Crates / Category
Rust crates · category · data Oct 24, 2026
No standard library crates by real downloads
crates.io describes this category as: “Crates that are able to function without the Rust standard library.” Below are the 107 crates in it among the 300 most-downloaded crates, ranked by real downloads (quiet-day baseline) instead of raw count.
Short answerBy steady daily use, hashbrown leads No standard library with 8,927,960 real downloads a day (widely used and steady). 48 of the 107 have 1,000+ dependents; 13 have shipped nothing in 2+ years. Release spikes barely matter here: the median crate got 0.0% of its downloads within 2 days of a release.
107 crates
| Compare | ||||||
|---|---|---|---|---|---|---|
| hashbrownWidely used | 8,927,960 | 2,468 | 6mo | -2% | 2.8B | |
| getrandomWidely used | 7,623,482 | 5,558 | 4mo | +1% | 2.4B | |
| randFoundational | 5,938,557 | 33,204 | 34d | +3% | 2B | |
| rand_coreWidely used | 5,860,713 | 2,597 | 52d | +4% | 2B | |
| bitflagsWidely used | 5,776,464 | 5,303 | 44d | +0% | 2.1B | |
| thiserrorFoundational | 5,048,791 | 75,923 | 31d | +2% | 1.7B | |
| libcFoundational | 4,964,021 | 17,338 | 8d | -6% | 1.8B | |
| indexmapWidely used | 4,883,122 | 6,422 | 49d | -2% | 1.7B | |
| itertoolsWidely used | 4,545,996 | 8,656 | 4mo | +1% | 1.7B | |
| unicode-identEstablished | 4,390,154 | 222 | 12d | +0% | 1.6B | |
| serdeFoundational | 4,327,945 | 133,588 | 3mo | -5% | 1.6B | |
| serde_jsonFoundational | 4,294,696 | 113,141 | 13d | -5% | 1.5B | |
| itoaEstablished | 4,278,839 | 791 | 7mo | -4% | 1.5B | |
| serde_deriveWidely used | 4,161,400 | 6,497 | 3mo | -3% | 1.5B | |
| cpufeaturesPulled in | 4,097,423 | 81 | 59d | +7% | 1.1B | |
| rand_chachaWidely used | 4,016,327 | 1,903 | 9mo | +0% | 1.6B | |
| heckWidely used | 3,901,922 | 1,865 | 2.6y | -2% | 1.5B | |
| digestWidely used | 3,862,411 | 1,197 | 6mo | +6% | 1.2B | |
| block-bufferPulled in | 3,815,018 | 23 | 4mo | +7% | 1.2B | |
| serde_coreEstablished | 3,794,333 | 229 | 3mo | -1% | 74M | |
| crypto-commonPulled in | 3,766,260 | 85 | 5mo | +6% | 1B | |
| sha2Foundational | 3,510,276 | 22,608 | 12d | +7% | 1.1B | |
| zmijPulled in | 3,408,700 | 96 | 3mo | +1% | 579M | |
| pin-project-liteWidely used | 3,270,978 | 1,708 | 8mo | -2% | 1.2B | |
| ryuEstablished | 3,105,583 | 390 | 8mo | -7% | 1.3B | |
| eitherWidely used | 3,049,603 | 1,488 | 18d | -2% | 1.1B | |
| foldhashEstablished | 3,043,165 | 333 | 14mo | +7% | 718M | |
| typenumEstablished | 3,031,404 | 399 | 5mo | +1% | 1B | |
| slabEstablished | 3,013,568 | 619 | 9mo | -2% | 1B | |
| equivalentPulled in | 2,919,252 | 44 | 11d | +0% | 957M | |
| num-traitsWidely used | 2,894,023 | 7,561 | 2.5y | +3% | 1.1B | |
| anyhowFoundational | 2,875,638 | 52,113 | 3mo | -2% | 1.1B | |
| lock_apiEstablished | 2,874,492 | 143 | 3d | -6% | 1.1B | |
| generic-arrayEstablished | 2,819,219 | 542 | 2mo | +1% | 1B | |
| errnoEstablished | 2,791,762 | 259 | 13mo | +4% | 964M | |
| semverWidely used | 2,771,038 | 4,141 | 7mo | -2% | 1.1B | |
| scopeguardEstablished | 2,724,718 | 567 | 3.3y | -1% | 1.1B | |
| crossbeam-utilsEstablished | 2,696,777 | 605 | 49d | +2% | 1B | |
| rustversionEstablished | 2,686,635 | 652 | 4mo | -1% | 879M | |
| percent-encodingWidely used | 2,659,462 | 2,677 | 14mo | +1% | 1B | |
| rustls-webpkiEstablished | 2,654,129 | 240 | 4d | +1% | 896M | |
| tracingFoundational | 2,611,879 | 46,220 | 10mo | +2% | 966M | |
| yokeEstablished | 2,599,767 | 104 | 2d | -3% | 696M | |
| zerovec-derivePulled in | 2,561,390 | 6 | 2d | +6% | 678M | |
| uuidFoundational | 2,553,829 | 22,614 | 1d | -1% | 913M | |
| icu_providerPulled in | 2,521,500 | 93 | 2d | +5% | 681M | |
| urlFoundational | 2,520,673 | 16,906 | 10mo | +0% | 986M | |
| zerovecPulled in | 2,516,803 | 60 | 2d | +5% | 684M | |
| icu_collectionsPulled in | 2,507,923 | 25 | 2d | +5% | 678M | |
| icu_properties_dataPulled in | 2,505,718 | 8 | 2d | +3% | 684M | |
| icu_propertiesEstablished | 2,501,772 | 118 | 2d | +3% | 68M | |
