Rust crate owner · data Oct 24, 2026
cuviper: Rust crates and real downloads
Every crate cuviper can publish on crates.io, among the top 1000. cuviper on GitHub · on crates.io
Short answerJosh Stone (crates.io cuviper) owns 14 of the 1000 most-downloaded Rust crates. Together they get about 29,541,613 real downloads a day on quiet days (release-day spikes removed), rank #14 of the 492 owners we track. The biggest is indexmap at 4,883,122 a day with 6,422 crates depending on it. 4 shipped a release in the last 90 days; 3 are gaining on the field and 0 losing ground.
Their crates, by real downloads
| Crate | Real downloads a day | Dependents | Trend vs field | Last release | crates.io rank |
|---|---|---|---|---|---|
| indexmap Widely used | 4,883,122 | 6,422 | -3% | 49d | #12 |
| autocfg Pulled in | 3,840,273 | 82 | -7% | 5mo | #26 |
| either Widely used | 3,049,603 | 1,488 | -3% | 18d | #57 |
| equivalent Pulled in | 2,919,252 | 44 | -1% | 11d | #95 |
| num-traits Widely used | 2,894,023 | 7,561 | +1% | 2.5y | #56 |
| num-integer Established | 2,011,508 | 701 | +8% | 2mo | #146 |
| num-bigint Widely used | 1,899,489 | 2,449 | +12% | 4mo | #189 |
| rayon Foundational | 1,615,491 | 11,972 | +2% | 6mo | #224 |
| rayon-core Pulled in | 1,568,771 | 69 | +3% | 14mo | #232 |
| num-complex Widely used | 1,201,013 | 1,140 | +10% | 21mo | #320 |
| num-iter Pulled in | 1,144,112 | 32 | +5% | 4mo | #324 |
| num-rational Established | 1,035,328 | 456 | +10% | 21mo | #321 |
| num Widely used | 811,973 | 2,024 | +11% | 21mo | #405 |
| num-derive Widely used | 667,655 | 1,317 | +5% | 3mo | #484 |
Mostly in: Science (8), Data structures (7), Algorithms (7), No standard library (6), Concurrency (2).
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How we count
Owners: crates.io owners API (users only; teams are not listed), fetched Oct 24, 2026. Real downloads a day = the median day with no release that day or the day before, per crate, summed. Trend = last 30 days against the first 30, read against the median tracked crate. Method: our crates.io study.
Up next
The next owner by real downloads: 21 top crates, about 27,518,179 real downloads a day.sfacklerRead it next →Also worth your time