Top .io Websites & Domains

There are 382,182 active websites across 1,004,312 registered .io domains (38.1% active). Here are some of the most popular .io sites, the technologies they run, and the companies behind them.

Download the .io list

Download a free sample of the .io websites list

Real rows from the list on this page. The file arrives by email.

250 rows
17 columns
CSV

Every column in the file

Popularity Rank
Domain
Company Name
Company Size
Year Founded
Industry
LinkedIn URL
Locality
Country
TLD
Language
Instagram
Twitter
YouTube
TikTok
Technologies Tracked
Premium Technologies

Column headings inside the file are written in English. Not every column is filled for every website.

A look at the file

Domain	Company Name	Technologies Tracked	Premium Technologies
sentry.io	Sentry	45	20
merkle.io	Merkle	12	1
branch.io	Branch	42	15
oxylabs.io	Oxylabs.io	21	4

Total Domains Found: 1M
Technologies detected: 19,566
Active websites: 382K (38.1%)

Most popular .io websites

by popularity

Local rank	Website	Global rank	StackSpend	Technologies detected
1	sentry.io	98	$1.28M+	Microsoft 365 Box Enterprise Vercel Dropbox Business Plausible Analytics
2	0xrpc.io	145	$13.18K+	MEVSPACE Njalla DNS
3	adobe.io	173	$2.76K+	Google Search Console GlobalSign Amazon Web Services Agari
4	merkle.io	360	$46.38K+	Plausible Analytics Next Js Cloudflare Google Workspace React
5	pangle.io	421	$45+	Akamai Technologies DNS
6	branch.io	437	$1.35M+	Adobe IDP Zapier Amazon Route 53 DNS Notion Site Uber for Business
7	oxylabs.io	481	$887K+	Cloudflare Insight Statuspage NordPass React OnDMARC
8	intercom.io	585	$2.42M+	Sanity Amazon Web Services TailScale Vercel Next Js
9	grammarly.io	607	$2.76K+	dmarcian Google Workspace Amazon Web Services Anthropic
10	xhmikosr.io	633	$6.33K+	Fastly GitHub Pages Cloudflare Google Search Console
11	ipinfo.io	640	$31.64K+	Adobe Fonts Next Js Mailgun HubSpot Zendesk
12	pendo.io	654	$2.51M+	Atlassian Drift HubSpot Apple Business Manager Miro
13	1rx.io	659	$45+	Outlook for business IBM NS1 Connect Sectigo Microsoft 365
14	bidr.io	686	$2.76K+	Google Search Console Amazon Web Services
15	liftoff.io	701	$166K+	Apple Business Connect Salesforce 1Password Business Jamf Google Search Console
16	yellowblue.io	801	$2.76K+	Amazon Route 53 DNS Google Search Console
17	nic.io	836	$5.51K+	AWS Global Accelerator Google Workspace Sectigo OnDMARC
18	docker.io	864	$41.4K+	Fastly MariaDB Detectify Amazon ComodoCA SSL
19	readthedocs.io	947	$5.18K+	SSL.com DigiCert Amazon Web Services Google Trust Services Read the Docs Addons
20	kniebes.io	951	$5.17K+	Google Search Console All-Inkl Kasserver Email
21	split.io	976	$248K+	Airtable Amazon Web Services Miro WebFontLoader Webflow
22	agora.io	978	$177K+	Google Search Console Trust Provider SSL Outlook for business Microsoft 365 jsDelivr
23	4dex.io	993	$2.45K+	Google Search Console Cloudflare DNS
24	bidmachine.io	1,001	$32.51K+	Webflow Amazon SES Cloudflare DNS HubSpot Zoom
25	liftoff-creatives.io	1,007	$1.93K+	Amazon Route 53 DNS
26	wpguardian.io	1,027	$11K+	WordPress Litespeed Cloudflare DNS HubSpot
27	tubi.io	1,038	$1.93K+	Amazon Route 53 DNS GlobalSign
28	segment.io	1,074	$17.63K+	Statuspage Adobe Amazon Web Services TrustArc Valimail
29	cardgames.io	1,310	$4.41K+	Amazon Trust Services Amazon S3 Google Trust Services Google Workspace Translate Js
30	statuspage.io	1,385	$3.69K+	Amazon Trust Services Proofpoint DMARC Salesforce Marketing Cloud Meta Business Suite Amazon Route 53 DNS
31	ssstik.io	1,406	$4.26K+	Google Search Console Cloudflare
32	byteconnect.io	1,453	$4.19K+	Google Search Console React Cloudflare Next Js
33	privacymanager.io	1,983	$1.93K+	Amazon
34	getgrass.io	2,083	$503K+	Cloudflare Trustpilot Google Search Console
35	metamask.io	2,165	$26.41K+	Osano Google Search Console React Miro DMARC Digests
36	presage.io	2,189	$1.18K+	Mandrill DocuSign Gandi Google Workspace Mailchimp
37	itch.io	2,205	$4.54K+	Postmark DMARC ZOHO React Cloudflare MightyGrep
38	litix.io	2,214	$1.93K+	Envoy Amazon Web Services ZeroSSL
39	gos-gsp.io	2,259	$1.93K+	Amazon Route 53 DNS
40	mediago.io	2,271	$3.36K+	Amazon Google Search Console Nuxt.js Rem Amazon Trust Services
41	shodan.io	2,315	$3.33K+	Anthropic Microsoft 365 Envoy Google Workspace Cloudflare
42	adobestats.io	2,337	$1.93K+	Agari Amazon Route 53 DNS
43	customer.io	2,390	$460K+	Google Workspace Meta Business Suite Sentry Anthropic Mailchimp
44	akstat.io	2,415	$45+	Proofpoint Akamai Technologies DNS
45	home-assistant.io	2,451	$22.78K+	Zendesk Google Search Console Meta Business Suite Cloudflare Prism
46	onetrust.io	2,467	$1.91K+	Cloudflare DNS
47	ogury.io	2,530	$8.36K+	Google Analytics Mandrill Gandi DNS WPPlugins/sitepress-multilingual-cms Mailchimp
48	connectad.io	2,538	$26.6K+	Salient Child Cloudflare DMARC Flickity Microsoft 365 Anthropic
49	aditude.io	2,540	$17.78K+	Apple Business Manager Framer Amazon Web Services Google Search Console Anthropic
50	huntress.io	2,572	$187K+	Monday.com Ruby on Rails Google Analytics Atlassian Amazon Route 53 DNS

