State of the Rust/Cargo crates ecosystem // Lib.rs

Growth of the crates.io registry

Daily downloads since Rust 1.0, 7-day average

Crate downloads are growing at a rate of 2.1× per year.

crates.io has served 230.4 million downloads in a single day, which is more than all downloads in the first 30 months since the release of Rust 1.0 in May 2015.

Traffic during weekdays is typically 2.8× higher than during weekends (up from 2.8× a year before).

Number of users/teams owning a crate on crates.io

There are 41,961 users or teams that have a crate on crates.io. The number of owners is growing at a rate of 1.2× per year.

Lib.rs has indexed 161578 crates.

Dependencies

Number of direct dependencies

Number of libraries explicitly used by each crate. Includes dev, build-time and optional dependencies.

0	1	2	3	4	5	6	7	8	9
28104	14564	14727	15551	12648	10146	8363	7218	6267	5192

10	11	≥12	≥14	≥16	≥18	≥20	≥25	≥30	≥40	≥60	≥80	≥100	≥120	≥150
4210	3935	5777	3962	3503	2336	3444	1882	1689	836	162	45	21	2	7
mongodb-gridfs futures-enum systemd_socket ruuvitag-upload ic-stable-structures	cosmic-cli epsilonz fabric-system tembo-telemetry arrow-digest	kcheck tencent-qcloud-cos-rs parrot-network google-plus1 ooproxy	easy-qjs frame-system mqtt-async-client ida speedrun-api	cargo-index-transit deployment-changelog linera-alloy-signer-ledger google-secretmanager1-cli tower-sessions-surrealdb-store	modio-logger-db turn cueball-dns-resolver mpstthree passcod-accord	rsb swc_ecma_compat_es2015 turn-server zine mathcat	rumqttd fpd async-acme acme-rfc8555 leptonic	cargo-nw tentacle-secio libp2p-rs bastion ambient_model_import	qcs lamellar node-launchpad hypers_core tmkms	rnacos sosistab stm32f4xx-hal r-u-still-there alloy-provider	liboxen surrealdb-sql tardis wasmer-wasix bitcoin-top	holochain staging-kusama-runtime surrealdb-core-nightly westend-runtime lingua	zawk coreutils	forest-filecoin polkadot-sdk uhg-custom-appollo-roouter zigbee2mqtt-types homestar-workspace-hack

Number of transitive reverse dependencies (popularity)

How often each library crate is used as a dependency in other crates, directly or indirectly. Includes dev, build-time, and optional dependencies.

1	2	≥5	≥15	≥50	≥100	≥300	≥1000	≥2500	≥5000	≥10000	≥20000	≥50000
21520	16241	9383	4998	1675	1510	916	442	184	123	74	99	26
smashnet rigz_runtime am-api-proc-macro nwn-rs-codegen google-consumersurveys2	zksync_env_config omango-util scdlang cml-chain-wasm tokio-wifiscanner	type-layout spdx-rs near-vm-vm scrawl bevy_replicon	librashader-common plotlib elrond-wasm audio-processor-traits pact_models	async_zip lol_html rspack_error serde-json-core tetsy-keccak-hash	solana-compute-budget trycmd volatile bitcoincore-rpc-json aleo-std websocket ark-relations trees test_tools bio	gix-trace jsonrpsee-core tokio-openssl gloo sdl2 bip39 opentelemetry_api opencv-binding-generator frunk_core gix-hash	const_format_proc_macros const_format utf8-width traitobject simdutf8 wayland-protocols generator lexical-util color-eyre impl-serde	k256 indicatif matrixmultiply cesu8 rawpointer serde_cbor displaydoc curve25519-dalek-derive signal-hook kv-log-macro	pest sha3 fuchsia-cprng rand_pcg os_str_bytes signature rdrand approx encode_unicode kernel32-sys	humantime vec_map unicode-xid vcpkg clap_derive num_cpus winreg static_assertions env_logger arrayvec	socket2 errno semver cpufeatures rustix http chrono linux-raw-sys mime zerocopy-derive	serde itoa windows_aarch64_gnullvm syn serde_json log ryu windows_i686_gnullvm windows_aarch64_msvc windows_x86_64_gnullvm

