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 171.6 million downloads in a single day, which is more than all downloads in the first 26 months since the release of Rust 1.0 in May 2015.

Traffic during weekdays is typically 2.9× higher than during weekends (up from 2.7× a year before).

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

There are 39,024 users or teams that have a crate on crates.io. The number of owners is growing at a rate of 1.3× per year.

Lib.rs has indexed 151804 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
27331	13803	13972	14515	11816	9457	7662	6653	5824	4905

10	11	≥12	≥14	≥16	≥18	≥20	≥25	≥30	≥40	≥60	≥80	≥100	≥120	≥150
3916	3629	5369	3893	2978	2173	3128	1699	1542	748	134	34	20	1	7
greader_api eva-rjrpc square-rust ignors libimagentrytimetrack	spinal rrpack-prime pyimports dntk gringron_pool	subwasmlib polkadot-node-core-chain-selection jup-ag-nova ewin datafusion-expr	ha-ndarray depploy nakamoto-client dynamodb-book-ch21-github evtx2bodyfile	audio-conv serv surgefx-dualdelay luks2 fmi-sim	libquassel galoy-cli qdk_sim_experimental ibkr_client_portal xc3_lib	twilight-gateway simple_serde ic_siws candle-core-temp sentry-contrib-native	morf-mqtt-bridge possum-db zinoma bard payjoin-cli	rvimage morsels_indexer tet-libp2p asimov urdf-viz	tet-core reductstore tower-async-http quaint-forked summa	agave-validator inexor-rgf-rt sqlx-core-guts shotover rattler-build	cachepot lurk miraland-core ockam_api subshell	nu-command mindustry-mod-v7 westend-runtime homestar-runtime deno	coreutils	homestar-workspace-hack apollo-router zero4rs uhg-custom-appollo-roouter forest-filecoin

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
20169	15063	8832	4628	1554	1405	868	418	172	109	79	90	25
retroqwest-derive keytar-sys okane-core caffe2op-transpose krust_gl	clock-bound-shm tree-sitter-haskell wasm4fun-sound ezno-parser m2-ctrl	kml eth_checksum etwin_scraper_tools gosh-model fluence-fork-libp2p-swarm	monero risc0-zkvm cyfs-base rp-pico cumulus-primitives-aura	femme pallet-xcm guppy gstreamer-app fltk	strfmt lopdf nu-protocol deflate piston-shaders_graphics2d walrus blstrs sc-chain-spec ccm amq-protocol	duct solana-udp-client pnet_base by_address tabled libp2p objc2-ui-kit objc2-cloud-kit anchor-derive-space twoway	send_wrapper core2 rgb lexical-core bevy_hierarchy actix-router gobject-sys outref rcgen sqlx	kv-log-macro cmake lru slotmap fallible-iterator sha-1 number_prefix language-tags hyper-rustls libsecp256k1	kernel32-sys fixedbitset tinytemplate plotters sct openssl-probe iovec rand_pcg criterion fuchsia-cprng	tokio-macros num-conv spin env_logger powerfmt pin-project-internal clap_derive unicode-xid deranged libredox	futures mio digest httparse core-foundation-sys socket2 generic-array winapi-util heck anyhow	libc autocfg windows_i686_msvc windows_i686_gnullvm log proc-macro2 itoa windows_x86_64_gnu unicode-ident serde_derive

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
44321	27747	9172	17912	11771	13780	7944	8392	2814	1356
vplugin-package google-service-account-oauth-jwt-assertion-cli video_ludo xmc4500-hal augment	launchthing graphy_module libgmtr strtoint phantom_newtype	err-ctx caffe2-serverquantize chime bevy_schedules_ext revolver	moscato cause apple-clis arthas ibkr_client_portal	rsolr spigot twitter_privacy adequate saros	webweg alloy-sol-macro rmesh librashader-runtime-d3d12 cl-traits-derive	q_compress minutiae benimator bolero-kani aws-sdk-m2	embassy-futures tor-cell tsunami embedded-display-controller decnumber-sys	packed_simd levenshtein loaded_dice ndless cue-sys	quoted_printable chrono-humanize data-encoding-bin serde_qs exempi-sys

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
15385	11184	14220	17857	28206	17917	14568	10368	10642	4862
mtracker url2audio xc3_lib cdumay_result pallet-assets-freezer	flagrant-client repvar nr noodles-refget resolver_api_derive	celsium cw20-base quickfix-msg-gen zusi-fahrpult biome_string_case	hcop pyimports keithley-2230-series anydate dynamodb-book-ch21-github	mmtickets-common constant_time_eq config-secret salph restbl	otter-nodejs-tests qdk_sim_experimental simple-view convert-enum depploy	rdftk_names witty-phrase-generator rs-docker epir aiid_js	sn0int-signal ploteria regularize-filename cfn-custom-resource pfly_rust	ethereumvm-network-foundation loopybayesnet quickjs-sys tracing-derive fts_gamemath	litelocale rust-dwm-status roadrunner nsq qt_generator

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
3831	5106	9175	15757	30175	21890	19195	14447	16129	9504
kmeans_smid egraphics-core blake2_ce openrank-block-builder cisness	ismp-parachain-runtime-api virtio-spec cyclonedx-bom-macros docxsidepdf fyrox-graph	pacmanager casper-contract-schema car-mirror-axum spq-as rsjsonnet-front	goap-ai pyimports everything-sdk tyrosine-common stostatus	dao-voting-native-staked ninja-files-coreutils gen-api-wrapper steel-repl chatgpt-functions	mktree efm32lg995-pac cpiotools pasta_rusta google-chat-types	aws-gamelift-server-sdk-rs epir benimator qdk_sim_experimental rate_limiter	sentry-contrib-native samesame ruler stcloud cfn-custom-resource	tracing-async errer ccl_stable_deref_trait tmdb_client overloadable	interleaved-ordered fast fujisaki_ringsig unic-ucd-age mxruntime

