Heapless

Heapless is used at run time in 1,565 crates (of which 315 optionally). It is a direct run-time dependency in 486 crates. It's used at build time in 1 crate (). It's used only as a dev dependency in 124 crates (of which 30 directly).

Number of dependers	Heapless version	Downloads/month
884	0.8.0	647K
628	0.7.17	392K
54	0.6.1	11K
107	0.5.6	14K
16	0.4.4	950
1	0.2.7	750

Depender (with downloads and own rev deps)			Heapless version
6.6M	241	ipnet	optional	^0
2.0M	121	aead	optional	^0.7
583K	112	faster-hex		^0.8
445K	59	rstar		^0.8
923K	42	zvariant	optional	^0.8.0
526K	302	postcard	optional	^0.7.0
167K	48	smoltcp		^0.8
88K	4	serde_prometheus		^0.8
82K	96	embassy-sync		^0.8
164K	30	crc-any	optional	^0.8
47K	15	wasmer-wasix		^0.7.16
36K	6	flacenc		^0.8.0
35K	117	usb-device		^0.8
95K	28	domain	optional	^0.8
95K	5	octseq	optional	^0.8
69K	64	ts-rs	optional	>=0.7, <0.9
21K	12	embassy-time-queue-utils		^0.8
66K	35	serde-json-core	optional	^0.8
16K	11	pgrx		^0.8
13K	23	embedded-svc		^0.8
13K	23	esp-idf-hal		^0.8
14K	2	esp-idf-part		^0.8.0
10K	2	bt-hci		^0.8
8.3K	10	iso7816		^0.7
8.0K	14	embassy-usb		^0.8
7.9K	29	esp-idf-svc		^0.8
7.7K	8	embassy-net		^0.8
7.3K	55	cortex-m-rtic		^0.7.7
6.6K		komac		^0.8.0
6.6K	18	embedded-sdmmc		^0.8
6.0K	1	embedded-test		^0.8.0
16K	1	edge-executor	optional	^0.8
4.8K	21	ansi-parser		^0.8.0
4.7K	2	esp-wifi		^0.8.0
4.5K	38	atsamd-hal		^0.8
3.5K	5	coap-message-implementations		^0.8
2.9K	1	edge-nal-embassy		^0.8
9.3K	4	mipidsi	optional	^0.8.0
2.9K	3	embedded-tls		^0.8
2.8K	2	edge-dhcp		^0.8
2.7K	2	tlv-rs		^0.7.16
2.4K	5	minimq		^0.8
2.3K	1	liboscore-cryptobackend		^0.7
2.3K	1	cyw43		^0.8.0
2.3K	1	reqwless		^0.8
2.0K		minicbor-adapters		^0.8.0
2.0K	4	elliptic-curve-tools		^0.8
2.0K	17	heapless-bytes		^0.8
1.9K	6	postcard-rpc		^0.8.0
1.9K	6	anise		^0.8.0
1.9K	7	esp-hal-common		^0.8.0
1.8K	1	embedded-nal-coap		^0.7
1.7K	3	rtic-sync		^0.8
1.7K	8	palaver		^0.5
1.6K	11	stak-file		^0.8.0
1.6K	1	picoserve		^0.8.0
1.5K	3	nmea		^0.8
4.9K	7	sequential-storage	optional	^0.8.0
1.4K	1	coap-message-demos		^0.7
1.2K	2	stak-dynamic		^0.8.0
1.2K	9	aranya-policy-vm		^0.7
1.1K	2	aranya-runtime		^0.7
1.1K	1	package-family-name		^0.8
1.1K	5	aranya-fast-channels		^0.7
4.0K		rsiot	optional	^0.8.0
1.0K	8	atat		^0.8
950	2	kanata-keyberon		^0.7.16
900	5	mqttrs		^0.7
3.2K		ts-rs-json-value	optional	^0.7
850	3	smoltcp-nal		^0.7
850		foundation-urtypes		^0.8
800	4	littlefs2		^0.7
750		foundation-ur		^0.8
750	1	embedded-nal-minimal-coapserver		^0.5
750	5	sans-io-runtime		^0.8
750		rust-mqtt		^0.8
700	3	miniconf_mqtt		^0.8
700	3	esp32-nimble		^0.8.0
650		foundation-firmware		^0.8
