Rust crate owner · data Oct 24, 2026
tarcieri: Rust crates and real downloads
Every crate tarcieri can publish on crates.io, among the top 1000. tarcieri on GitHub · on crates.io
Short answerTony Arcieri (crates.io tarcieri) owns 27 of the 1000 most-downloaded Rust crates. Together they get about 34,885,553 real downloads a day on quiet days (release-day spikes removed), rank #11 of the 492 owners we track. The biggest is cpufeatures at 4,097,423 a day with 81 crates depending on it. 10 shipped a release in the last 90 days; 7 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 |
|---|---|---|---|---|---|
| cpufeatures Pulled in | 4,097,423 | 81 | +6% | 59d | #55 |
| sha2 Foundational | 3,510,276 | 22,608 | +5% | 12d | #61 |
| zeroize Widely used | 2,397,082 | 5,204 | -1% | 18d | #139 |
| const-oid Established | 2,079,241 | 160 | +11% | 10mo | #260 |
| sha1 Widely used | 2,004,209 | 2,496 | +8% | 3mo | #226 |
| der Established | 1,514,408 | 378 | +4% | 49d | #278 |
| signature Established | 1,419,605 | 417 | +7% | 6mo | #288 |
| base64ct Established | 1,305,115 | 439 | +2% | 9mo | #305 |
| spki Established | 1,302,398 | 198 | +4% | 19d | #294 |
| hybrid-array Established | 1,257,022 | 108 | +23% | 46d | #634 |
| pkcs8 Established | 1,245,962 | 361 | +3% | 6mo | #304 |
| pem-rfc7468 Pulled in | 1,099,295 | 73 | +4% | 12mo | #359 |
| zeroize_derive Pulled in | 979,424 | 26 | +5% | 4mo | #427 |
| crypto-bigint Established | 937,488 | 167 | +2% | 1d | #408 |
| base16ct Established | 922,439 | 174 | +6% | 10mo | #456 |
| elliptic-curve Established | 855,110 | 244 | +5% | 4mo | #476 |
| sec1 Pulled in | 854,812 | 85 | +6% | 7mo | #487 |
| cmov Pulled in | 852,311 | 3 | +22% | 5mo | #852 |
| ctutils Pulled in | 838,314 | 55 | +24% | 1d | #866 |
| ecdsa Established | 833,119 | 261 | +5% | 4mo | #488 |
| rfc6979 Pulled in | 825,273 | 15 | +6% | 4mo | #493 |
| universal-hash Pulled in | 811,380 | 11 | +16% | 8mo | #517 |
| polyval Pulled in | 706,359 | 19 | +17% | 3mo | #570 |
| pkcs1 Pulled in | 704,103 | 65 | -2% | 19d | #511 |
| aes-gcm Widely used | 653,891 | 1,968 | +20% | 2mo | #605 |
| primeorder Pulled in | 634,217 | 20 | +7% | 4mo | #691 |
| k256 Established | 245,278 | 806 | +5% | 4mo | #977 |
Mostly in: No standard library (27), Cryptography (25), Data structures (9), Encoding (9), Parser implementations (8).
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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.
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The next owner by real downloads: 20 top crates, about 34,213,373 real downloads a day.BurntSushiRead it next →Also worth your time