Rust crate owner · data Oct 24, 2026
npmccallum: Rust crates and real downloads
Every crate npmccallum can publish on crates.io, among the top 1000. npmccallum on GitHub · on crates.io
Short answerNathaniel McCallum (crates.io npmccallum) owns 3 of the 1000 most-downloaded Rust crates. Together they get about 2,325,395 real downloads a day on quiet days (release-day spikes removed), rank #141 of the 492 owners we track. The biggest is ciborium at 775,492 a day with 902 crates depending on it. 0 shipped a release in the last 90 days; 0 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 |
|---|---|---|---|---|---|
| ciborium Established | 775,492 | 902 | +7% | 2.7y | #465 |
| ciborium-ll Pulled in | 775,035 | 10 | +7% | 2.7y | #466 |
| ciborium-io Pulled in | 774,868 | 27 | +7% | 2.7y | #464 |
Mostly in: Data structures (3), No standard library (3), Embedded development (3), Encoding (2), Parsing tools (2).
Check any crates.io account
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: 2 top crates, about 2,319,709 real downloads a day.justsmthRead it next →Also worth your time