every alternative we found
| Alternative | Real downloads a day | vs errno | Dependents | Last release | Why it is listed | |
|---|---|---|---|---|---|---|
| getrandom Widely used | 7,623,482 | 2.73x | 5,558 | 4mo | category No standard library, category Operating systems | compare |
| zeroize Widely used | 2,397,082 | 0.86x | 5,204 | 18d | category No standard library, category Operating systems | compare |
| r-efi Pulled in | 2,051,196 | 0.73x | 14 | 2mo | category No standard library, category Operating systems | compare |
| iana-time-zone Established | 2,009,518 | 0.72x | 109 | 9mo | category Operating systems | compare |
| hermit-abi Pulled in | 1,146,485 | 0.41x | 10 | 54d | category Operating systems | compare |
| zeroize_derive Pulled in | 979,424 | 0.35x | 26 | 4mo | category No standard library, category Operating systems | compare |
| iana-time-zone-haiku Pulled in | 927,965 | 0.33x | 1 | 3.5y | category Operating systems | compare |
| camino Widely used | 872,911 | 0.31x | 1,078 | 39d | category Operating systems | compare |
How to choose
- Same job, not the same API. Each line is listed because it shares a crates.io category or keyword with errno; read its description before you swap.
- More dependents means more answered questions and a smaller chance it disappears.
- Check the last release against how fast you need fixes. For errno: is it still maintained?
Rules
Alternatives = tracked crates (top 1000 by downloads) that share a specific crates.io category (2 points each) or keyword (3 points each) with errno, most similar first; its own parts (same name prefix) and crates it depends on or that depend on it are left out, because those are companions, not substitutes. Real downloads = quiet-day median, crates.io data Oct 24, 2026. Built when we find 3 or more.
Up next
The closest alternative: Widely used and steady. 7,623,482 real downloads a day.getrandomRust crate. A small cross-platform library for retrieving random data from system source. Real use: 7.6M downloads a day on quiet days; 5,558 crates depend on it.Read it next →Also worth your time