650	1	oktree		^0.8.0
600	2	va108xx-hal		^0.8
600		moondancer		^0.8.0
600		usbpd		^0.8.0
550	1	ethercrab-wire		^0.8.0
550		ethercrab		^0.8.0
500	11	cortex-m-rtfm		^0.5.0
500	1	usbd-human-interface-device		^0.8
2.0K	8	postcard-schema	optional	^0.7
490		pca9539		^0.8.0
490		stabilizer		^0.8
480	4	generic-btree		^0.7.16
1.9K	1	justjson	optional	^0.8.0
460		scalesocket		^0.8.0
440		hopter		^0.8
1.8K	6	rmodbus	optional	^0.8.0
420	1	nrfxlib		^0.7
410	1	jh71xx-hal		^0.7
390	1	edge-nal-std		^0.8
390		rp-rs-radio-clock		^0.8
360	3	apdu-dispatch		^0.7
350		postcard-heapless-compat		^0.8.0
320	1	embedded-websocket		^0.7.16
320	1	seeed-erpc		^0.5
310		person-sensor		^0.8.0
1.4K	2	encdec-base	optional	^0.8.0
300	1	async-io-mini		^0.8
300	2	loro-delta		^0.8.0
290	3	embedded-nano-mesh		^0.8
290		rsa_heapless		^0.8.0
290	1	ppproto		^0.8.0
290		ansi_parser_extended		^0.8.0
280	1	udevrs		^0.8
280	1	edge-http		^0.8
280	3	ws2812-esp32-rmt-driver		^0.8
270	1	canadensis_serial		^0.7.7
250	3	serial-settings		^0.8
240		embedded-jsonrpc		^0.8.0
240		cheetah-game-realtime-protocol		^0.7.16
240	2	nrf-softdevice		^0.8.0
240		gt911		^0.8
240	1	riscv-slic		^0.8.0
230		embedded-plots		^0.7.3
230	1	ctap-types		^0.7
210	1	kiibohd-hid-io		^0.7.16
200	1	mqttrust_core		^0.7
190		keytokey		^0.7
190		rktk-drivers-nrf		^0.7.0
180		microscpi		^0.8.0
180		embedded-c-sdk-bind-hal		^0.8.0
170	1	wasm4-impl		^0.7.9
1.0K	3	serde_at	optional	^0.8
160		booster		^0.8
160	2	rktk-drivers-common		^0.7.0
150		fido-authenticator		^0.7
150		zmodem2		^0.8.0
150		shproto-rs		^0.7.16
150		quectel-bg77		^0.7.3
140	1	embedded-update		^0.7
140	1	kiibohd-usb		^0.7
900	3	littlefs2-core	optional	^0.7
140		usbd-ccid		^0.7
140		aem10900		^0.8.0
140		psf-rs		^0.8.0
140	1	minireq		^0.8
130	2	kiibohd-hall-effect		^0.7
130	2	va416xx-hal		^0.8
130		se05x		^0.7
130		stretch2		^0.7.9
120		esp-at-nal		^0.8
120		poststation-fw-icd		^0.8
120		rmk		^0.8.0
120		esp-embassy-wifihelper		^0.8.0
120		mini-rxtx		^0.7
120		nw-engine		^0.8.0
110		m5dial-bsp		^0.8.0
110	3	mfrc522		^0.8
110	1	eb90		^0.7
850	1	random_variant	optional	^0.7
110		xdevs-no-std		^0.8
110		thermostat-eem		^0.8
110	3	embedded-nal-tcpextensions		^0.7
100		buoyant		^0.8
100		kiibohd-hall-effect-keyscanning		^0.7
100		le-stream		^0.8
		kolibri-embedded-gui		^0.8
		ekv		^0.8
	1	dot15d4-frame		^0.8.0
750		serde-csv-core	optional	^0.7.16
	14	wasmrs-codec		^0.7
		heapless_matrix		^0.8.0
		hwatch		^0.8.0
		is31fl3743b		^0.7
	1	noproto		^0.8
		rx8900		^0.8
		roboplc-rpc		^0.8
		ais		^0.7
		ockam_entity		^0.7
		embedded-exfat		^0.7
	3	ushell		^0.8.0
		writebuf-core		^0.7
		embedded-huffman		^0.8.0
		emc2101		^0.8
