Crates / proptest / Alternatives
Rust crate alternatives · data Oct 24, 2026
Alternatives to proptest
Short answerThe closest alternatives to proptest on crates.io data are static_assertions (1.4M real downloads a day), arbitrary (574K real downloads a day), serial_test (429K real downloads a day). Of the 8 we list, the most used is static_assertions, and 6 shipped a release in the last year. proptest itself gets 663,355 a day with 12,243 dependents.
Every alternative we found
| Alternative | Real downloads a day | vs proptest | Dependents | Last release | Why it is listed | |
|---|---|---|---|---|---|---|
| static_assertions Widely used | 1,442,265 | 2.17x | 1,688 | 7.0y | category Testing, keyword "testing" | side by side |
| arbitrary Widely used | 574,083 | 0.87x | 1,030 | 18d | category Testing, keyword "testing" | compare |
| serial_test Widely used | 429,325 | 0.65x | 2,974 | 3mo | category Testing, keyword "testing" | compare |
| mockall Widely used | 406,667 | 0.61x | 1,393 | 4mo | category Testing, keyword "testing" | compare |
| mockall_derive Pulled in | 406,392 | 0.61x | 2 | 4mo | category Testing, keyword "testing" | compare |
| insta Widely used | 379,798 | 0.57x | 4,970 | 21d | category Testing, keyword "testing" | compare |
| derive_arbitrary Pulled in | 369,897 | 0.56x | 9 | 18d | category Testing, keyword "testing" | compare |
| assert-json-diff Established | 491,066 | 0.74x | 178 | 4.3y | 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 proptest; 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 proptest: 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 proptest, 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 quiet for years. 1,442,265 real downloads a day.static_assertionsRust crate. Compile-time assertions to ensure that invariants are met. Real use: 1.4M downloads a day on quiet days; 1,688 crates depend on it.Read it next →Also worth your time