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 2.0× per year.

crates.io has served 223.0 million downloads in a single day, which is more than all downloads in the first 29 months since the release of Rust 1.0 in May 2015.

Traffic during weekdays is typically 2.9× higher than during weekends (up from 2.8× a year before).

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

There are 42,712 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 163346 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
27252	14755	14965	15805	12866	10388	8509	7381	6417	5290

10	11	≥12	≥14	≥16	≥18	≥20	≥25	≥30	≥40	≥60	≥80	≥100	≥120	≥150
4319	4025	5898	4084	3559	2392	3531	1959	1734	856	171	49	21	2	7
ruuvitag-upload ic-stable-structures systemd_socket futures-enum mongodb-gridfs	arrow-digest cosmic-cli epsilonz tembo-telemetry fabric-system	parrot-network google-plus1 globescraper koth kcheck	oxidate tappet z_osmf bevy_remote speedrun-api	crows-wasm cargo-index-transit cipherstash-grpc-web-client linera-alloy-signer-ledger imag-link	cargo-upload lindera-dictionary mpstthree cueball-dns-resolver modio-logger-db	ugdb krata-ctl highnoon turn-server manas_repo_layers	gringron_api terra-rust-api async-acme flowrs-tui juniper_puff	wasmut coyote tf-demo-parser presenterm i-slint-renderer-skia	hc-wasmer tmkms ssstar drogue-bazaar lamellar	bitomc northstar-runtime golem-cloud-cli sp1-core ibc-relayer	serde_dynamo miraland-runtime hipcheck surrealdb-sql pingap	nu-command staging-kusama-runtime lingua mindustry-mod-v7 polkadot-service	coreutils zawk	homestar-workspace-hack zero4rs forest-filecoin zigbee2mqtt-types uhg-custom-appollo-roouter

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
21872	16530	9615	5111	1730	1564	923	444	182	123	82	119	28
grex qm-role-build cmsis_dsp_sys_pregenerated google-consumersurveys2 notion-async-api	bison-http shine-stdext gtk-test log-tracing-layer sql_tool_core	geo-booleanop geometry_msgs near-vm-vm near-contract-standards ewe_trace	handlebars_misc_helpers fibers_global ratelimit zookeeper u-siem	codspeed-criterion-compat eui48 re_types utoipa-swagger-ui femme	tokenizers miniquad move-deps redb uname configparser color-backtrace jsonpath_lib ndarray-linalg nu-utils	actix-testing if-watch tokio-openssl jsonrpsee open-fastrlp-derive gcd planus dary_heap is-wsl gix-trace	x11rb-protocol impl-serde quinn-proto color-eyre wayland-protocols chacha20poly1305 pyo3-build-config servo_arc inventory memmap	float-cmp termtree phf_macros predicates-core matrixmultiply tungstenite xattr codespan-reporting precomputed-hash signal-hook	parking ucd-trie kernel32-sys phf polling der rdrand futures-executor windows-strings iovec	tracing-subscriber redox_users num-rational flate2 tinyvec_macros termcolor bytemuck pin-project-internal env_logger thread_local	rustix hyper cpufeatures crypto-common unicode-width httparse zerocopy-derive http mime pkg-config	windows-sys windows_aarch64_msvc num-traits bitflags windows_x86_64_gnullvm smallvec itoa windows_i686_gnullvm syn windows_i686_gnu

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	≤10 years
45991	30145	10185	19287	13055	14983	8606	9161	3188	1632	2
ya yesqlr oxidate blackjack_commons boing-internals	static-self-derive console-codes epsilonz group-varint-offset-encoding cargo-vistree	af_path impc nasoone-lib packtool caffe2op-enforce	qst steel-engine ooproxy clap-utilities docufort	flowcrafter portman_client resources genesis-impl copo	num-digitize range_bounds_map signature_bls ops oxidux	atsam4n16b-pac libusbk-sys workflow-rpc keebrs oml-game	ms3d tuplex pause_console gd32f1x0-hal nodrop-union	vec_map rio_turtle ghost histo cargo-hack	chrono-humanize fletcher google-dfareporting2d8 block-utils base64-serde	capnpc flate2

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	≤10 years
18197	11381	12971	20010	29737	19715	14805	11385	12008	5985	41
tergo-tokenizer ic-stable-structures pyo3-object_store mustafa_art swc_ecma_compat_es2015	tree-sitter-ursa v4-proto-rs-temp edrv-l3g4200d native-pkcs11 arrow-digest	gin-tonic docufort rflow nanoserde hdp-cli	text_maid impc screencapturekit cargo-gc-bin peon	autoken-rustc ambient_pipeline_types cargo-vistree id_factory progpool	clmm-cli clap-utilities pyportus group-varint-offset-encoding cat-loggr	qmc javavm cfx-types consul-rs-plus repl_framework	timbre usgs-espa-client mermaid-wasmbind c-closures-build supreme	libcalc sumlibrary hypermud ln azurlane	css lolapi gmagick vmx-just-a-test-001-maincrate libblockchain	epsilonz free typekit this-should-be-deleted rung_vm

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	≤10 years
4478	5228	9045	17153	31703	23762	19344	16128	18004	11077	313
borrow boxed_error flowrs-tui VulkanLoaderRust isr-core	v4-proto-rs-temp pswatch stac-duckdb docid kur	cap_access stara googleapis-tonic-google-maps-unity bevy_blendy_cameras bogdan_hello_macro	synthetic spawn64 xwt-anchor moq-native flakery-client	basejmp fplus-cli kcheck partiql-ast-passes busstop	noosphere-cli air-script mwa_hyperdrive lapce-xi-rope smallerpdf	degauss cayenne time-humanize deno_bindgen_macro uvm_cli	rustpat wat-ast slyce animation prs	rustorm-cli imager hypermud wallet-app arg-derive	rshader vmx-just-a-test-001-maincrate doug idem nakacli	epsilonz free xsv iobuf portaudio

