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 759.0 million downloads in a single day, which is more than all downloads in the first 45 months since the release of Rust 1.0 in May 2015.

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

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

There are 58,795 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 233631 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
33471	18408	18995	21415	17749	14830	12971	11090	9817	8324

10	11	≥12	≥14	≥16	≥18	≥20	≥25	≥30	≥40	≥60	≥80	≥100	≥120	≥150
7038	6504	10090	7356	5953	4255	7144	3927	3532	1938	404	108	47	13	10
immortal-http twstock ars-server safe_crypto fox-dotfile	noem rsreddit azure_mgmt_deploymentmanager funzzy tray-item	longcallR taproot-assets-zk-verifier runtara-protocol sp-crypto-ec-utils insight-line	wl-clipboard-rs vpb well enprot raclettui	maplibre_native sudoku_machine zakat-ledger vegravis dioxus-cloudflare	libhans rona xs-http cmw gitpulse	rusqlite-ic greentic-oauth-core papa krokiet nipdf-render	geph4-vpn-helper bls12_381_plus stylus refman packler	pore cnidarium spiceai_duckdb_fork shadowquic api_openai	steady_state embystream phoenix_gui massive_game_server_core typos-cli	cuenv people-rococo-runtime tantivy scirs2-io manas_repo_opendal	deno_runtime_tauri veritas-nexus edm-core serde_arrow veilid-core	wash oxirs-fuseki staging-kusama-runtime agcodex-core pallet-staking-async-rc-runtime	mise qsv pmat zero4rs asset-hub-westend-runtime	pezkuwi-sdk apollo-router gnostr homestar-workspace-hack zigbee2mqtt-types

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
32297	26003	14842	7279	2571	2306	1443	607	284	182	126	137	85
tomcrypt-sys virtualizer cuddle-please-commands velodyne-lidar occlum-sgx	figment2 pavex_miette cargo-diet pingap-otel vmix-core	nvim-rs autodiff gl33 qcheck-macros storeit_core	tet-libp2p-core esp-rtos meerkat-core test-casing dpdk-sys	gpui trueno miden-protocol bus bb8-redis	dyn-hash riscv-rt zenoh-runtime debug-ignore panic-probe cacache pezsc-client-api homedir pallet-transaction-payment-rpc-runtime-api chashmap	glutin-winit protobuf-parse dioxus-core iced_core isahc serde_yaml_ng ethers-contract-abigen actix-testing wee_alloc oxc_index	d3d12 zvariant peg-macros ndk-glue trust-dns-resolver delegate solana-short-vec countme serde-xml-rs standback	sized-chunks threadpool objc2-io-surface oid-registry objc2-cloud-kit ar_archive_writer etcetera string_cache_codegen psm password-hash	objc k256 kernel32-sys ndk predicates core-graphics-types fuchsia-cprng crc inflector derive_builder	atty num_enum der phf combine rand_xorshift backtrace openssl-probe plotters-svg vec_map	deranged tracing-subscriber static_assertions time-macros glob pin-utils arrayvec allocator-api2 crunchy tower	tracing-core parking_lot futures-util winapi-i686-pc-windows-gnu semver futures-task lock_api lazy_static winapi-x86_64-pc-windows-gnu base64

