Rust crate owner · data Oct 24, 2026
hsivonen: Rust crates and real downloads
Every crate hsivonen can publish on crates.io, among the top 1000. hsivonen on GitHub · on crates.io
Short answerHenri Sivonen (crates.io hsivonen) owns 5 of the 1000 most-downloaded Rust crates. Together they get about 6,682,461 real downloads a day on quiet days (release-day spikes removed), rank #47 of the 492 owners we track. The biggest is idna_adapter at 2,429,162 a day with 41 crates depending on it. 1 shipped a release in the last 90 days; 0 are gaining on the field and 2 losing ground.
Their crates, by real downloads
| Crate | Real downloads a day | Dependents | Trend vs field | Last release | crates.io rank |
|---|---|---|---|---|---|
| idna_adapter Pulled in | 2,429,162 | 41 | -2% | 6mo | #210 |
| utf8_iter Pulled in | 2,136,300 | 12 | +3% | 2.9y | #236 |
| encoding_rs Widely used | 1,414,714 | 1,424 | +6% | 30d | #244 |
| write16 Pulled in | 352,874 | 6 | -10% | 4.3y | #597 |
| utf16_iter Pulled in | 349,411 | 3 | -10% | 2.9y | #596 |
Mostly in: Internationalization (i18n) (5), Text processing (4), Encoding (3), No standard library (1), Web programming (1).
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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: 5 top crates, about 6,447,269 real downloads a day.danburkertRead it next →Also worth your time