Rust crate alternatives · data Oct 24, 2026
Alternatives to psm
Short answerThe closest alternatives to psm on crates.io data are smallvec (3.9M 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. psm itself gets 372,856 a day with 15 dependents.
Every alternative we found
| Alternative | Real downloads a day | vs psm | Dependents | Last release | Why it is listed | |
|---|---|---|---|---|---|---|
| smallvec Widely used | 3,868,589 | 10.38x | 4,345 | 1d | keyword "no_std", keyword "stack" | compare |
| arrayvec Widely used | 1,733,744 | 4.65x | 1,215 | 4mo | keyword "no_std", keyword "stack" | compare |
| hashbrown Widely used | 8,927,960 | 23.94x | 2,468 | 6mo | keyword "no_std" | compare |
| indexmap Widely used | 4,883,122 | 13.10x | 6,422 | 49d | keyword "no_std" | compare |
| base64 Foundational | 4,638,981 | 12.44x | 19,537 | 3mo | keyword "no_std" | compare |
| serde Foundational | 4,327,945 | 11.61x | 133,588 | 3mo | keyword "no_std" | compare |
| serde_derive Widely used | 4,161,400 | 11.16x | 6,497 | 3mo | keyword "no_std" | compare |
| serde_core Established | 3,794,333 | 10.18x | 229 | 3mo | 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 psm; 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 psm: 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 psm, 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. 3,868,589 real downloads a day.smallvecRust crate. 'Small vector' optimization: store up to a small number of items on the stack. Real use: 3.9M downloads a day on quiet days; 4,345 crates depend on it.Read it next →Also worth your time