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
66449	46471	15602	26967	17823	20422	11504	12042	5138	2507	464
insectbox openvm-rv32-adapters anvil-liquid-derive cmw pbbot	simple-digraph zsync tremor mind_sdk_lb modifier_macro	avin_utils packler tinycbor-derive vpb zigbee2mqtt_types_vendor_zen	petstore arct-tui disposition_ir_model npsimd rustdoc-json-stable	signal-gen-cjds66-lib maplibre_native engula jupyter tw_merge_variants	statum rhaki-cw-plus argentum_rest_infrastructure cargo-like-utils stack_epic_p2p	salvo-cli aldrin-macros iceoryx2-cal rooting-forms into_response_derive	re_format sc-rpc-spec-v2 sdl3-sys uniffi_testing vecmap-rs	laze flatc-rust good_lp koto_json pshovr	stm32l0 chrono-humanize hyper-multipart-rfc7578 libpulse-simple-binding fallible-iterator	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
34032	19958	18114	25200	33931	27268	20280	14609	20067	10534	1396
swc_experimental_ecma_ast_compat bevy_woff send_cells dioxus-cloudflare raclettui	rustlite kitmap vello_sparse_shaders data-nasdaq tlq-fhir-format	conway-gol-rs expr-solver-bin myer insight-line ink_env	moosicbox_search portmatching ctnapi spicy-uuid-gen unbinder	nipdf-render lure tychoos nvy celcius	tiny-merkle smashnet audiobookroom-client payment_strings serai-orchestrator	libphantomfs boing-internals gfx_64 fenris-geometry hellosamp	cess-sp-porep reverse_proxy gles31-sys node_api_system nclean	ux-indicators videotorno esp_idf_logger snake-case-rename bdf-parser	molasses talamel siredir unic-idna-mapping rustx	ilc-format-energymech tfs-fuse-sys telium keystream debugtrace

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
14035	12666	13811	22311	35451	31821	25638	19825	28761	17466	3604
verushash-rs ftui-simd autolua lgp-cli formatter-builder	rustler_logger_macro kitmap ribir-bot shaum-rules tlq-fhir-format	rapid-rs rustlite openapi-nexus arct-tui trezoa-stable-layout	rust-guardian just-mcp-lib ctnapi aws_utils_firehose zelos-trace-types	wingl lure get-file-size embed-resources rxvm	teom_guessing_game bevy_mod_async agave-geyser-plugin-manager linf tfhe-cuda-backend	serde_json5 dyn_ord handoff libphantomfs pink-runtime	azure_mgmt_deploymentmanager streamflow-sdk wordletron zeil jsonpath-plus	ux-indicators snake-case-rename pilka_ash tfsi bdf-parser	wl-clipboard-rs quilt tentacle tokio-test calcify	rust-puppetdb-cli tfs-fuse-sys codeplatter renv sgx-isa

Number of releases per crate

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

1	2	≥4	≥8	≥16	≥32	≥50	≥100	≥500
69984	54398	43755	29560	16518	5502	3781	1813	78
openvm-rv32-adapters pbbot anvil-liquid-derive cmw insectbox	zsync zigbee2mqtt_types_vendor_zen packler rocket_anyhow unc-abi-client-impl	clock-bound-shm bsor aws-auth-payload local-type-alias krab	adflib lightbird sudoku_machine wukong glslt_cli	tnj-tui kn-graph object-rainbow-json bamboo-agent greentic-component-manifest	opensession-git-native wasmtime-internal-jit-icache-coherence huawei-cloud-api-definitions-VCM google-firebasedynamiclinks1 pgbatis	byte-unit gitoxide wit-encoder wasm-bindgen-multi-value-xform git-odb	mycelium-key-value leptos_axum lance-datafusion nu-table pijul	solana-logger swc_ecma_transforms_testing solana-clap-utils solana-perf solana-measure

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
27946	10088	10350	8344	1071	261	110	83	40	44	2
macournoyer fd corasaurus-hex canadaduane mdub	mudge michaelmelanson vic raggi jvantuyl	ratmice oleganza walf443 nchapman bjc	bnusunny thequux madninja mazdak jcoletaylor	kou voluntas auxesis itiu chriswk amandasaurus maxcountryman upsuper	ForsakenHarmony carryxd mokurin000 Keruspe arcnmx 06chaynes danieldk hko-s	ryankurte losfair bmbper arceos-org kpcyrd jeremyBanks ahaoboy rise0chen	nymtech jstuczyn boozook haata ma2bd valff rivy danielhenrymantilla	vpetrigo bytecodealliance artob swc-bot Dirbaio AlexAegis wasmerio tp-m	aptos-crates mingyang91 benesch suzmue kdy1 ruvnet coryan rusoto

