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 2.3× per year.

crates.io has served 941.4 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 61,881 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 251461 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
34790	19318	19978	22958	18838	15977	13966	12033	10761	9195

10	11	≥12	≥14	≥16	≥18	≥20	≥25	≥30	≥40	≥60	≥80	≥100	≥120	≥150
7818	7202	11314	8233	6652	4779	8003	4363	3998	2166	444	126	57	16	10
safe_crypto fox-dotfile twstock ars-server immortal-http	azure_mgmt_deploymentmanager noem tray-item piko-session rsreddit	google-firebasedynamiclinks1 bevy-atlas-loader supasim-kernels volcengine runtara-protocol	zeph-sanitizer well docsearch enprot longcallR	kitmap crcnt_rbac sudoku_machine vegravis maplibre_native	nym-credentials cmw xs-http phonenumber-fixed toon-lsp	rusqlite-ic krokiet plit-gw ant-service-management dreamwell-runtime	saorsa-mls woofmt tanu-tui synwire-agent lindera-dictionary	gst-plugin-aws meerkat-mob launchdarkly-server-sdk shadowquic livetrace	tfrecord aws-smithy-http-client steady_state koru-delta storage-proofs-porep	malwaredb-server greentic-runner-host numrs2 primp-reqwest agentd	solidb maturin langchain-ai-rust gloamy trailbase	solana-rpc kreuzberg aster-core pezkuwi-service plotnik-macros	asset-hub-westend-runtime servo-script pmat vrl deno	forest-filecoin solana-core apollo-router pezkuwi-sdk polkadot-sdk

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
35322	29388	16509	7771	2695	2449	1452	652	304	202	119	122	124
regex-charclass cuddle-please-commands emutil velodyne-lidar occlum-sgx	krusty-kms-sdk fern-proxy-interfaces vmix-core pingap-otel miniconf_mqtt	agent-kit rpdfium-parser chksum bmux_terminal nove_tensor	nexcore-chrono sardonyx_error hxrts-aura-journal solana-clap-v3-utils bids-layout	packet-dissector-core neo4rs embassy-net bluer rx_core_operator_composite	ntest rusty-hook smart-leds ffmpeg-next boring azure_identity crates_io_api libsql zenoh vil_connector_macros	aok cosmwasm-core enr p3-util cssparser-color google-cloud-auth libtest-mimic jsonrpsee-server puffin wasmi_collections	is-docker spl-pod accesskit_macos qualifier_attr async-net pulley-macros solana-keccak-hasher xmlwriter multihash-derive gdk-sys	serial_test_derive base64-simd mac byte-tools unicode_categories serial_test version-compare atomic send_wrapper pem-rfc7468	tonic hybrid-array iovec futures-macro block const_format_proc_macros core-graphics const_format atoi phf_codegen	bindgen keccak backtrace futures-executor convert_case block-buffer clang-sys petgraph is-terminal bytemuck_derive	winnow darling_core pin-project-internal windows-implement windows-interface half darling thread_local hmac tinyvec_macros	zerocopy-derive potential_utf futures-io icu_provider icu_properties generic-array zerovec-derive itertools icu_locale_core ryu

