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 2.4× per year.

crates.io has served 944.9 million downloads in a single day, which is more than all downloads in the first 47 months since the release of Rust 1.0 in May 2015.

Traffic during weekdays is typically 2.5× higher than during weekends (down from 3.0× a year before).

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

There are 63,067 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 259008 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
35383	19705	20499	23537	19394	16471	14430	12470	11178	9551

10	11	≥12	≥14	≥16	≥18	≥20	≥25	≥30	≥40	≥60	≥80	≥100	≥120	≥150
8093	7491	11770	8613	6957	5028	8381	4527	4184	2263	478	131	57	19	10
safe_crypto awsim-s3 ars-server twstock fox-dotfile	rsreddit piko-session tray-item noem azure_mgmt_deploymentmanager	zpowergraph insight-line taproot-assets-zk-verifier aws-auth-payload supasim-kernels	fallow-extract haagenti-streaming longcallR well certo	google-cloud-asset-v1 sudoku_machine vegravis raclettui maplibre_native	sp-crypto-ec-utils xs-http nym-credentials there-i-fixed-it rona	ink_env langfuse-core miden-debug-engine rusqlite-ic octoroute	saorsa-mls lindera-dictionary licenz-core linear-cli typewire	api_openai livetrace lumesh josh-core meerkat-mob	jbuild linera-exporter smpl-core steady_state aster-server	massive_game_server_core prest malwaredb-server embystream reqwest	langchain-ai-rust rivven-connect veritas-nexus apple-codesign oximedia-cli	pezkuwi-service liboxen oximedia pallet-staking-async-parachain-runtime lumis	asset-hub-westend-runtime kodegen_candle_agent coreutils zero4rs servo-script	solana-core apollo-router uhg-custom-appollo-roouter polkadot-sdk gnostr

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
36765	30692	17290	8028	2743	2463	1480	680	319	195	128	119	132
cuddle-please-commands cyphr-storage velodyne-lidar shared_hashmap tomcrypt-sys	thisslime-core safe_app cargo-diet asterisk-rs-core pavex_miette	ratex-parser lvqr-ingest qcheck-macros tsz-parser tracing-human-layer	dpdk-sys gettext zebra-chain unc-primitives tet-libp2p-core	resize turso pezcumulus-primitives-core slint-build limnus-local-resource	ckb-hash versions crates_io_api signal-hook-tokio boring esp-metadata-generated hyper-openssl pezsc-client-api vmm-sys-util miden-core	ethers-addressbook oxc_diagnostics target-features hyperloglogplus oxc_syntax tree-sitter-ruby http-serde luajit-src polars-dtype p3-dft	blowfish spl-type-length-value keyboard-types rayon-cond spl-discriminator-syn spl-token-metadata-interface caps alloy-sol-macro-expander solana-blake3-hasher curl	ctrlc xkbcommon-dl cssparser-macros hyper-tls snafu byte-tools futf lexical-util wayland-scanner atomic	rdrand atoi libz-sys critical-section kernel32-sys winapi-build new_debug_unreachable core-graphics iovec fuchsia-cprng	jni-sys jni-sys-macros instant bytemuck_derive memmap2 futures-executor keccak block-buffer console lru	num-bigint flate2 redox_users tinyvec_macros tracing-log winnow iri-string windows-implement h2 portable-atomic	digest itertools generic-array winapi-util ryu socket2 chrono winapi-x86_64-pc-windows-gnu icu_normalizer rustix

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	≤11 years
74171	53561	19317	30917	18431	21169	11890	12539	5445	2655	525
dreamwell-runtime cmw openvm-rv32-adapters anvil-liquid-derive insectbox	tremor simple-digraph modifier_macro mind_sdk_lb zsync	vpb runtara-protocol zigbee2mqtt_types_vendor_zen jiminy yazi-shim	unitforge_macros smol-macros daemon_console_lite rustdoc-json-stable libpetri-verification	object-rainbow-json signal-gen-cjds66-lib oceanpkg engula colorconv	hass-entity-state marlin-verilog bevy_flair_style rhaki-cw-plus quaso	storm-config url-parse qm-s3 zng-wgt-webrender-debug rooting-forms	criterion-macro pi_slotmap pi_slotmap_tree regecs-codegen sc-consensus-beefy-rpc	chalk-recursive koto_json deadpool-postgres debugless-unwrap mio-pidfd	ego sha2-asm tari_core io-enum stm32l0	libloading crowbook blip_buf fern djangohashers

