Crates / static_assertions / Alternatives
Rust crate alternatives · data Oct 24, 2026
Alternatives to static_assertions
Short answerThe closest alternatives to static_assertions on crates.io data are once_cell (3.8M real downloads a day), lazy_static (2.4M real downloads a day), proptest (663K real downloads a day). Of the 8 we list, the most used is once_cell, and 7 shipped a release in the last year. static_assertions itself gets 1,442,265 a day with 1,688 dependents.
Every alternative we found
| Alternative | Real downloads a day | vs static_assertions | Dependents | Last release | Why it is listed | |
|---|---|---|---|---|---|---|
| once_cell Widely used | 3,785,180 | 2.62x | 8,656 | 7mo | category Rust patterns, keyword "static" | side by side |
| lazy_static Foundational | 2,449,997 | 1.70x | 10,953 | 23d | category No standard library, category Rust patterns, keyword "static" | compare |
| proptest Foundational | 663,355 | 0.46x | 12,243 | 14d | category Testing, keyword "testing" | side by side |
| arbitrary Widely used | 574,083 | 0.40x | 1,030 | 18d | category Testing, keyword "testing" | side by side |
| rusty-fork Pulled in | 504,858 | 0.35x | 87 | 13mo | category Testing, keyword "testing" | compare |
| serial_test Widely used | 429,325 | 0.30x | 2,974 | 3mo | category Testing, keyword "testing" | side by side |
| mockall Widely used | 406,667 | 0.28x | 1,393 | 4mo | category Testing, keyword "testing" | compare |
| mockall_derive Pulled in | 406,392 | 0.28x | 2 | 4mo | category Testing, keyword "testing" | compare |
How to choose
- Same job, not the same API. Each line is listed because it shares a crates.io category or keyword with static_assertions; 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 static_assertions: 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 static_assertions, 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. 3,785,180 real downloads a day.once_cellRust crate. Single assignment cells and lazy values. Real use: 3.8M downloads a day on quiet days; 8,656 crates depend on it.Read it next →Also worth your time