Crates / simdutf8 / Alternatives
Rust crate alternatives · data Oct 24, 2026
Alternatives to simdutf8
Short answerThe closest alternatives to simdutf8 on crates.io data are utf8_iter (2.1M real downloads a day), encode_unicode (549K real downloads a day), heck (3.9M real downloads a day). Of the 8 we list, the most used is heck, and 4 shipped a release in the last year. simdutf8 itself gets 965,252 a day with 220 dependents.
Every alternative we found
| Alternative | Real downloads a day | vs simdutf8 | Dependents | Last release | Why it is listed | |
|---|---|---|---|---|---|---|
| utf8_iter Pulled in | 2,136,300 | 2.21x | 12 | 2.9y | category Encoding, keyword "unicode", keyword "utf-8" | compare |
| encode_unicode Pulled in | 548,844 | 0.57x | 19 | 4.2y | category Encoding, category No standard library, keyword "unicode", keyword "utf-8" | compare |
| heck Widely used | 3,901,922 | 4.04x | 1,865 | 2.6y | category No standard library, keyword "string", keyword "unicode" | compare |
| crc32fast Widely used | 2,229,287 | 2.31x | 1,440 | 4d | category Algorithms, category No standard library, keyword "simd" | compare |
| simd-adler32 Pulled in | 1,931,920 | 2.00x | 26 | 3mo | category Algorithms, category No standard library, keyword "simd" | compare |
| bstr Established | 1,252,630 | 1.30x | 676 | 2mo | category Encoding, keyword "string" | compare |
| unicode-bidi Established | 1,058,529 | 1.10x | 190 | 22mo | category Encoding, category No standard library, keyword "unicode" | compare |
| compact_str Established | 712,106 | 0.74x | 575 | 3mo | category Encoding, keyword "string" | compare |
How to choose
- Same job, not the same API. Each line is listed because it shares a crates.io category or keyword with simdutf8; 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 simdutf8: 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 simdutf8, 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: Few direct dependents and quiet for years. 2,136,300 real downloads a day.utf8_iterRust crate. Iterator by char over potentially-invalid UTF-8 in &[u8]. Real use: 2.1M downloads a day on quiet days; 12 crates depend on it.Read it next →Also worth your time