		wio_terminal		^0.5
		nutp		^0.8
	2	ockam_executor		^0.8
700		wasm-msgpack	optional	^0.7
	1	edge-mdns		^0.8
700	3	micropb	optional	^0.8
		codec		^0.8.0
		heapless_topo		^0.8.0
		tinygif		^0.7.16
	1	canadensis_pnp_client		^0.7.7
	2	gctex		^0.8.0
		hal-sim		^0.8
	1	embedded-websocket-embedded-io		^0.8.0
	8	pgx		^0.7.16
	2	mwatch_kernel		^0.4.2
		embassy-net-esp-hosted		^0.8
	1	embedded-nal-minimal-coaptcpserver		^0.7
	1	pinetime-mynewt		^0.5.1
	3	rubble		^0.5.1
		Rusty_CryptoAuthLib		^0.5.5
	4	hmac-sha		^0.7
	1	pinetime-lvgl		^0.5.3
	3	signature_core		^0.7
		embassy-net-adin1110		^0.8
		keyberon		^0.5
		miniconf_cli		^0.8.0
600		satrs	optional	^0.7
	4	tracing-serde-structured		^0.7.10
		nostr-nostd		^0.7.14
		barebones-watchface		^0.5.1
		zip_parser		^0.7
		ltc681x		^0.8.0
		embedded-fps		^0.7
	1	lorawan-device		^0.7
	3	trussed		^0.7
	2	phm-icd		^0.7.10
	2	pinetime-watchface		^0.5.1
	2	sunset		^0.8
		embedded-sdmmc-dev		^0.8
		log-to-defmt		^0.7
	1	hm11		^0.4.1
		pacmog		^0.8.0
		prinThor		^0.8.0
		tfmt		^0.8.0
		blues-notecard		^0.7
		erdnuss-comms		^0.7.0
		nrf-modem-nal		^0.7.10
		riot-wrappers		^0.8
		trenchcoat		^0.7
		os_essentials		^0.8
	1	fuga-json-seq-parser		^0.7.16
		robokit		^0.7
		ublox-sockets		^0.7
		nuttx-embedded-hal		^0.7.10
	1	phm		^0.7.10
		senml-deser		^0.7
550	1	serde-brief	optional	^0.8.0
		bl602-sdk		^0.7.3
		disco-rs		^0.7
	2	trackball		^0.8.0
		max32660-hal		0.7.*
		nmea-0183-validator		^0.7.10
		quicklog		^0.7.16
		eui-no-std		^0.5
		logz		^0.7.13
		rustot		^0.7.0
		sidh		^0.7.7
		can_aerospace_lite		^0.7.4
	7	canadensis_core		^0.7.7
		emb-ssdraw		^0.8
		esp8266-at-driver		^0.7
	1	futex-queue		^0.7
		mvstore		^0.7
		cblt		^0.8.0
	3	drogue-network		^0.5
		esp-hal-dhcp-server		^0.8.0
		esp-ieee802154		^0.8.0
	2	mqttrust		^0.7
		oath-authenticator		^0.7
	1	tracing-rtt		^0.8
		drgdfu		^0.7
		drogue-esp8266		^0.5.5
		drogue-rak811		^0.5.5
		rart-rs		^0.7.10
550	8	st7789	optional	^0.7
		choreographer		^0.7.1
		crdt-richtext		^0.7.16
		esp8266-wifi-serial		^0.7
	1	i2c-pio		^0.8.0
		mcutie		^0.7.0
		scd30		^0.4.2
	2	graphite_server		^0.7.15
	1	purezen		^0.4
		rak811-at-driver		^0.7
		ascii-osd-hud		^0.6
		at-cryptoauth		^0.7
		drogue-tls		^0.7
	5	kaspa-wallet-core		^0.8.0
	1	monster_chess		^0.8.0
	1	moonboot		^0.7
		roci		^0.8
		urpc		^0.5.1
		verdigris		^0.6
		watchface		^0.5
		zipng		^0.7.16
		alg-grid		^0.5
		alrulab-core		^0.8.0
		anachro-forth-core		^0.7.8
		crankstart		^0.6.1
		leak-detect-allocator		^0.5.4
		sunset-async		^0.8
	1	w5500-tls		^0.8
		drogue-http-client		^0.5
		itla		^0.7
		mqtt-sn		^0.7.7
		orouter-serial		^0.7
		svisual		^0.7
		vesc-comm		^0.4.1