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
23389	73751	85243	16832	15996	3565	5479	1095	39
simple-digraph pbbot zigbee2mqtt_types_vendor_zen modifier_macro hello_macro	rusqlite-struct-derive console-codes edrv-ltr390uv rename kdmapi	tree-sitter-gomod gearhash azure_mgmt_deploymentmanager logfather yew-plotly	sapter azul-glutin fmi ome-metadata cargo-workspaces	therenderer atsams70q19b eure-document amtrack_rs rustledger-query	libmqm-sys font-awesome-as-a-crate esp32s2 kya-validator rsfdisk	equi-ty spreadsheet-mcp telraam-rs kon system-theme	mpeg2ps ripmors bevy_mod_async GORBIE eyepiece	occt-sys stm32-metapac efm32lg-pac musix 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
37208	19420	10044	5346	2646	1178	234	33	37
kitmap smartcardhsm_pkcs11_loader catbox	popol rusqlite-ic tandem-tools beleth	rs162 grdf comfy-bounded-ints iced_video_player tray-item	scale-encode-derive syn-inline-mod p3-monty-31 winapi_forked_icmpapi zizmor aws-sdk-xray	cxxbridge-flags tauri-bundler pgrx idea ibc-proto multiboot2-common lance-datafusion	dialoguer sentencepiece-sys serenity gdk json-patch lingua-xhosa-language-model sentry-types mockito	rkyv gix phonenumber num-bigint-dig pulldown-cmark redis semver ratatui tree-sitter-cpp	jiff winnow hyper tiff serde_json deno_core_icudata secp256k1-sys bstr rustls-webpki chrono	petgraph winapi windows_i686_gnullvm windows_aarch64_gnullvm libz-sys regex-syntax windows_x86_64_gnullvm encoding_rs windows_aarch64_msvc librocksdb-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
44184	1596	534	331

Web frameworks
tower	axum	actix-web	rocket	warp	poem	rouille	gotham
6256	3755	1308	592	558	157	47	20

TLS clients
rustls	native-tls	openssl
6888	2406	1855

git clients
git2	gix
2004	301

Loggers
log	tracing	slog
68018	41129	542

Error handling
thiserror	anyhow	quick-error	eyre	snafu	miette
72914	41890	3271	3078	1993	1726

Argument parsers
clap	getopts	pico-args	argh	argparse
34510	1573	746	411	119

Markdown parsers
pulldown-cmark	comrak	markdown
1521	325	285

TOML parsers
toml	toml_edit	basic-toml
21543	12358	208

Binary encoders
bincode	prost	rmp-serde	protobuf	ciborium	capnp
9961	6389	2463	1760	1382	179

JSON parsers
serde_json	json5	simd-json	miniserde	tinyjson
69046	556	498	69	30

Parser generators
nom	pest	combine	peg	pom	lalrpop
12768	6179	2510	845	235	25

XML parsers
quick-xml	xml-rs	xmlparser	xml5ever	libxml	rxml	elementtree
3372	2193	1259	417	98	32	24

Temp files
tempfile	tempdir
11244	510

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
1.93
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
1.93
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 0.12% of requests came from Rust versions older than 1.60.

This many crates.io requests…	0%	0%	5%	41%	50%	57%	71%	73%	77%	78%	86%	89%	90%	91%	92%	98%	98%	99.1%	99.5%	99.6%	99.7%	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+	1.87+	1.86+	1.85+	1.83+	1.82+	1.80+	1.75+	1.74+	1.72+	1.70+	1.67+	1.65+	1.60+
This many crates.io requests…	0%	4%	5%	7%	7%	7%	7%	8%	8%	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+	1.87+	1.86+	1.85+	1.83+	1.82+	1.80+	1.75+

Lib.rs › Stats