As of October 19, 2026 (UTC)
This page lists the most popular .io websites: every .io domain that made it into the NetAPI Top 1M, the free daily ranking of the one million most popular websites worldwide. The top 100 are shown below; the complete list of all 8,551 .io domains is available as a free CSV.
.io ranks #16 of 78 TLDs by presence in the Top 1M, with 8,551 domains (0.86% of the list).
# = position within .io; NetAPI rank = position in the full Top 1M (1 = most popular website on the Internet).
| # | Domain | NetAPI rank |
|---|---|---|
| 1 | h264.io | 72 |
| 2 | itch.io | 119 |
| 3 | astrumu.io | 137 |
| 4 | ssstik.io | 412 |
| 5 | cardgames.io | 498 |
| 6 | indown.io | 562 |
| 7 | rexporn.io | 832 |
| 8 | github.io | 856 |
| 9 | netcraze.io | 865 |
| 10 | pushy.io | 867 |
| 11 | wpguardian.io | 1,022 |
| 12 | sentry.io | 1,043 |
| 13 | readthedocs.io | 1,076 |
| 14 | adobe.io | 1,323 |
| 15 | trustindex.io | 1,418 |
| 16 | webflow.io | 1,714 |
| 17 | redis.io | 1,727 |
| 18 | jumpjump.io | 1,738 |
| 19 | branch.io | 1,870 |
| 20 | 1rx.io | 1,914 |
| 21 | complianz.io | 1,996 |
| 22 | gitbook.io | 2,065 |
| 23 | elevenlabs.io | 2,115 |
| 24 | pantheonsite.io | 2,137 |
| 25 | bidr.io | 2,164 |
| 26 | codepen.io | 2,174 |
| 27 | gohugo.io | 2,177 |
| 28 | pangle.io | 2,541 |
| 29 | lum-superproxy.io | 2,680 |
| 30 | kubernetes.io | 2,761 |
| 31 | gitlab.io | 2,780 |
| 32 | pendo.io | 2,909 |
| 33 | pxf.io | 3,071 |
| 34 | yellowblue.io | 3,104 |
| 35 | presage.io | 3,154 |
| 36 | superproxy.io | 3,184 |
| 37 | opensea.io | 3,277 |
| 38 | sourceforge.io | 3,310 |
| 39 | liftoff.io | 3,423 |
| 40 | termly.io | 3,444 |
| 41 | gitea.io | 3,456 |
| 42 | gofile.io | 3,493 |
| 43 | onetrust.io | 3,551 |
| 44 | osf.io | 3,580 |
| 45 | sjv.io | 3,662 |
| 46 | intercom.io | 3,882 |
| 47 | mediago.io | 3,918 |
| 48 | liftoff-creatives.io | 3,922 |
| 49 | guard.io | 4,147 |
| 50 | 5ch.io | 4,249 |
| 51 | envoyer.io | 4,292 |
| 52 | meduza.io | 4,368 |
| 53 | 4dex.io | 4,537 |
| 54 | zeta-ai.io | 4,572 |
| 55 | modelcontextprotocol.io | 4,634 |
| 56 | ipinfo.io | 4,823 |
| 57 | privacymanager.io | 5,176 |
| 58 | hentaimama.io | 5,246 |
| 59 | hentai20.io | 5,459 |
| 60 | topcinema.io | 5,590 |
| 61 | av-th.io | 5,675 |
| 62 | grofer.io | 5,682 |
| 63 | mastiraja.io | 5,701 |
| 64 | uakinogo.io | 5,819 |
| 65 | timewall.io | 5,856 |
| 66 | gwars.io | 5,900 |
| 67 | bidmachine.io | 6,062 |
| 68 | bpexch.io | 6,111 |
| 69 | filmyfly.io | 6,170 |
| 70 | kaliscan.io | 6,219 |
| 71 | segment.io | 6,517 |
| 72 | etherscan.io | 6,547 |
| 73 | sslip.io | 6,576 |
| 74 | gravitational.io | 6,641 |
| 75 | greenhouse.io | 6,711 |
| 76 | keybase.io | 6,971 |
| 77 | es.io | 7,072 |
| 78 | spring.io | 7,195 |
| 79 | devowl.io | 7,253 |
| 80 | n8n.io | 7,255 |
| 81 | home-assistant.io | 7,263 |
| 82 | 2ip.io | 7,285 |
| 83 | geo.io | 7,293 |
| 84 | hackmd.io | 7,311 |
| 85 | veed.io | 7,381 |
| 86 | grammarly.io | 7,491 |
| 87 | material.io | 7,536 |
| 88 | trezor.io | 7,606 |
| 89 | sanity.io | 7,659 |
| 90 | systeme.io | 7,763 |
| 91 | qt.io | 7,835 |
| 92 | jenkins.io | 7,857 |
| 93 | nexx360.io | 7,874 |
| 94 | metamask.io | 7,910 |
| 95 | gos-gsp.io | 7,956 |
| 96 | synthesia.io | 8,020 |
| 97 | azurecontainerapps.io | 8,032 |
| 98 | advolve.io | 8,073 |
| 99 | akstat.io | 8,105 |
| 100 | shinyapps.io | 8,147 |
Free CSV with all 8,551 .io domains from the Top 1M, most popular first (two columns: Rank, Domain). Regenerated daily together with the Top 1M.
Download CSV (all 8,551 .io domains)Published under CC BY 4.0: reuse freely, including commercially, with attribution to NetAPI and a link to https://netapi.com/.
The Top 1M covers only the most popular sites. All 1,468,084 registered .io domains, with DNS, server IP and WHOIS data, are available as daily updated domain lists and datasets.
Rank = position of the domain in the NetAPI Top 1M, which combines several public SEO / link-graph and traffic signals with reciprocal rank fusion so that no single source dominates. Domains are registrable domains (eTLD+1); a .io domain is any domain whose top-level domain is .io, regardless of where the site is hosted or who runs it.
The list is rebuilt every day; counts and ranks on this page refer to the current snapshot. The page exists for TLDs with at least 1,000 domains in the Top 1M.
See also the full NetAPI Top 1M list and the report Anatomy of the Top 1M.
.cn 13,789 .br 13,621 .fr 13,407 .in 11,567 .shop 10,160 .pl 8,784 .ca 8,140 .us 7,788 .co 7,155 .xyz 6,781 .au 6,663 .es 5,545