Open Authority Rating

Top .io domains

From the cc-main-2026-aug-sep-oct release (134,979,706 ranked domains). Ordered by harmonic-centrality rank, OAR’s primary input — two OAR integers can tie or invert slightly through the PageRank component.

HC rank	Domain	OAR
#42	github.io	79
#149	readthedocs.io	72
#492	termly.io	67
#499	jenkins.io	65
#570	imagekit.io	65
#594	polyfill.io	65
#607	meduza.io	63
#633	codepen.io	66
#640	kubernetes.io	64
#654	webflow.io	65
#671	codesandbox.io	64
#674	bubble.io	64
#734	modelcontextprotocol.io	65
#956	greenhouse.io	63
#968	gitbook.io	63
#1,057	iili.io	61
#1,140	opensea.io	61
#1,150	home-assistant.io	63
#1,277	transcend.io	63
#1,343	thenewstack.io	60
#1,344	getmdl.io	59
#1,399	redis.io	61
#1,407	dream.io	59
#1,440	dropwizard.io	59
#1,448	exo.io	59
#1,470	angular.io	60
#1,531	statuspage.io	63
#1,635	bazel.io	58
#1,644	sanity.io	63
#1,658	elevenlabs.io	60
#1,795	itch.io	60
#1,836	prometheus.io	59
#1,847	sentry.io	61
#1,904	metamask.io	58
#1,941	jestjs.io	59
#2,030	wiz.io	58
#2,069	cncf.io	59
#2,083	gitlab.io	59
#2,087	etherscan.io	59
#2,102	gong.io	58
#2,134	atom.io	58
#2,160	synthesia.io	58
#2,169	veed.io	57
#2,198	pypa.io	59
#2,210	aframe.io	58
#2,225	pxf.io	59
#2,246	crowdcast.io	56
#2,302	shields.io	60
#2,336	grpc.io	59
#2,337	osf.io	58
#2,394	swagger.io	58
#2,395	material.io	57
#2,438	jwt.io	59
#2,455	sourceforge.io	58
#2,459	readme.io	59
#2,494	n8n.io	58
#2,559	gohugo.io	59
#2,593	stocksnap.io	55
#2,631	babeljs.io	58
#2,641	opentelemetry.io	58
#2,651	branch.io	59
#2,801	terraform.io	58
#2,830	frame.io	57
#2,839	powr.io	57
#2,869	ngrok.io	56
#2,885	apollo.io	56
#2,942	streamlit.io	56
#3,057	confluent.io	56
#3,060	restream.io	56
#3,072	ipfs.io	55
#3,197	ipinfo.io	56
#3,252	smartly.io	57
#3,282	pnpm.io	57
#3,315	prismic.io	58
#3,343	builder.io	57
#3,376	snyk.io	56
#3,422	pendo.io	56
#3,578	shinyapps.io	56
#3,653	draw.io	53
#3,662	socket.io	56
#3,668	trustindex.io	61
#3,695	urlscan.io	53
#3,799	codementor.io	53
#3,815	agora.io	54
#3,904	pantheonsite.io	57
#3,930	funnel.io	55
#3,944	keras.io	54
#4,021	stoplight.io	55
#4,045	vaultproject.io	55
#4,104	sjv.io	56
#4,130	bower.io	56
#4,139	salesmate.io	53
#4,278	spring.io	55
#4,309	envoyproxy.io	55
#4,367	intercom.io	55
#4,407	min.io	54
#4,419	podigee.io	56
#4,474	infura.io	53
#4,504	qt.io	55
#4,584	hackmd.io	54