Development

How long a crate has been in development

Time between its oldest and newest release.

one-off	≤1 week	≤1 month	≤6 months	≤1 year	≤2 years	≤3 years	≤5 years	≤7 years	≤10 years
46510	29445	9867	19109	12861	14680	8448	8980	3102	1589
boing-internals ya yesqlr oxidate blackjack_commons	epsilonz cargo-vistree console-codes static-self-derive group-varint-offset-encoding	ggez_tools dreck markdown_converter nova-r8 nasoone-lib	ruuvitag-upload bitcoin-scriptpubkeyman bon qst candid_client	lapce-xi-rope genesis-impl edcert-letter resources encodings	afetch-colored fuel-gql-client bevy_oddio git-bitmap macarunes	yelp-fusion-rs oml-game keebrs libusbk-sys atsam4n16b-pac	quire ms3d nodrop-union termprogress castaway	cargo-trim ghost trie-rs arabic_reshaper obliviate	base64-serde subtle block-utils google-bigquerydatatransfer1 fletcher

Time without any updates

Time since crate's most recent release. Keep in mind that some crates can be "done" and not need regular updates.

≤1 month	≤3 months	≤6 months	≤1 year	≤2 years	≤3 years	≤4 years	≤5 years	≤7 years	≤10 years
17741	11106	12828	20033	29908	19136	14799	11482	11761	5797
setwallpaper google-displayvideo1 tower-sessions-surrealdb-store slint-macros native-pkcs11	cwe-api repocat wayland-sys lhtlp shizen-macros	serde_at rustygeard bevy_synthizer run-tool test-format	text_maid finput lbl-python pyluwen huawei-cloud-api-definitions-IEF	diesel-streamer jstz_core italo-api wei-build libcachebust	filewatch study13 const-slice nft-server task-executor	mri oxidate winres wasmedge-runtime-rs fluvio-protocol-core	raqote-display drogue-bme680 imex an-view stdrename	nodrop-union java-desc auto_enumerate chai flutter-engine	plugger codeviz_common md5sum segment_analytics tokio-by-hand

Age

Time since crate's first release.

≤1 month	≤3 months	≤6 months	≤1 year	≤2 years	≤3 years	≤4 years	≤5 years	≤7 years	≤10 years
4100	5850	8315	17243	31772	23342	19155	16117	17706	10991
kawala pmse-win planetary yesqlr tuas_boussinesq_solver	argfetch lhtlp docid sqlr stac-duckdb	say-hello-tobialbertino tramex-tools globescraper solana-sbf-rust-call-depth kith	sandwich-rs titz wrk koto_regex fieldless_enum_tools	biome_js_transform wei-build presenterm wender swc_ecma_compat_es2015	nft-server az-vminfo rama zenoh-link-tcp study13	win_ocr_bindings baselinker wasmpng vizia qcs	wimp drogue-bme680 animation sprs_suitesparse_camd raqote-display	oasis-core static_test displaydoc libcalc war-cli	vmx-just-a-test-001-maincrate content-security-policy tokio-by-hand mar xmc4700

Number of releases per crate

Number of unique versions of each crate, excluding yanked versions.

