Crates / adler32 / Alternatives
Rust crate alternatives · data Oct 24, 2026
Alternatives to adler32
Short answerThe closest alternatives to adler32 on crates.io data are adler2 (2M real downloads a day), adler (187K real downloads a day), hashbrown (8.9M real downloads a day). Of the 8 we list, the most used is hashbrown, and 5 shipped a release in the last year. adler32 itself gets 150,971 a day with 47 dependents.
Every alternative we found
| Alternative | Real downloads a day | vs adler32 | Dependents | Last release | Why it is listed | |
|---|---|---|---|---|---|---|
| adler2 Pulled in | 1,994,630 | 13.21x | 18 | 17mo | keyword "adler32", keyword "hash" | compare |
| adler Pulled in | 186,534 | 1.24x | 17 | 5.7y | keyword "adler32", keyword "hash" | compare |
| hashbrown Widely used | 8,927,960 | 59.14x | 2,468 | 6mo | keyword "hash" | compare |
| digest Widely used | 3,862,411 | 25.58x | 1,197 | 6mo | keyword "hash" | compare |
| sha2 Foundational | 3,510,276 | 23.25x | 22,608 | 12d | keyword "hash" | compare |
| foldhash Established | 3,043,165 | 20.16x | 333 | 14mo | keyword "hash" | compare |
| rustc-hash Widely used | 2,998,135 | 19.86x | 3,505 | 4mo | keyword "hash" | compare |
| crc32fast Widely used | 2,229,287 | 14.77x | 1,440 | 4d | keyword "hash" | compare |
How to choose
- Same job, not the same API. Each line is listed because it shares a crates.io category or keyword with adler32; 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 adler32: 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 adler32, 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 steady. 1,994,630 real downloads a day.adler2Rust crate. A simple clean-room implementation of the Adler-32 checksum. Real use: 2M downloads a day on quiet days; 18 crates depend on it.Read it next →Also worth your time