Crates / slotmap / Alternatives
Rust crate alternatives · data Oct 24, 2026
Alternatives to slotmap
Short answerThe closest alternatives to slotmap on crates.io data are bumpalo (2M real downloads a day), slab (3M real downloads a day), sharded-slab (1.7M real downloads a day). Of the 8 we list, the most used is slab, and 7 shipped a release in the last year. slotmap itself gets 345,609 a day with 545 dependents.
Every alternative we found
| Alternative | Real downloads a day | vs slotmap | Dependents | Last release | Why it is listed | |
|---|---|---|---|---|---|---|
| bumpalo Established | 1,968,716 | 5.70x | 546 | 5mo | category Memory management, keyword "allocator", keyword "arena" | side by side |
| slab Established | 3,013,568 | 8.72x | 619 | 9mo | category Data structures, category Memory management, keyword "allocator" | compare |
| sharded-slab Pulled in | 1,733,301 | 5.02x | 32 | 3.1y | category Data structures, category Memory management, keyword "allocator" | compare |
| yoke Established | 2,599,767 | 7.52x | 104 | 2d | category Caching, category Data structures | compare |
| zerovec-derive Pulled in | 2,561,390 | 7.41x | 6 | 2d | category Caching, category Data structures | compare |
| zerovec Pulled in | 2,516,803 | 7.28x | 60 | 2d | category Caching, category Data structures | compare |
| yoke-derive Pulled in | 2,432,865 | 7.04x | 14 | 24d | category Caching, category Data structures | compare |
| zerofrom-derive Pulled in | 2,353,727 | 6.81x | 3 | 39d | category Caching, category Data structures | compare |
How to choose
- Same job, not the same API. Each line is listed because it shares a crates.io category or keyword with slotmap; 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 slotmap: 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 slotmap, 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. 1,968,716 real downloads a day.bumpaloRust crate. A fast bump allocation arena for Rust. Real use: 2M downloads a day on quiet days; 546 crates depend on it.Read it next →Also worth your time