Number of releases per crate

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

1	2	≥4	≥8	≥16	≥32	≥50	≥100	≥500
48775	38626	30751	20454	10611	3598	2557	812	51
boing-internals ya yesqlr blackjack_commons fbnc	stara epsilonz group-varint-offset-encoding systemd_socket static-self-derive	stopwatch physfs-rs tower-sessions-surrealdb-store rustcord-sys tembo-telemetry	git_mob rsocket_rust_transport_tcp reddit-fs tempfile-istream threescalers	dingtalk-rs parrot-network micro_ndarray mpstthree josekit	arrow-digest shuttle-next rust_icu_udat nanoserde sass-sys	inferno aws-sdk-trustedadvisor elastic_types rasn-mib cargo-audit	oculante aws-sdk-dynamodb pijul pax-cli simd-json	rustc-ap-rustc_cratesio_shim rustc-ap-syntax_pos rustc-ap-rustc_data_structures rustc-ap-syntax oni-comb-parser-rs

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
20419	7344	7588	5850	726	158	75	54	17	24
dgoodlad nakajima kouky ernesto-jimenez shanesveller	agemocui michaelmelanson robey raggi deontologician	zacbrown ratmice auser bjc oleganza	cablehead gnosek mpalmer vyfor srid	RandyMcMillan cloudflare yvan-sraka archer884 omarabid drmingdrmer rklaehn labra	ubnt-intrepid LPGhatguy jdonszelmann rust-embedded kvinwang FredrikNoren vercel tyleo	AbstractSDK zicklag zippy wasmcloud-automation casey sudo-shashank Xuanwo jeremyBanks	yayanyang boozook folex valff rust-lang madsmtm gridbugs uutils	tony-iqlusion strake miralandlabs matthewkmayer kayabaNerve sunfishcode mingyang91 cart	aws-sdk-rust-ci benesch Azure vkill heaths paritytech newpavlov awslabs

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
20270	61968	50731	8054	8793	2254	3434	697	34
zenoh-backend-sql ipkv sekai resx cnidarium	optional_take stara group-varint-offset-encoding setwallpaper cwe-api	tappet arrow-digest standalone-quote emap ffmpeg-sys	frame-system cross-socket rusty_express threescalers lares	sidh spark-connect-rs gaal marseille mysql_async	centerline ttf-noto-sans dayendar poro quilkin	tauri-app-vue-example molar_powersasa telraam-rs zinzen libnet-sys	my_tools rs1090 elfkit elikar_egui mwa_hyperdrive	ffmpeg4-sys wandio-sys kube-custom-resources-rs occt-sys musix

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
55310	27856	12493	5057	1591	522	66	12	15
kcheck ruuvitag-upload vbscript	ingest apollo-hyper-libretro-core-beetle-wswan speedrun-api moq-native	hwlocality-sys cf async_zmq poly-mesher google-displayvideo1	terminal3d file-format actix-form-data wasmtime-winch langchain-rust chemfiles	openblas-provider mathcat cosmian_findex write16 slog-term libp2p parity-scale-codec-derive	gtk concurrent-queue objc2 lindera-ipadic ciborium objc2-foundation fnv hex	serde tracing-subscriber mio rayon tokio-util cc time nom http-types	windows_x86_64_gnullvm regex-automata librocksdb-sys syn winapi aws-lc-sys tokio encoding_rs windows_aarch64_gnullvm regex-syntax	windows windows-sys libsqlite3-sys ring windows_aarch64_msvc winapi-x86_64-pc-windows-gnu windows_x86_64_gnu windows_x86_64_msvc linux-raw-sys windows_i686_gnu

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
23869	1410	257	171

Web frameworks
tower	axum	actix-web	warp	rocket	poem	rouille	gotham
2351	1239	931	457	416	142	36	21

TLS clients
rustls	native-tls	openssl
4017	1783	1432

git clients
git2	gix
1207	127

Loggers
log	tracing	slog
44934	21973	493

Error handling
thiserror	anyhow	quick-error	eyre	snafu	miette
37819	23139	2989	1740	1184	918

Argument parsers
clap	getopts	pico-args	argh	argparse
21578	1033	349	284	108

Markdown parsers
pulldown-cmark	markdown	comrak
852	161	131

TOML parsers
toml	toml_edit	basic-toml
12109	7110	94

Binary encoders
bincode	prost	protobuf	rmp-serde	ciborium	capnp
6162	3498	1387	1336	519	117

JSON parsers
serde_json	json5	simd-json	miniserde	tinyjson
38747	226	131	24	14

Parser generators
nom	pest	combine	peg	pom	lalrpop
8209	3848	1722	431	102	25

XML parsers
xml-rs	quick-xml	xmlparser	xml5ever	libxml	rxml	elementtree
1815	1742	731	228	92	28	24

Temp files
tempfile	tempdir
6295	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. 86% of requests were from stable (non-nightly) Rust versions. Less than 0.22% of requests came from Rust versions older than 1.63.

This many crates.io requests…	0%	5%	43%	68%	76%	86%	88%	90%	92%	95%	96%	98%	99.2%	99.3%	99.6%	99.7%
…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+	1.73+	1.70+	1.67+	1.66+	1.65+	1.63+
This many crates.io requests…	4%	5%	6%	7%	13%	13%	13%	13%	14%
…use this or newer nightly version of Rust	1.84+	1.83+	1.82+	1.81+	1.80+	1.79+	1.78+	1.77+	1.76+

Lib.rs › Stats