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 250.4 million downloads in a single day, which is more than all downloads in the first 31 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 44,105 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 168778 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
27877	15186	15358	16345	13290	10769	8843	7643	6662	5501

10	11	≥12	≥14	≥16	≥18	≥20	≥25	≥30	≥40	≥60	≥80	≥100	≥120	≥150
4470	4180	6132	4283	3715	2497	3710	2057	1794	907	190	52	22	4	7
futures-enum ruuvitag-upload mongodb-gridfs pubky-app-specs systemd_socket	fabric-system tembo-telemetry cosmic-cli arrow-digest epsilonz	archid-marketplace filewatch parrot-network globescraper koth	tappet easy-qjs oxidate linkcheck2 z_osmf	deployment-changelog rrdnsd cipherstash-grpc-web-client crows-wasm linera-alloy-signer-ledger	hmip721 cueball-dns-resolver modio-logger-db lindera-dictionary turn	entropy-client krata-ctl freya-hooks gix-testtools swc_ecma_compat_es2015	fpd voxelize scl-core dummyhttp emuman	pallet-contracts-mock-network tulpje-handler ambient_model_import tf-demo-parser wasmut	cairo-vm linera-base obfs4 axiom-eth rama	northstar-runtime hyperlight-host stm32f4xx-hal sigstore spider	deno_cli_lib_windmill opendal_obs hipcheck soroban-cli bjsmiley-surrealdb	staging-kusama-runtime tina-core deno_tauri surrealdb-core-nightly mise	zawk coreutils deno deno_lib	zigbee2mqtt-types uhg-custom-appollo-roouter forest-filecoin homestar-workspace-hack apollo-router

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
22650	17233	9903	5268	1807	1584	1006	442	190	136	81	122	29
cmsis_dsp_sys_pregenerated rhq-core google-consumersurveys2 edge-nal-embassy simplexpr	eternaltwin_forum_store sqlsrv serde_int_map_derive ndk-build log-tracing-layer	type-layout quickcheck_async lox-math rig-core sozu-command-lib	u-siem const_sv2 minus num-prime nameof	tree-sitter-typescript tetsy-jsonrpc-core guppy zenoh deku	embedded-can frame-election-provider-support diffy tch vulkano ark-r1cs-std dbus-tokio cw-ownable wax strict_encoding	keyboard-types opentelemetry-proto pretty-hex gix-utils prodash x11-clipboard target-features imagesize solana-native-token solana-program-pack	traitobject typed-builder bevy_asset ena smartstring opentelemetry objc-foundation thread-id memmap enumflags2_derive	pathdiff derive_builder_core hkdf ron predicates-core libsecp256k1-gen-ecmult cargo_metadata string_cache yaml-rust arc-swap	csv serde_with image lazycell csv-core prettyplease num-derive rustls-webpki windows-registry portable-atomic	toml_edit tracing-subscriber bytemuck tinyvec foreign-types-shared flate2 jobserver windows-core vec_map num-rational	num-integer crypto-common wasm-bindgen-futures walkdir socket2 futures hyper core-foundation-sys semver sha2	windows_x86_64_gnu serde_derive windows-sys itoa smallvec libc wasi log serde windows_i686_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	≤10 years
47304	31254	10516	19991	13408	15574	8859	9516	3322	1695	55
boing-internals oxidate yesqlr blackjack_commons ya	group-varint-offset-encoding static-self-derive pubky-app-specs console-codes cargo-vistree	markdown_converter ggez_tools dreck atm0s-sdn-multiaddr af_path	hwt n32g4xx-hal googleapis-tonic-google-cloud-documentai-v1beta1 nbformat bitcoin-scriptpubkeyman	tailwind-parse-macro rat-theme portman_client rustdns encodings	puzzlefs apisdk schedule_recv settings-schema signature_bls	stack-queue symphonia-codec-alac atsam4n16b-pac native-pkcs11 tmpl	asap_deps_keyserver ms3d sc-peerset termprogress degeneric-macros	arabic_reshaper ejdb rstack osmptparser rust-fsm-dsl	open_ai sha2-asm google-bigquerydatatransfer1 cfb gstreamer-net-sys	capnpc caseless fern petgraph bitflags