1	2	≥4	≥8	≥16	≥32	≥50	≥100	≥500
49243	37763	30262	20122	10343	3515	2528	764	51
ya fbnc blackjack_commons boing-internals yesqlr	bevy_simple_2d_outline clipboard-ext systemd_socket static-self-derive stara	entropy-client markdown_converter libsecp256k1-core bitmagic-sys cameraunit_fli	reddit-fs drone-stm32-map-svd clap-interactive git-bitmap stuart	zenoh-link-tcp futures-enum unhtml_derive stretch tc-btree	google-serviceregistryalpha proc-macro-hack arrow-schema workflow-rpc-macros huawei-cloud-api-definitions-IEF	serde_valid_derive castle_tokenizer fimg medullah-web multipart	snarkvm-algorithms async-graphql-rocket wasmtime-wasi-nn wasmtime-fiber mungos	rustc-ap-rustc_errors rustc-ap-syntax_pos oni-comb-uri-rs rustc-ap-rustc_cratesio_shim swc_ecma_transforms_base

Number of crates per user

How many crates a single account (user or team) owns. Excluding all other people in the world who have 0 crates.

1	2	3	≥6	≥25	≥50	≥75	≥100	≥150	≥200
20056	7206	7466	5740	719	149	75	52	18	23
dgoodlad blob42 fd michaelklishin shanesveller	stephenyu robey mudge Mange zacheryph	ebassi bjeanes tuffy kivikakk joshuaclayton	mpalmer mr-adult aruiz zimbatm drwsk	ia0 haraldh hd-gmbh-bot waywardmonkeys reu cloudflare Keats vi013t	arcnmx ForsakenHarmony facebook phodal holochain-release-automation2 rust-embedded Berrysoft romac	zicklag sudo-shashank iliana casey rise0chen asonix bbqsrc nullchinchilla	rivy boozook breathx mikevoronov madsmtm PistonDevelopers demurgos FL03	Traverse-Research-CI-runner cart howardwu Manishearth yoshuawuyts newpavlov miralandlabs tony-iqlusion	RustCrypto kennykerr heaths kdy1 MaterializeInc aws-sdk-rust-ci parity-crate-owner paritytech

Sizes

Crate size (KB)

Amount of data downloaded as a compressed tarball. Size of code + bundled data files. Individual crate pages show size of uncompressed code.

≤1KB	≤10KB	≤50KB	≤100KB	≤500KB	≤1MB	≤5MB	≤10MB	≤41MB
19441	56334	47849	7626	8294	2067	3196	648	32
cnidarium aeron-archive-client ipkv peon chainlink_api	kelk-env tiny_update_notifier json-mel console-codes scotch-host	kcheck shunkakinoki lhtlp tembo-telemetry ffmpeg-sys	lodepng libwebnovel rusty-snake vbscript gringron_api	sidh cargo-compete rbspy-oncpu solana-rpc zk_evm_abstractions	gaviota-sys poro localghost tlsh2 azure_mgmt_cosmosdb	lingua-indonesian-language-model gled dicom_dictionary_parser nf-rated delta_2a_lidar	f256_pow2_div_pow5_lut mwa_hyperdrive bindet icu_datagen just-latex	bpe-tokenizer rusty_v8 efm32lg-pac efm32gg12b-pac deno_cli_lib_windmill

Crate total bandwidth (GB)

Amount of data downloaded as a compressed tarball × number of downloads per month.

≥1MB	≥10MB	≥100MB	≥1GB	≥10GB	≥100GB	≥1TB	≥5TB	≥10TB
54148	31549	13251	5610	1616	519	68	11	15
iop-morpheus-proto ruuvitag-upload lunatic-db	turn-server depends tests_bin moksha-mint	verusfmt rustlings-macros axiom-eth prolog_parser mqtt-async-client	tarpc-plugins secp256kfun tower-util gbm hgvs i-slint-backend-selector	tquic rust-analyzer-salsa spirv-tools-sys proc-macro-utils fasttext ipc-channel aws-sdk-pinpoint	signature serde_urlencoded cargo-make pbkdf2 webpki window-vibrancy ark-poly arrow	serde_derive chrono-tz libnghttp2-sys time toml_edit mio bindgen minimal-lexical indexmap	librocksdb-sys syn tokio libz-sys regex-syntax rustix winapi image aws-lc-sys windows_x86_64_gnullvm	libc windows_i686_gnu windows_i686_msvc v8 linux-raw-sys ring openssl-src windows_aarch64_msvc encoding_rs windows_x86_64_msvc

Ecosystem

Number of crates that have each of the alternatives in their dependencies. More popular doesn't mean better. These crates and categories were hand-picked.