Number of releases per crate

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

1	2	≥4	≥8	≥16	≥32	≥50	≥100	≥500
46890	35796	28292	18264	9782	3159	2306	674	46
augment google-service-account-oauth-jwt-assertion-cli vplugin-package xmc4500-hal video_ludo	nu_plugin_tracer aws-gamelift-server-sdk-rs libgmtr launchthing patica	scottish_names mktree gnostr-get-relays zusi-fahrpult chipmunk-sys	xdr-rs-serialize-derive holder chromiumoxide_pdl gbnf valkyrie-qualifier	sim-rust angreal bhop mavspec rusty_ulid	tracing-awc rusty-leveldb holochain_trace reddit-search challenge_response	deno_config aws-sdk-vpclattice caisin wasmtime-wit-bindgen libp2p-tcp	wat piston2d-opengl_graphics re_log_encoding dua-cli wasmtime-cli	swc_ecma_codegen rustc-ap-rustc_errors rustc-ap-arena spider indy

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	≥1000
18644	6720	6938	5322	660	129	69	46	17	21	1
auser fd canadaduane kouky dgoodlad	Mange raggi paulstansifer deontologician marcoow	stefanoc joshuaclayton ebassi patrickt tuffy	xenoterracide thijsc madninja jedbrown daaku	ahl reu hysonglet jjl thanethomson JeremyRubin archer884 legoktm	Protryon vercel ihciah ubnt-intrepid franziskuskiefer tyleo esp-rs arcnmx	jeremyBanks kuviman fluencebot andygrove rerunio bbqsrc tauri-bot casey	rivy matklad aspect matthiasbeyer PistonDevelopers gengteng folex gridbugs	newpavlov Traverse-Research-CI-runner btwiuse mingyang91 al8n sunfishcode howardwu a-kenji-buildbot	sdroege Azure seam345 dtolnay RustCrypto kennykerr vkill kdy1

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	≤42MB
18874	52541	44451	6985	7668	1897	2957	606	31
x-wing wasmtime-async xmc4500-hal err-ctx augment	kaspa-alloc ethereumvm-network-foundation rcg cyclonedx-bom-macros mc-sgx-urts-sys	gruphst packing_codegen constant_time_eq hyperlocal-with-windows gbnf	lightning-invoice shortlang ssh-rs pinot bp-wallet	atsamv70j20b ya-relay-client solana-rpc rusty-leveldb snitch-protos	mpileup tree-sitter-ruby gaviota-sys zfp-sys rplexfmtr	librobotcontrol-sys bayespam luajit-src mcup guessing_game_1732891	soloud-sys fasttext seismicdb series-troxide detexify	mupdf-sys efm32wg-pac v8 efm32gg-pac ffmpeg4-sys

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
48194	25022	10869	4396	1383	401	56	17	6
phantom_newtype exdsdevs lunesweb	url2audio fil_actor_verifreg cyborgtime mtracker	cargo-bloat get-blessed cargo-run-wasm video_ludo rbx_xml	ostree-ext fetch-catnip druid punkt leaky-bucket egaku2d	libdav1d-sys parquet2 vegafusion-runtime bech32 stm32f3 shell-words bottom	deranged rocksdb gix rustls-pki-types static_assertions paperclip bincode diesel	snmalloc-sys unicode-width vcpkg clap rustls-webpki aws-sdk-s3 bzip2-sys h2 tracing-subscriber	windows_i686_gnu windows_i686_msvc libz-sys regex-automata winapi encoding_rs windows_x86_64_msvc librocksdb-sys tokio libsqlite3-sys	image windows linux-raw-sys libc ring windows-sys

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
20783	1382	214	164

Web frameworks
tower	axum	actix-web	warp	rocket	poem	rouille	gotham
1999	1050	845	424	383	129	34	21

TLS clients
rustls	native-tls	openssl
3685	1678	1340

git clients
git2	gix
1116	116

Loggers
log	tracing	slog
40640	18859	480

Error handling
thiserror	anyhow	quick-error	eyre	snafu	miette
33353	20640	2926	1459	1017	722

Argument parsers
clap	getopts	pico-args	argh	argparse
19676	961	304	257	101

Markdown parsers
pulldown-cmark	markdown	comrak
786	133	112

TOML parsers
toml	toml_edit	basic-toml
11008	6095	27

Binary encoders
bincode	prost	protobuf	rmp-serde	ciborium	capnp
5611	2637	1307	1157	335	109

JSON parsers
serde_json	json5	simd-json	miniserde	tinyjson
34989	208	83	24	12

Parser generators
nom	pest	combine	peg	pom	lalrpop
7296	3472	1578	328	94	25

XML parsers
xml-rs	quick-xml	xmlparser	xml5ever	libxml	rxml	elementtree
1754	1507	671	211	91	26	24

Temp files
tempfile	tempdir
5554	459

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
1.79
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
1.79
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 requests

This is based on preliminary request log data. This is not limited to real users, and includes automated traffic like CI.

This many crates.io requests…	0%	5%	48%	61%	76%	84%	89%	90.8%	91.5%	92.5%	94.2%	97.4%	97.7%	97.9%	98.9%	99.1%	99.5%
…use this stable version of Rust or newer	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+
This many crates.io requests…	4%	8%	10%	12%	12%	12%	12%	12%	13%	13%	13%	13%	13%	13%	13%	13%	13%
…use this or newer nightly version of Rust	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+

Lib.rs › Stats