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
17024	13480	13340	20232	30421	20588	15013	12037	12840	6378	141
linkcheck2 slint-macros swc_ecma_compat_es2015 core-test-3 tulpje-handler	huawei-cloud-api-definitions-iDMEClassicAPI floretta durabletask-proto mwc_store z_osmf	googleapis-tonic-google-maps-unity moleculer modio-logger-db twilly clade	dotnet35_rand_rs buss-protocol rustygeard mahogany run-tool	flowcrafter slowcat tembo-telemetry rumqttd sim	async-i3ipc castle_tokenizer tugger ac-ffmpeg nasoone-lib	engula-kernel rues iweb sol_rng tree-sitter-traversal	serde-key-value-vec-map mark_last cassiopeia scal shunkakinoki	rfm9x brash bufferpool divisors wasi-rng	manenko-ds winutil tokio-bits char_stream drdns	promise xxhash rust-xmlrpc groove phf_mac

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
4155	6007	9218	17168	32404	24730	19606	16870	19088	11532	716
default-vec2 ankh easing-fixed stealth-gas-cli pest_railroad	zensical revm-trace minaws katex-v8 pyo3-object_store	docid pswatch iced_anim_derive crankshaft setwallpaper	justshell say-hello-tobialbertino rflow typeful hc_r2d2_sqlite	coretime-westend-runtime dotnet35_rand_rs apisdk nova-r8 rockbox	mythoji ilog bevy_simple_2d_outline turn-server cargo-codspeed	ledger-utils sol_rng bevy_combat libcnb-data arrow-digest	yaxpeax-superh pivot scal crm bondi	cxmr-api-clients rfm9x ilmenite serde_iter email-extractor	wasm-rust-utils beginner_tools libzfs libimaghabit hello_cargo	advapi32-sys static_slice geo maybe_utf8 pad

Number of releases per crate

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

1	2	≥4	≥8	≥16	≥32	≥50	≥100	≥500
50209	39822	31780	21317	11038	3691	2679	906	52
boing-internals ya yesqlr fbnc blackjack_commons	epsilonz cargo-vistree clipboard-ext static-self-derive stara	tembo-telemetry physfs-rs libsecp256k1-core simdjson-sys indentasy	passcod-accord git_mob unreal-doc pug git-bitmap	imag-link tsar parser-combinators parrot-network dingtalk-rs	sentry-anyhow git-actor arrow-digest node-launchpad nanoserde	async-nats mathcat nostr-sdk sway-fmt apisdk	wasm-bindgen-shared aws-sdk-wafv2 aws-sdk-transfer aws-sdk-cloudtrail snarkvm-algorithms	swc_ecma_transforms_classes rustc-ap-syntax swc_ecma_transforms_base swc_ecma_lints rustc-ap-rustc_data_structures

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
21110	7598	7799	6044	756	163	79	56	20	24
ernesto-jimenez nightfly19 fd canadaduane shanesveller	michaelklishin raggi khyperia robey mudge	jwiegley joshuaclayton tuffy bjeanes inre	lsegal yury kolektiv bepdotai madninja	labra rklaehn marirs jondot gadomski legoktm upsuper kossnocorp	ashWhiteHat arcnmx steveej holochain-release-automation2 tyleo phil-opp rust-embedded ubnt-intrepid	zicklag snnsnn asonix fluencebot kuviman fafhrd91 nullchinchilla jeremyBanks	magiclen matthiasbeyer matter-labs dignifiedquire haata yayanyang SUSYLABS FL03	sunfishcode kayabaNerve matthewkmayer cart Dirbaio yoshuawuyts piot miralandlabs	bouzuya awslabs kdy1 aptos-crates MaterializeInc RustCrypto benesch sdroege