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	≤11 years
44331	25301	22517	25564	34820	27231	21914	14614	21466	11213	1649
sp-crypto-ec-utils aws-smithy-http-client-reqwest http-field vello_sparse_shaders logicpearl-build	elegans taproot-assets-zk-verifier raclettui mpl-agent-reputation certo	zinit_server humble-cli dotnet-lens rustler_logger_macro paginator-utils	unen_logging plex-api shift unleash-edge-edge-api safehold	otlp-stdout-client maelstrom-broker aum-core write_mode antlr-runtime-sys	wecom-agent tray-item wrpc-transport-derive-macro fufu flagged	schema-derive associative_positional_list libcli-rs packler tokio-io-utility	polyrhythm gxrfetch proc-lock-api bitrange ruquotes	amiya pic2lcd gig-cli fcp_cryptoauth wrap_result	seinbot-rs meander spectacles-rest osaka-macros dinner	wesley pabst tungsten feaders quale

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	≤11 years
19933	20284	18431	22865	36968	31887	27362	19748	30545	18528	4069
egui_component_style_macros devsper-bus only-lsp affinidi-vc lmntalc-core	elegans taproot-assets-zk-verifier jwtea rho-server perch	runtara-protocol rsxtk fyi-core rustler_logger_macro ribir-bot	kaniop-group prism3-config expr-solver-bin sxurl unleash-edge-edge-api	kcr_operator_authorino_kuadrant_io insight-line kcr_dataprotection_kubeblocks_io api_req libhans	zng-wgt-webrender-debug icao-wgs84 wintab_lite shifty scopegraphs-regular-expressions	structfromdir clp-src ndarray-slice sbat mikktspace-sys	noble-did heterob logisheets_base irv-traits usiagent	glslt_cli raui-tesselate-renderer poirebot-lichess unftp-auth-pam noble-staking	pincli sophon-types-serialize ruuvitag-upload hunspell-sys susydev-jsonrpc-pubsub	wesley pabst luminance-gl arraymap pcb

Number of releases per crate

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

1	2	≥4	≥8	≥16	≥32	≥50	≥100	≥500
77891	60630	48367	33016	18299	6066	4218	2045	88
insectbox anvil-liquid-derive cmw dreamwell-runtime openvm-rv32-adapters	rocket_anyhow unc-abi-client-impl modifier_macro tremor packler	bsor libmseed-sys certo local-type-alias pcf857x-simple	plex-api safe_crypto wukong teacat_lib compio-quic	butane strict_encoding_test orn cyclonedds-rs swc_experimental_ecma_ast_compat	oidc-cli arcis-interpreter proc-macro-error grove-rs arysn	flowcore huawei-cloud-api-definitions-RabbitMQ sqlx-ledger cranko arti	markdown-tui-explorer bacon re_span mycelium-key-value wasmtime-types	solana-sdk icydb-primitives sn_testnet solana-faucet rustc-ap-arena

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
29746	10758	11090	9211	1187	308	123	89	47	51	2
corasaurus-hex fd canadaduane dgoodlad macournoyer	osteele raggi michaelmelanson mountain vic	oleganza muness mikea Abica paulstansifer	levicook mazdak lsegal kolektiv shift	apache jjl l1x devrandom community-stevedores-org birkenfeld dherman navicore	nightness brayniac kardeiz Nugine arcnmx h00gs appcypher soywod	losfair foresterre franziskuskiefer rvolosatovs rise0chen matklad fluencebot nikomatsakis	denobot doitian dfinity DanielleHuisman elsirion bmwill gengteng dfinity-publish	therustmonk mosure artifact-byted wasmerio RickWinter drzln Dirbaio tony-iqlusion	simlay cloud-sdk-rust-bot mammothbane mingyang91 aptos-crates googleapis eugenehp mattsse