		algo_no_std		^0.7.16
		bandsocks-sand		^0.5
	2	canadensis_data_types		^0.7.7
		drogue-es-wifi		^0.5.6
	1	drogue-ffi-compat		^0.5.5
		edge-std-nal-async		^0.8
		es-wifi-driver		^0.7
		esp-hal-mfrc522		^0.8.0
		factbird-common		^0.7
		fuga-remo-api		^0.7.16
		infinity-sampler		^0.8
		rfm69-async		^0.7.16
		ublox-cellular-rs		^0.7
		ufmt-utils		^0.7.16
		ak09940a		^0.8
		anachro-server		^0.5.5
		axum-postcard		^0.8
		blipper		^0.5.1
		digital-filter		^0.5.1
	1	graphite_magma		^0.7.15
		synth-utils		^0.7
	1	vhrdcan		^0.5.6
	2	canadensis		^0.7.0
		gmqtt		^0.7.7
		handdrawn-watchface		^0.5.1
	1	kiibohd-hid-io-ffi		^0.7.10
		mcumeter		^0.7
		timesource		^0.7.8
		esp-at-driver		^0.6.1
		esp32-wroom-rp		^0.7.16
		hwatch-ansi-parser		^0.6.1
		lc3-codec		^0.7.10
		max11300		^0.8
	1	rucos		^0.7
		state-governor		^0.7.4
		stm32wb-hal		^0.5.3
		ublox-short-range-rs		^0.5
		uhr		^0.4.2
		wire4		^0.5.2
		core-serde-json		^0.5.0
		mks979b		^0.7.10
		multi-mission-library-rs		^0.8.0
		mwatch-kernel-stm32l4		^0.4.2
		nrf52-bin-logger		^0.5.1
		rand_pwd		^0.5.5
		tiny-nmea		^0.7.5
	3	canadensis_can		^0.7.0
	3	hid-io-protocol		^0.7
		junctor		^0.5.5
	7	kll-core		^0.7
		light-cli		^0.4.2
		lpwan		^0.5.5
		n2k		^0.5.5
		phm-worker		^0.7.10
		rustuino		^0.7.7
		wurth-calypso		^0.7.16
		itsdns		^0.7
		kiibohd-core-ffi		^0.7
	3	rktk		^0.7.0
		rustworks		^0.7
		ssd1362		^0.5
	1	ssp		^0.7
		canadensis_bxcan		^0.7
	1	cody-c		^0.8.0
	3	dmx-rdm		^0.8
		dmx512-rdm-protocol		^0.8.0
		finny		^0.7
	1	lpc55-rtic		^0.6.0
		sirena		^0.7
		vax-number		^0.7
		etherage		^0.7.16
		liecs		^0.8.0
		myser		^0.7.15
		nucleo-h7xx		^0.7.16
		veriform		^0.5
	1	a4-core		^0.7.8
	2	anachro-icd		^0.5.5
		blinker		^0.8
		blinq		^0.7.0
	1	hid-io-core		^0.7
	1	ockam_signature_core		^0.6
	1	usb-pd		^0.7.16
		ad7147		^0.7.16
	2	byte-slab		^0.7.5
	1	canadensis_udp		^0.7.7
		canboat-rs		^0.8.0
		crosstrait		^0.8
	1	expanse		^0.5.1
		google-cloud-iot-jwt		^0.7.9
		hc14-at-rs		^0.7
	2	klogger		^0.7.14
		knetrs		^0.7.16
		mnemos		^0.7.10
		ndef		^0.8
		smoltcp_null_modem		^0.8
		stak-primitive		^0.8.0
		stratum-v1		^0.8
		usbd-ethernet		^0.8
		coap-gatt-utils		^0.7.16
		coap-zero		^0.7
		compact-map		^0.8
		dango-core		^0.7.16
	2	dcs2		^0.7.16
		esp-hal-mdns		^0.8.0
		fusb302b		^0.7.16
		iotzio		^0.8
		iqs323-driver		^0.8.0
		is31fl3733		^0.7.16
		mountain-mqtt		^0.8
		norfs		^0.7
		opslag		^0.8.0
		py32f030_hal		^0.7
	1	rainmaker-components		^0.8.0
		rfc3339		^0.8.0
	1	rpk-firmware		^0.8
		rs-matter		^0.7.16
		seeed-lora-e5-at-commands		^0.8.0
		sma-proto		^0.8.0
		smbus-adapter		^0.8
		smoltcp-rmodbus		^0.8.0
		socketcand		^0.8.0