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
20696	63739	52875	8385	9147	2326	3562	729	35
blackjack_commons sekai redispatch chainlink_api resx	stopwatch static-self-derive uh boxed_error polyhorn-test	pyo3-object_store clippit easy-qjs tembo-telemetry oxidate	r-tftpd lares quire google-translate3 bevy_mod_ui_independent_text	cargo-liner huawei-cloud-api-definitions-iDMEClassicAPI marseille cargo-compete node-launchpad	curve25519-dalek-ng s2n-tls-sys azure_mgmt_cosmosdb localghost atsame70n19	guessing_game_1732891 nf-rated openapitor mcup luajit-src	consalifold boring-sys mwa_hyperdrive schema_generator domlist	efm32gg12b-pac efm32gg-pac bpe-tokenizer wolfssl-sys linux-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
52093	23929	10838	5953	1801	444	55	14	9
cargo-vistree tiny_update_notifier download-file	cargo-nw tower-sessions-surrealdb-store turn-server treesitter_kind_collector	rustlings-macros malwaredb-types dockerify huawei-cloud-api-definitions-IEF fc-info	octavo-digest vuk solana-sdk-macro cairo-lang-formatter wee_alloc aws-sdk-resourcegroupstagging	mysqlclient-sys tquic multipart datafusion-physical-expr-common encoding deno_lib_ext lingua-czech-language-model	deno serde_with_macros mozjs_sys memmap2 glam sha3-asm snafu lindera-ipadic	tracing-subscriber reqwest sha3 rustls-webpki futures-util winnow openssl clap_builder base64	windows_x86_64_msvc regex-syntax encoding_rs syn image winapi tokio libsqlite3-sys regex-automata windows_aarch64_msvc	winapi-x86_64-pc-windows-gnu openssl-src windows libc linux-raw-sys ring windows-sys winapi-i686-pc-windows-gnu v8

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
24986	1446	272	175

Web frameworks
tower	axum	actix-web	warp	rocket	poem	rouille	gotham
2519	1325	960	462	433	141	39	21

TLS clients
rustls	native-tls	openssl
4164	1829	1486

git clients
git2	gix
1234	136

Loggers
log	tracing	slog
46541	23127	501

Error handling
thiserror	anyhow	quick-error	eyre	snafu	miette
39531	24104	3000	1865	1249	946

Argument parsers
clap	getopts	pico-args	argh	argparse
22370	1057	367	299	110

Markdown parsers
pulldown-cmark	markdown	comrak
883	167	143

TOML parsers
toml	toml_edit	basic-toml
12549	7638	105

Binary encoders
bincode	prost	rmp-serde	protobuf	ciborium	capnp
6394	3713	1546	1405	547	118

JSON parsers
serde_json	json5	simd-json	miniserde	tinyjson
40444	249	179	30	14

Parser generators
nom	pest	combine	peg	pom	lalrpop
8352	3984	1769	471	106	25

XML parsers
quick-xml	xml-rs	xmlparser	xml5ever	libxml	rxml	elementtree
1826	1821	770	241	93	28	24

Temp files
tempfile	tempdir
6631	468

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
1.84
1.83
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
1.60
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
1.84
1.83
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
1.60
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. 87% of requests were from stable (non-nightly) Rust versions. Less than 0.27% of requests came from Rust versions older than 1.65.

This many crates.io requests…	0%	5%	15%	47%	53%	77%	84%	90%	92%	93%	94%	96%	97%	98%	99%	99.1%	99.4%	99.7%
…use this stable version of Rust or newer	1.86	1.85+	1.84+	1.83+	1.82+	1.81+	1.80+	1.79+	1.78+	1.77+	1.76+	1.75+	1.72+	1.70+	1.69+	1.68+	1.67+	1.65+
This many crates.io requests…	5%	6%	7%	8%	9%	10%	13%
…use this or newer nightly version of Rust	1.86+	1.85+	1.84+	1.83+	1.82+	1.81+	1.80+

Lib.rs › Stats