| zerofromPulled in | 2,490,667 | 27 | 5mo | +0% | 67M | |
| icu_normalizer_dataPulled in | 2,473,115 | 10 | 2d | +4% | 672M | |
| icu_normalizerPulled in | 2,472,932 | 89 | 2d | +4% | 669M | |
| lazy_staticFoundational | 2,449,997 | 10,953 | 23d | +4% | 1.1B | |
| ppv-lite86Pulled in | 2,441,634 | 6 | 20mo | +1% | 1M | |
| stable_deref_traitEstablished | 2,440,590 | 110 | 12mo | +2% | 764M | |
| form_urlencodedEstablished | 2,438,245 | 426 | 14mo | +1% | 907M | |
| timeWidely used | 2,434,189 | 6,747 | 3mo | -2% | 1B | |
| yoke-derivePulled in | 2,432,865 | 14 | 24d | +6% | 687M | |
| idna_adapterPulled in | 2,429,162 | 41 | 6mo | +0% | 644M | |
| zeroizeWidely used | 2,397,082 | 5,204 | 18d | +0% | 802M | |
| schemarsWidely used | 2,383,996 | 6,659 | 12d | +5% | 575M | |
| zerofrom-derivePulled in | 2,353,727 | 3 | 39d | +6% | 662M | |
| tinyvecEstablished | 2,308,962 | 270 | 41d | +5% | 827M | |
| zerotriePulled in | 2,273,735 | 20 | 2mo | +10% | 503M | |
| potential_utfPulled in | 2,261,800 | 17 | 2mo | +10% | 5M | |
| icu_locale_coreEstablished | 2,233,122 | 107 | 2d | +9% | 499M | |
| crc32fastWidely used | 2,229,287 | 1,440 | 4d | +8% | 791M | |
| utf8parsePulled in | 2,191,353 | 13 | 2.4y | -6% | 711M | |
| httparseEstablished | 2,183,298 | 609 | 20mo | +3% | 82M | |
| wasiPulled in | 2,177,567 | 58 | 13mo | -9% | 843M | |
| phfWidely used | 2,170,809 | 1,219 | 4mo | +12% | 644M | |
| subtleWidely used | 2,159,165 | 2,362 | 2.3y | +1% | 799M | |
| hmacWidely used | 2,124,794 | 4,359 | 7mo | +5% | 681M | |
| num-convPulled in | 2,114,479 | 4 | 5mo | -3% | 645M | |
| ringWidely used | 2,112,308 | 1,837 | 19mo | +0% | 834M | |
| const-oidEstablished | 2,079,241 | 160 | 10mo | +13% | 56M | |
| crossbeam-epochEstablished | 2,073,178 | 114 | 49d | +3% | 753M | |
| byteorderWidely used | 2,056,746 | 4,780 | 3.0y | -2% | 894M | |
| num-integerEstablished | 2,011,508 | 701 | 2mo | +10% | 778M | |
| async-traitFoundational | 2,011,334 | 26,080 | 3mo | +0% | 751M | |
| sha1Widely used | 2,004,209 | 2,496 | 3mo | +10% | 613M | |
| hexFoundational | 1,974,541 | 14,719 | 5.6y | +3% | 739M | |
| bumpaloEstablished | 1,968,716 | 546 | 5mo | -1% | 667M | |
| ahashWidely used | 1,968,676 | 2,097 | 18mo | -5% | 854M | |
| simd-adler32Pulled in | 1,931,920 | 26 | 3mo | +2% | 474M | |
| powerfmtPulled in | 1,889,786 | 5 | 19d | +2% | 629M | |
| try-lockPulled in | 1,879,742 | 9 | 2.9y | +3% | 717M | |
| portable-atomicEstablished | 1,871,271 | 512 | 2mo | +0% | 532M | |
| arrayvecWidely used | 1,733,744 | 1,215 | 4mo | +3% | 64M | |
| memoffsetEstablished | 1,651,833 | 232 | 2.6y | -7% | 807M | |
| derive_moreWidely used | 1,604,594 | 3,690 | 10mo | -3% | 55M | |
| libmWidely used | 1,556,360 | 1,263 | 9mo | +8% | 539M | |
| derEstablished | 1,514,408 | 378 | 49d | +6% | 528M | |
| pin-project-internalPulled in | 1,484,850 | 1 | 5mo | -6% | 644M | |
| pin-projectWidely used | 1,484,314 | 1,406 | 5mo | -6% | 644M | |
| minimal-lexicalPulled in | 1,454,881 | 2 | 5.1y | +6% | 593M | |
| static_assertionsWidely used | 1,442,265 | 1,688 | 7.0y | +2% | 562M | |
| signatureEstablished | 1,419,605 | 417 | 6mo | +9% | 502M | |
| halfWidely used | 1,416,928 | 1,633 | 12mo | +5% | 524M | |
| data-encodingEstablished | 1,416,151 | 854 | 3mo | +9% | 48M | |
| ordered-floatWidely used | 1,379,318 | 1,143 | 2mo | +1% | 505M | |
| pasteWidely used | 1,338,247 | 3,246 | 2.5y | -3% | 574M | |
| spkiEstablished | 1,302,398 | 198 | 19d | +6% | 482M | |
| winapiWidely used | 1,251,224 | 1,603 | 6.3y | -2% | 545M | |
| unicode-bidiEstablished | 1,058,529 | 190 | 22mo | +5% | 55M |
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Click a column to sort; press + to add a crate to a comparison. Real / day = median downloads on days with no release that day or the day before. Each crate's page shows its verdict and the 4 rules behind it. Why this method · this category on crates.io
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