Runtimes
tokio	async-std	pollster	smol
23221	1378	257	170

Web frameworks
tower	axum	actix-web	warp	rocket	poem	rouille	gotham
2250	1191	919	449	410	139	35	21

TLS clients
rustls	native-tls	openssl
3918	1756	1416

git clients
git2	gix
1179	126

Loggers
log	tracing	slog
44016	21281	489

Error handling
thiserror	anyhow	quick-error	eyre	snafu	miette
36685	22483	2964	1690	1139	901

Argument parsers
clap	getopts	pico-args	argh	argparse
21173	1017	339	277	107

Markdown parsers
pulldown-cmark	markdown	comrak
838	156	125

TOML parsers
toml	toml_edit	basic-toml
11817	6867	91

Binary encoders
bincode	prost	protobuf	rmp-serde	ciborium	capnp
6054	3376	1373	1295	485	115

JSON parsers
serde_json	json5	simd-json	miniserde	tinyjson
37882	219	114	24	14

Parser generators
nom	pest	combine	peg	pom	lalrpop
8004	3720	1677	404	98	25

XML parsers
xml-rs	quick-xml	xmlparser	xml5ever	libxml	rxml	elementtree
1806	1705	725	225	92	28	24

Temp files
tempfile	tempdir
6118	465

Rustc compatibility

Percentage of crates (in their current version) that can be compiled with a given Rust version. The data is based on sampling of cargo check and clippy::incompatible_msrv on Linux/aarch64. Excludes crates that never built (e.g. because they need nightly, or Windows, or unusual C dependencies).

These stats are best-case scenarios that assume use of a most-compatible Cargo.lock file. Fresh projects without a lockfile will be less compatible due to too-new transitive dependencies.

Compatibility weighed by crates' popularity is not a realistic representation of ecosystem-wide compatibility. Actual compatibility is always worse, because MSRV of projects is not an average of their dependencies MSRV, but entirely dependent on their least-compatible dependency.

All crates, including unmaintained ones

Rustc	OK / No data / Broken deps / Incompatible
1.82
1.81
1.80
1.79
1.78
1.77
1.76
1.75
1.74
1.73
1.72
1.71
1.70
1.69
1.68
1.67
1.66
1.65
1.64
1.63
1.62
1.61
1.60
1.56
1.55
1.50
1.45
1.40
1.35
1.31
1.30
1.25

4000 most recently updated crates

Rustc	OK / No data / Broken deps / Incompatible
1.82
1.81
1.80
1.79
1.78
1.77
1.76
1.75
1.74
1.73
1.72
1.71
1.70
1.69
1.68
1.67
1.66
1.65
1.64
1.63
1.62
1.61
1.60
1.56
1.55
1.50
1.45
1.40
1.35
1.31
1.30
1.25

Usage of Rust versions based on crates.io traffic

This is based on crates.io request log data from the last week. This is not limited to real users, and includes automated traffic like CI. 90% of requests were from stable (non-nightly) Rust versions. Less than 0.2% of requests came from Rust versions older than 1.63.

This many crates.io requests…	0%	3%	17%	69%	78%	84%	88%	90%	91%	94%	95%	96%	97%	99.3%	99.4%	99.7%	99.8%
…use this stable version of Rust or newer	1.84	1.83+	1.82+	1.81+	1.80+	1.79+	1.78+	1.77+	1.76+	1.75+	1.74+	1.72+	1.70+	1.67+	1.66+	1.65+	1.63+
This many crates.io requests…	3%	4%	5%	6%	9%	9%	10%
…use this or newer nightly version of Rust	1.84+	1.83+	1.82+	1.81+	1.80+	1.79+	1.78+

Lib.rs › Stats