Crates / fixedbitset / Alternatives
Rust crate alternatives · data Oct 24, 2026
Alternatives to fixedbitset
Short answerThe closest alternatives to fixedbitset on crates.io data are either (3M real downloads a day), arrayvec (1.7M real downloads a day), hashbrown (8.9M real downloads a day). Of the 8 we list, the most used is hashbrown, and 8 shipped a release in the last year. fixedbitset itself gets 1,507,079 a day with 199 dependents.
Every alternative we found
| Alternative | Real downloads a day | vs fixedbitset | Dependents | Last release | Why it is listed | |
|---|---|---|---|---|---|---|
| either Widely used | 3,049,603 | 2.02x | 1,488 | 18d | category Data structures, keyword "data-structure", keyword "no_std" | compare |
| arrayvec Widely used | 1,733,744 | 1.15x | 1,215 | 4mo | category Data structures, keyword "data-structure", keyword "no_std" | compare |
| hashbrown Widely used | 8,927,960 | 5.92x | 2,468 | 6mo | category Data structures, keyword "no_std" | compare |
| indexmap Widely used | 4,883,122 | 3.24x | 6,422 | 49d | category Data structures, keyword "no_std" | compare |
| smallvec Widely used | 3,868,589 | 2.57x | 4,345 | 1d | category Data structures, keyword "no_std" | compare |
| slab Established | 3,013,568 | 2.00x | 619 | 9mo | category Data structures, keyword "no_std" | compare |
| equivalent Pulled in | 2,919,252 | 1.94x | 44 | 11d | category Data structures, keyword "no_std" | compare |
| tinyvec Established | 2,308,962 | 1.53x | 270 | 41d | category Data structures, keyword "no_std" | compare |
How to choose
- Same job, not the same API. Each line is listed because it shares a crates.io category or keyword with fixedbitset; 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 fixedbitset: 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 fixedbitset, 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. 3,049,603 real downloads a day.eitherRust crate. The enum `Either` with variants `Left` and `Right` is a general purpose sum type with two cases. Real use: 3M downloads a day on quiet days; 1,488 crates...Read it next →Also worth your time