Crates / outref / Alternatives
Rust crate alternatives · data Oct 24, 2026
Alternatives to outref
Short answerThe closest alternatives to outref on crates.io data are slotmap (346K real downloads a day), aligned-vec (333K real downloads a day), nibble_vec (235K real downloads a day). Of the 8 we list, the most used is thiserror, and 6 shipped a release in the last year. outref itself gets 728,006 a day with 4 dependents.
Every alternative we found
| Alternative | Real downloads a day | vs outref | Dependents | Last release | Why it is listed | |
|---|---|---|---|---|---|---|
| slotmap Established | 345,609 | 0.47x | 545 | 11mo | keyword "reference" | compare |
| aligned-vec Established | 332,520 | 0.46x | 101 | 19mo | keyword "slice" | compare |
| nibble_vec Pulled in | 234,547 | 0.32x | 3 | 6.3y | keyword "slice" | compare |
| thiserror Foundational | 5,048,791 | 6.94x | 75,923 | 31d | category No standard library, category Rust patterns | compare |
| itertools Widely used | 4,545,996 | 6.24x | 8,656 | 4mo | category No standard library, category Rust patterns | compare |
| once_cell Widely used | 3,785,180 | 5.20x | 8,656 | 7mo | category Rust patterns | compare |
| pin-project-lite Widely used | 3,270,978 | 4.49x | 1,708 | 8mo | category No standard library, category Rust patterns | compare |
| zerocopy Established | 3,245,504 | 4.46x | 878 | 11d | category Rust patterns | compare |
How to choose
- Same job, not the same API. Each line is listed because it shares a crates.io category or keyword with outref; 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 outref: 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 outref, 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: Established and steady. 345,609 real downloads a day.slotmapRust crate. Slotmap data structure. Real use: 346K downloads a day on quiet days; 545 crates depend on it.Read it next →Also worth your time