Crates / alloc-stdlib / Alternatives
Rust crate alternatives · data Oct 24, 2026
Alternatives to alloc-stdlib
Short answerThe closest alternatives to alloc-stdlib on crates.io data are rustix (3.4M real downloads a day), slab (3M real downloads a day), bumpalo (2M real downloads a day). Of the 8 we list, the most used is rustix, and 7 shipped a release in the last year. alloc-stdlib itself gets 781,374 a day with 11 dependents.
Every alternative we found
| Alternative | Real downloads a day | vs alloc-stdlib | Dependents | Last release | Why it is listed | |
|---|---|---|---|---|---|---|
| rustix Widely used | 3,390,892 | 4.34x | 1,684 | 38d | keyword "safe" | compare |
| slab Established | 3,013,568 | 3.86x | 619 | 9mo | keyword "allocator" | compare |
| bumpalo Established | 1,968,716 | 2.52x | 546 | 5mo | keyword "allocator" | compare |
| sharded-slab Pulled in | 1,733,301 | 2.22x | 32 | 3.1y | keyword "allocator" | compare |
| num_enum Widely used | 760,679 | 0.97x | 1,159 | 7mo | keyword "safe" | compare |
| slotmap Established | 345,609 | 0.44x | 545 | 11mo | keyword "allocator" | compare |
| tikv-jemalloc-sys Pulled in | 305,944 | 0.39x | 44 | 5mo | keyword "allocator" | compare |
| tikv-jemallocator Established | 295,126 | 0.38x | 435 | 5mo | keyword "allocator" | compare |
How to choose
- Same job, not the same API. Each line is listed because it shares a crates.io category or keyword with alloc-stdlib; 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 alloc-stdlib: 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 alloc-stdlib, 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. 3,390,892 real downloads a day.rustixRust crate. Safe Rust bindings to POSIX/Unix/Linux/Winsock-like syscalls. Real use: 3.4M downloads a day on quiet days; 1,684 crates depend on it.Read it next →Also worth your time