Rust crate owner · data Oct 24, 2026
kou: Rust crates and real downloads
Every crate kou can publish on crates.io, among the top 1000. kou on GitHub · on crates.io
Short answerSutou Kouhei (crates.io kou) owns 12 of the 1000 most-downloaded Rust crates. Together they get about 3,469,452 real downloads a day on quiet days (release-day spikes removed), rank #93 of the 492 owners we track. The biggest is arrow-buffer at 320,450 a day with 202 crates depending on it. 12 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 |
|---|---|---|---|---|---|
| arrow-buffer Established | 320,450 | 202 | +5% | 9d | #874 |
| arrow-schema Established | 320,142 | 825 | +6% | 9d | #873 |
| arrow-array Established | 319,689 | 750 | +6% | 9d | #875 |
| arrow-select Established | 317,113 | 115 | +5% | 9d | #882 |
| arrow-data Pulled in | 314,185 | 69 | +7% | 9d | #877 |
| arrow-cast Pulled in | 299,519 | 94 | +5% | 9d | #892 |
| arrow-ipc Established | 280,240 | 191 | +3% | 9d | #922 |
| arrow-ord Pulled in | 268,001 | 45 | +10% | 9d | #957 |
| arrow-arith Pulled in | 261,968 | 33 | +9% | 9d | #969 |
| arrow-string Pulled in | 259,655 | 9 | +10% | 9d | #974 |
| arrow Widely used | 255,228 | 1,308 | +11% | 9d | #968 |
| arrow-row Pulled in | 253,262 | 23 | +11% | 9d | #979 |
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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: 12 top crates, about 3,469,452 real downloads a day.kszucsRead it next →Also worth your time