		ssd1331-async		^0.8.0
440	3	flexiber	optional	^0.7.0
390	3	cbor-smol	optional	^0.7
240	2	postcard-bindgen-core	optional	^0.8.0
210		embedded-msgpack	optional	^0.7
170	1	esp-partition-table	optional	^0.8
120	2	kiibohd-keyscanning	optional	^0.7
110		edge-frame	optional	^0.8
		msgpck	optional	^0.7.16
	2	ft6x06	optional	^0.7
		ockam_vault_core	optional	^0.7
		every_variant	optional	^0.7.0
	18	ockam_node	optional	^0.8
		sacn-unofficial	optional	^0.5.3
		no_alloc	optional	^0.5.5
		creature_feature	optional	^0.7.16
		bin-utils	optional	^0.7.16
	1	blipper-shared	optional	^0.5.5
		buf_sized	optional	^0.8.0
	1	channel-bridge	optional	^0.8
		fastprio	optional	^0.7.16
		flex-dns	optional	^0
		kvs	optional	^0.7.15
		macbinary	optional	^0.7.16
		mipidsi-async	optional	^0.7.16
		nb-executor	optional	^0.7.10
		ockam_credential	optional	^0.6
		ockam_transport_ble	optional	^0.8.0
		orouter-wireless	optional	^0.7
		ourobuf	optional	^0.8
		py-rs	optional	>=0.7, <0.9
		pybadge-high	optional	^0.7.16
	3	rktk-keymanager	optional	^0.7.0
	2	rktk-rrp	optional	^0.7.0
		rw-exact-ext	optional	^0.8
		satrs-core	optional	^0.7
	2	ser-write	optional	^0.8
		simple-tlv	optional	^0.6.0
		stor	optional	^0.7.9
		systemview-target	optional	^0.7
		unchecked-std	optional	^0.8.0
		usecop	optional	^0.8
281K	83	pretty-hex	dev	^0.8
8.8K	15	rp-pico	dev	^0.7.16
6.2K	45	stm32f4xx-hal	dev	^0.8
4.9K	6	nu-pretty-hex	dev	^0.8
2.3K	33	stm32f1xx-hal	dev	^0.7.16
1.1K	7	miniconf	dev	^0.8.0
1.0K	1	esp32c3-hal	dev	^0.8.0
950		gsw	dev	^0.7
800	3	esp32-hal	dev	^0.8.0
800	3	micromap	dev	^0.8.0
650		esp32s3-hal	dev	^0.8.0
600		n32g4xx-hal	dev	^0.8
550		adafruit-seesaw	dev	^0.8
500		esp32s2-hal	dev	^0.8.0
490	2	sh1106	dev	^0.7.10
480		esp32c6-hal	dev	^0.8.0
400		esp32c2-hal	dev	^0.8.0
380		feather_m0	dev	^0.8
380	4	serde-indexed	dev	^0.7.16
270		feather_m4	dev	^0.7
250	2	toad-msg	dev	^0.7
230		postcard-bindgen	dev	^0.8.0
160		esp32h2-hal	dev	^0.8.0
	1	lpc55-hal	dev	^0.7
	6	stm32l4xx-hal	dev	^0.5
	1	riscv-peripheral	dev	^0.8.0
	1	lorawan	dev	^0
	1	dwm1001	dev	^0.7.8
	1	kwap-msg	dev	^0.7
	1	ufmt_float	dev	^0.7
	1	flem	dev	^0.7
	1	atoi_radix10	dev	^0.7
	1	stm32l0xx-hal	dev	^0.7.1
		ch58x-hal	dev	^0.8.0
	2	stm32f1xx-hal-bxcan	dev	^0.5.6
		mwatch-sdk	dev	^0.4.1
		canadensis_macro	dev	^0.7.7
		ds1302	dev	^0.6
		htpa32x32d	dev	^0.4.0
		lpc55s6x-hal	dev	^0.5
	2	canadensis_encoding	dev	^0.7.0
		sized-dst	dev	^0.8
		firmware-controller	dev	^0.7
		dyn_phy	dev	^0.8
		p1am_100	dev	^0.7
		adafruit-kb2040	dev	^0.7.16
		cmim	dev	^0.5.1
		itsybitsy_m0	dev	^0.7
		oled_async	dev	^0.7.10
		pulau-rs	dev	^0.7.16
		xmc4-hal	dev	^0.8.0
		caprand	dev	^0.8
		todc-mem	dev	^0.7