Rust crate owner · data Oct 24, 2026
dtolnay: Rust crates and real downloads
Every crate dtolnay can publish on crates.io, among the top 1000. dtolnay on GitHub · on crates.io
Short answerDavid Tolnay (crates.io dtolnay) owns 37 of the 1000 most-downloaded Rust crates. Together they get about 87,360,463 real downloads a day on quiet days (release-day spikes removed), rank #2 of the 492 owners we track. The biggest is syn at 8,378,886 a day with 18,848 crates depending on it. 10 shipped a release in the last 90 days; 1 are gaining on the field and 3 losing ground.
Their crates, by real downloads
| Crate | Real downloads a day | Dependents | Trend vs field | Last release | crates.io rank |
|---|---|---|---|---|---|
| syn Foundational | 8,378,886 | 18,848 | +4% | 12d | #2 |
| thiserror Foundational | 5,048,791 | 75,923 | +1% | 31d | #15 |
| thiserror-impl Pulled in | 5,046,904 | 5 | +1% | 31d | #14 |
| quote Foundational | 5,007,445 | 18,227 | -8% | 3mo | #8 |
| proc-macro2 Foundational | 4,890,919 | 16,351 | -8% | 3mo | #9 |
| unicode-ident Established | 4,390,154 | 222 | -1% | 12d | #20 |
| serde Foundational | 4,327,945 | 133,588 | -6% | 3mo | #19 |
| serde_json Foundational | 4,294,696 | 113,141 | -6% | 13d | #24 |
| itoa Established | 4,278,839 | 791 | -5% | 7mo | #22 |
| serde_derive Widely used | 4,161,400 | 6,497 | -5% | 3mo | #23 |
| serde_core Established | 3,794,333 | 229 | -2% | 3mo | #158 |
| zmij Pulled in | 3,408,700 | 96 | -1% | 3mo | #249 |
| ryu Established | 3,105,583 | 390 | -8% | 8mo | #37 |
| anyhow Foundational | 2,875,638 | 52,113 | -4% | 3mo | #65 |
| semver Widely used | 2,771,038 | 4,141 | -4% | 7mo | #60 |
| rustversion Established | 2,686,635 | 652 | -3% | 4mo | #115 |
| async-trait Foundational | 2,011,334 | 26,080 | -2% | 3mo | #153 |
| prettyplease Widely used | 1,584,839 | 1,032 | -7% | 3mo | #258 |
| paste Widely used | 1,338,247 | 3,246 | -5% | 2.5y | #251 |
| dyn-clone Established | 1,320,741 | 537 | +3% | 15mo | #338 |
| ref-cast Established | 1,265,265 | 175 | +8% | 2mo | #418 |
| ref-cast-impl Pulled in | 1,265,195 | 1 | +8% | 2mo | #419 |
| serde_yaml Widely used | 1,238,004 | 7,766 | -19% | 2.6y | #313 |
| serde_path_to_error Established | 1,101,806 | 642 | +7% | 13mo | #391 |
| unsafe-libyaml Pulled in | 965,195 | 20 | -9% | 2.6y | #393 |
| serde_derive_internals Pulled in | 927,225 | 51 | +14% | 3mo | #480 |
| serde_repr Widely used | 895,570 | 1,237 | +2% | 3mo | #407 |
| indoc Widely used | 810,408 | 1,667 | -15% | 15d | #377 |
| erased-serde Established | 763,150 | 362 | -7% | 8mo | #490 |
| typeid Pulled in | 622,632 | 34 | -7% | 20mo | #659 |
| serde_bytes Widely used | 545,340 | 1,610 | -6% | 13mo | #545 |
| dtoa Pulled in | 496,627 | 48 | +2% | 10mo | #640 |
| inventory Widely used | 449,319 | 1,291 | -5% | 17d | #726 |
| seq-macro Established | 387,498 | 211 | +0% | 20mo | #799 |
| unindent Established | 379,604 | 100 | -34% | 20mo | #526 |
| serde-untagged Pulled in | 307,093 | 35 | +1% | 13mo | #981 |
| proc-macro-hack Established | 217,464 | 200 | -7% | 3.8y | #652 |
Mostly in: No standard library (27), No dynamic allocation (17), Encoding (10), Procedural macro helpers (6), Rust patterns (6).
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This page covers crates in the top 1000. For every crate an account owns, live, use Check your crates.
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: 34 top crates, about 57,283,526 real downloads a day.taiki-eRead it next →Also worth your time