This is 50 of 1,004,312 websites in .io. Filter the full index by stack, keyword and location, then export it as CSV.

Download the full list

Language usage on .io websites

by websites

01 English 284,751 89.7%
02 German 6,180 1.9%
03 French 6,038 1.9%
04 Spanish 5,138 1.6%
05 Vietnamese 4,036 1.3%
06 Portuguese 2,610 0.8%
07 Chinese 1,843 0.6%
08 Russian 1,667 0.5%
09 Other 5,200 1.6%

Top 25 companies using a .io domain (out of 159,872)

by verified headcount

Company	Website	Founded	Employees	City/Location
Americanas S.a.	carreiras.americanas.io	1929	10,001+	Rio de Janeiro
Meesho	meesho.io	2015	10,001+	Bangalore
Own A Small Business	tronbaba.io	2018	5,001-10,000	Nottingham
Coca-Cola Andina Brasil	koandina.gupy.io	1946	5,001-10,000	Rio de Janeiro
Varias	varias.io	2019	5,001-10,000	Rotterdam
PDS Health	spklr.io	1994	5,001-10,000	Henderson
Casa & Video	casaevideo.gupy.io	2009	5,001-10,000	Rio de Janeiro
Barbershop	barbershop.io	2015	1,001-5,000	Denver
Astronomer	astronomer.io	2018	1,001-5,000	New York
Sem Parar	semparar.gupy.io	-	1,001-5,000	São Paulo
UNKNOWN	weareunknown.io	2018	1,001-5,000	London
Caedu	caedu.gupy.io	1975	1,001-5,000	São Paulo
Umowa	umowa.io	-	1,001-5,000	Bialystok
Confidencial.io	confidencial.io	2021	1,001-5,000	Menlo Park
Grupo Ri Happy	gruporihappy.gupy.io	1988	1,001-5,000	São Paulo
Actionline	actionline.io	1999	1,001-5,000	São Paulo
Promod	promodjob.talentview.io	1975	1,001-5,000	Marcq-en-Baroeul
CAI	cai.io	1981	1,001-5,000	Allentown
Manager	manager.io	2011	1,001-5,000	Sydney
Dialectica	dialectica.io	2015	1,001-5,000	London
Gong	gong.io	2015	1,001-5,000	San Francisco
1% Club	onepercentclub.io	2022	1,001-5,000	Mumbai
Easygo	easygo.io	2016	1,001-5,000	Melbourne
JUSPAY	juspay.io	2012	1,001-5,000	Global
ASEE	asee.io	2007	1,001-5,000	Warsaw

Companies using .io domains by industry

top 12

01 computer software 29,709 26.4%
02 information technology and services 25,272 22.4%
03 Technology, Information and Internet 15,767 14%
04 marketing and advertising 11,725 10.4%
05 Financial Services 7,278 6.5%
06 management consulting 6,511 5.8%
07 internet 4,430 3.9%
08 computer & network security 2,576 2.3%
09 Design 2,488 2.2%
10 Computer Games 2,438 2.2%
11 Technology, Information and Media 2,255 2%
12 Blockchain Services 2,202 2%

Companies using .io by employee count

99.4K companies

Most used technologies on .io websites

by websites

#	Technology	Category	Websites
01	Cloudflare	Hosting & Infrastructure	258,361
02	Amazon Web Services (AWS)	Hosting & Infrastructure	224,156
03	Google Search Console	Marketing & SEO	176,131
04	GoDaddy	Hosting & Infrastructure	159,600
05	Namecheap DNS	DNS Services	90,733
06	React	Marketing & SEO	57,429
07	Afternic DNS	DNS Services	51,385
08	WordPress	Content Management	50,433
09	GoDaddy DMARC	MX & Email Hosting Services	46,930
10	Microsoft 365	Business Operations	44,757
11	Vercel	Hosting & Infrastructure	42,020
12	Next Js	Software Development	41,660
13	Google Domains DNS	DNS Services	41,036
14	Outlook for business	MX & Email Hosting Services	40,908
15	Hostinger	Hosting & Infrastructure	37,062