Rust crate owner · data Oct 24, 2026
SimonSapin: Rust crates and real downloads
Every crate SimonSapin can publish on crates.io, among the top 1000. SimonSapin on GitHub · on crates.io
Short answerSimon Sapin (crates.io SimonSapin) owns 24 of the 1000 most-downloaded Rust crates. Together they get about 30,233,209 real downloads a day on quiet days (release-day spikes removed), rank #13 of the 492 owners we track. The biggest is smallvec at 3,868,589 a day with 4,345 crates depending on it. 10 shipped a release in the last 90 days; 8 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 |
|---|---|---|---|---|---|
| smallvec Widely used | 3,868,589 | 4,345 | -2% | 1d | #32 |
| percent-encoding Widely used | 2,659,462 | 2,677 | +0% | 14mo | #82 |
| idna Established | 2,577,546 | 246 | -1% | 14mo | #66 |
| url Foundational | 2,520,673 | 16,906 | -2% | 10mo | #89 |
| form_urlencoded Established | 2,438,245 | 426 | +0% | 14mo | #104 |
| unicode-width Widely used | 2,194,046 | 3,230 | -4% | 13mo | #107 |
| fnv Established | 2,156,483 | 831 | -1% | 6.4y | #110 |
| unicode-segmentation Widely used | 1,727,473 | 1,989 | -1% | 5mo | #219 |
| unicode-xid Established | 1,460,280 | 128 | -10% | 2.1y | #202 |
| unicode-normalization Widely used | 1,371,256 | 1,489 | +8% | 8d | #217 |
| unicode-bidi Established | 1,058,529 | 190 | +3% | 22mo | #267 |
| brotli Established | 841,265 | 613 | +12% | 52d | #431 |
| utf-8 Pulled in | 773,776 | 22 | -5% | 5.5y | #434 |
| string_cache Pulled in | 605,733 | 78 | +18% | 2mo | #587 |
| markup5ever Pulled in | 511,767 | 91 | +21% | 43d | #781 |
| html5ever Established | 506,290 | 380 | +21% | 40d | #784 |
| string_cache_codegen Pulled in | 479,969 | 15 | +24% | 40d | #796 |
| tendril Established | 468,184 | 102 | +23% | 4mo | #846 |
| cssparser Established | 431,240 | 223 | +12% | 47d | #890 |
| selectors Pulled in | 365,308 | 87 | +5% | 24d | #973 |
| dtoa-short Pulled in | 354,453 | 1 | +12% | 2.4y | #978 |
| cssparser-macros Pulled in | 345,532 | 3 | +7% | 47d | #987 |
| ascii Established | 309,627 | 117 | -8% | 4.1y | #815 |
| matches Established | 207,483 | 225 | -16% | 3.8y | #592 |
Mostly in: No standard library (5), Parser implementations (3), Web programming (3), Encoding (2), Text processing (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: 14 top crates, about 29,541,613 real downloads a day.cuviperRead it next →Also worth your time