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	≤38MB
24248	77744	97465	20392	19271	4128	6110	1223	39
modifier_macro zigbee2mqtt_types_vendor_zen simple-digraph umbrae-dlmm-sdk megabytes	nesting rusqlite-struct-derive easy_rdev_key jams-proto edrv-ltr390uv	smol-macros crcnt_rbac teacat_lib devsper-bus seqc	broomva sapter flowcore rust-corosync npsimd	brk_rolldown_common ghostflow woofmt rsjsonnet-lang html5gum	rsfdisk mantaray asciit tui-pantry curve25519-dalek-fiat	system-theme R413D08 google-fonts-glyphsets libsui ch58x-hal	icu_experimental_data rustimate-assets loki-ai mdriver stm32f7-staging	sniffnet stm32-metapac re_web_viewer_server bpe-tokenizer jni-android-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
43852	21712	11119	5976	2948	1269	273	43	43
octoroute clock-bound-shm squawk-lexer	compactrs arithmetic-parser nodedb send_cells	surrealml-core servo-webgl maplibre_native era_cudart arborium-ada	former allms ftui-render loco-gen turso_macros mpeg4-audio-const	keccak-asm geoarrow-array launchdarkly-server-sdk sdl3-sys harper-thesaurus buffa ethers-contract-abigen	utf16_iter bytecount critical-section datafusion-physical-optimizer sliceslice encoding-index-simpchinese gix-features is-terminal	khronos_api rkyv libwebp-sys webpki-root-certs ndk-sys rust_decimal moxcms farmhash spm_precompiled	vcpkg memchr webview2-com-sys icu_properties_data h2 indexmap http aws-sdk-s3 tracing-subscriber chrono-tz	pyo3 syn prost-build k8s-openapi rustix web-sys secp256k1-sys v8 itertools zstd-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
52492	1594	639	348

Web frameworks
tower	axum	actix-web	rocket	warp	poem	rouille	gotham
8065	5156	1340	599	577	162	50	20

TLS clients
rustls	native-tls	openssl
8202	2615	1955

git clients
git2	gix
2218	358

Loggers
log	tracing	slog
76500	49951	542

Error handling
thiserror	anyhow	quick-error	eyre	snafu	miette
87593	48588	3623	3321	2184	2099

Argument parsers
clap	getopts	pico-args	argh	argparse
39116	1852	926	430	122

Markdown parsers
pulldown-cmark	comrak	markdown
1856	442	336

TOML parsers
toml	toml_edit	basic-toml
25840	13497	253

Binary encoders
bincode	prost	rmp-serde	protobuf	ciborium	capnp
10856	7263	3026	1920	1669	184

JSON parsers
serde_json	json5	simd-json	miniserde	tinyjson
82834	1238	574	72	29

Parser generators
nom	pest	combine	peg	pom	lalrpop
14383	7317	2718	899	291	25

XML parsers
quick-xml	xml-rs	xmlparser	xml5ever	libxml	rxml	elementtree
4246	2219	1412	514	100	32	25

Temp files
tempfile	tempdir
13108	522

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
1.95
1.94
1.93
1.92
1.91
1.90
1.89
1.88
1.87
1.86
1.85
1.84
1.83
1.82
1.81
1.80
1.75
1.70
1.65
1.60
1.56
1.55
1.50
1.45
1.40
1.35
1.31
1.30

4000 most recently updated crates

Rustc	OK / No data / Broken deps / Incompatible
1.95
1.94
1.93
1.92
1.91
1.90
1.89
1.88
1.87
1.86
1.85
1.84
1.83
1.82
1.81
1.80
1.75
1.70
1.65
1.60
1.56
1.55
1.50
1.45
1.40
1.35
1.31
1.30

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. 92% of requests were from stable (non-nightly) Rust versions. Less than 0.19% of requests came from Rust versions older than 1.60.

This many crates.io requests…	0%	2%	28%	40%	51%	60%	67%	71%	73%	75%	82%	84%	86%	87%	88%	98%	99.1%	99.4%	99.5%	99.6%	99.8%
…use this stable version of Rust or newer	1.97	1.96+	1.95+	1.94+	1.93+	1.92+	1.91+	1.90+	1.89+	1.88+	1.86+	1.85+	1.84+	1.82+	1.80+	1.75+	1.70+	1.69+	1.66+	1.64+	1.60+
This many crates.io requests…	2%	3%	4%	4%	6%	7%	7%	7%	7%	7%	7%	7%	7%	7%	7%	8%
…use this or newer nightly version of Rust	1.97+	1.96+	1.95+	1.94+	1.93+	1.92+	1.91+	1.90+	1.89+	1.88+	1.86+	1.85+	1.84+	1.82+	1.80+	1.75+

Lib.rs › Stats