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
71810	51957	18178	29260	18187	21002	11747	12365	5376	2610	503
cmw insectbox anvil-liquid-derive openvm-rv32-adapters dreamwell-runtime	simple-digraph modifier_macro mind_sdk_lb zsync tremor	zigbee2mqtt_types_vendor_zen yazi-shim poeledger-economy-data jiminy avin_utils	beleth npsimd wirewhale easy-jsonrpc-mw bs62	nintendo-lz mpdclient-sys adaptive-card-rs jamtop dedupefs	google-cloud-websecurityscanner-v1 bevy_flair_style argentum_rest_infrastructure hass-entity-state rusty_analytics	serde_json5 combination tfhe-cuda-backend canbench-rs certreplace	pi_slotmap_tree serde_magnus netgauze-bgp-pkt tectonic_bridge_harfbuzz applesauce	koto_json matchit wgpu-profiler simplerand rust-releases	fallible-iterator autocfg streaming_algorithms dilithium kas-macros	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
42729	23758	19792	25218	34559	27192	21481	14590	21109	10996	1571
pipenet libpetri-verification agentgif dreamwell-runtime nanodns	solana-short-vec partiql-catalog cranko gpuburden missiond-core	git-snow data-nasdaq fyi-core gifclip veilocity-prover	dissect sub-registrar aws_utils_firehose diesel-timescaledb clock-bound-shm	maelstrom-broker serde_json5 swamp-game tiberius_db_tester chessnut	local-type-alias subcryptor papa gtfs-rt memcrab-cache	salat_mv qemu-system-ppc64 bae2 cubism param_builder	memedsn kronos wordletron spv-rs markup5ever_arcdom	mi async_destruction siwa step-dir wrap_result	susy-jsonrpc-macros count_cache cargo-debug cargo-feature-analyst sparx	file_diff split_aud koukku google-datastore1_beta2 pwat

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
19387	17269	16759	22526	36513	31765	26800	19716	30106	18238	3916
agentgif dreamwell-runtime nanodns ai-time-core mg24-hal	unitforge_macros specl-tla verushash-rs bevy_woff gpuburden	claude-code-status-line yazi-shim fyi-core tinycbor-derive atlas-account-view	nesting sub-registrar scalop kotoba-cid reqsign-tencent-cos	mpdclient-sys thrashe serde_ssml api_req write_mode	glowdust wrpc-transport-derive-macro scopegraphs-regular-expressions atomic-bomb-engine rstrpc-macros	re_build_build_info netgauze-bgp-pkt lp-types shuttle-axum authzen-diesel-proc-macros	whereis pi_slotmap_tree polyresolver navigator pluser	cartesian etwin_dinoparc_client forktree rust-blockchain keywords	courgette smd_tests convute dfrs hash2hwaddr	split_aud pwat tdengine omg thread_local

Number of releases per crate

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

1	2	≥4	≥8	≥16	≥32	≥50	≥100	≥500
75467	58888	47068	31908	17699	5844	4093	1947	81
dreamwell-runtime cmw insectbox anvil-liquid-derive openvm-rv32-adapters	packler mind_sdk_lb tremor unc-abi-client-impl rocket_anyhow	clock-bound-shm certo send_cells krokiet bsor	zeph-sanitizer koto_geometry plex-api approx_eq daemon_console_lite	shticker_book_unwritten tnj-tui datafusion-datasource-json orn butane	wasmtime-internal-jit-icache-coherence pgbatis hyperi-rustlib proc-macro-error testtrim	hyperstack-macros dioxus-core sc-rpc-spec-v2 shuttle-axum sqlx-rt-oldapi	opendeviationbar-client mycelium-adapters-shared-lib dep-obj zng-wgt-webrender-debug re_view_spatial	solana-merkle-tree solana-measure solana-perf solana-sdk solana-rayon-threadlimit

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
29282	10590	10871	8943	1145	292	119	90	42	50	2
macournoyer knzconnor canadaduane mdub fd	osteele jaikoo jvantuyl raggi vic	lancecarlson joshuaclayton nakajima JackDanger peters	kolektiv brandonweeks madninja romanz jedbrown	jeluard upsuper ehuss oxidizer-crates-io-bot jpschorr navicore algesten arighi	arcnmx dylanmckay forecast-bio soywod ubugeeei MavenRain kardeiz 197g	snnsnn MOZGIII noamteyssier raviqqe bmbper Michael-F-Bryan bradleystachurski astraw	nymtech nearprotocol-ci boozook rivy nym21 doitian danielhenrymantilla matthiasbeyer	artifact-byted swc-bot greentic-ai wasmerio refcell PsichiX miralandlabs Dirbaio	noahgift googleapis mingyang91 mattsse dtolnay piot Wandalen dbolduc

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
24004	76392	93863	19319	18297	3966	5925	1190	39
pbbot modifier_macro hello_macro openvm-rv32-adapters umbrae-dlmm-sdk	nesting yesqlr rename unc-abi-client-impl rusqlite-struct-derive	todoist-rs minigrep_tupelo gearhash affinidi-vc gpwg	broomva npsimd matter-js-rs srx-rs nanodns	quizler vaultic scalop amtrack_rs brk_rolldown_common	deribit-http rsfdisk kn-cuda-eval clausen curve25519-dalek-fiat	google-material-design-icons-bin openapitor easy-alias hgrep trenchcoat	mpeg2ps lazytask fundoc image_ascii rubullet-sys	gdal-src efm32gg-pac ffmpeg4-sys efm32gg12b-pac re_web_viewer_server

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
47264	22897	11181	5879	2924	1294	275	40	43
spitfire cmw runtara-protocol	llkv-executor acir_field codex-runtime beleth	gear-wasm-instrument aws-sdk-workspaces rs162 bounded-static-derive surrealml-core	unicycle par-core hexfloat2 p3-commit s390_pv feruca	recvmsg msi tokio_wasi fastrace-axum serde_json5 antlr4rust dicom-parser	uint captcha starlark_syntax rfd dirs-sys-next encoding-index-simpchinese eventsource-client virtue	lingua opentelemetry webpki-root-certs moxcms git2 redox_syscall const-oid lingua-czech-language-model objc2-core-foundation	tracing-subscriber base64 sha3 futures-util reqwest hyper bstr idna cc chrono-tz	tracing regex-syntax aws-lc-fips-sys encoding_rs zstd-sys windows_aarch64_gnullvm winapi k8s-openapi brotli rustix

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
50084	1593	589	340

Web frameworks
tower	axum	actix-web	rocket	warp	poem	rouille	gotham
7524	4735	1331	599	574	162	49	20

TLS clients
rustls	native-tls	openssl
7772	2573	1915

git clients
git2	gix
2142	338

Loggers
log	tracing	slog
73974	47287	542

Error handling
thiserror	anyhow	quick-error	eyre	snafu	miette
83202	46550	3528	3238	2123	2003

Argument parsers
clap	getopts	pico-args	argh	argparse
37817	1745	884	424	121

Markdown parsers
pulldown-cmark	comrak	markdown
1729	415	306

TOML parsers
toml	toml_edit	basic-toml
24654	13146	235

Binary encoders
bincode	prost	rmp-serde	protobuf	ciborium	capnp
10639	6974	2936	1852	1559	185

JSON parsers
serde_json	json5	simd-json	miniserde	tinyjson
78769	1218	545	71	29

Parser generators
nom	pest	combine	peg	pom	lalrpop
13928	7125	2673	899	275	25

XML parsers
quick-xml	xml-rs	xmlparser	xml5ever	libxml	rxml	elementtree
3943	2191	1373	478	99	32	24

Temp files
tempfile	tempdir
12547	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
1.94
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
1.94
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. 91% of requests were from stable (non-nightly) Rust versions. Less than 0.19% of requests came from Rust versions older than 1.59.

This many crates.io requests…	0%	4%	37%	50%	61%	67%	72%	74%	77%	82%	86%	87%	89%	98%	99%	99.1%	99.3%	99.5%	99.6%	99.8%
…use this stable version of Rust or newer	1.96	1.95+	1.94+	1.93+	1.92+	1.91+	1.90+	1.89+	1.88+	1.86+	1.85+	1.84+	1.81+	1.75+	1.70+	1.68+	1.67+	1.65+	1.62+	1.59+
This many crates.io requests…	3%	4%	4%	7%	7%	7%	7%	7%	8%	8%	8%	8%	8%	8%	9%
…use this or newer nightly version of Rust	1.96+	1.95+	1.94+	1.93+	1.92+	1.91+	1.90+	1.89+	1.88+	1.86+	1.85+	1.84+	1.81+	1.75+	1.70+

Lib.rs › Stats