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 |
|---|
| #10,365 | complianz.io | 55 |
| #10,482 | datausa.io | 49 |
| #10,483 | playcode.io | 47 |
| #10,633 | etcd.io | 50 |
| #10,650 | httpie.io | 50 |
| #10,727 | taiga.io | 48 |
| #10,767 | pdfhost.io | 48 |
| #10,796 | dbeaver.io | 49 |
| #10,951 | c9.io | 49 |
| #10,960 | endel.io | 47 |
| #11,083 | snapcraft.io | 51 |
| #11,211 | osquery.io | 49 |
| #11,282 | fablabs.io | 47 |
| #11,386 | section.io | 47 |
| #11,416 | netty.io | 49 |
| #11,499 | expo.io | 49 |
| #11,526 | devdocs.io | 47 |
| #11,531 | readwise.io | 48 |
| #11,636 | geojson.io | 48 |
| #11,706 | appful.io | 47 |
| #11,723 | favicon.io | 48 |
| #11,724 | fluentbit.io | 49 |
| #11,843 | lightcast.io | 49 |
| #11,853 | temporal.io | 50 |
| #11,943 | spinnaker.io | 48 |
| #12,015 | borlabs.io | 54 |
| #12,174 | spatial.io | 49 |
| #12,178 | mailbutler.io | 48 |
| #12,249 | datahub.io | 48 |
| #12,319 | elai.io | 48 |
| #12,399 | planable.io | 49 |
| #12,411 | nip.io | 48 |
| #12,428 | futurepedia.io | 48 |
| #12,436 | facer.io | 47 |
| #12,451 | groups.io | 50 |
| #12,488 | claap.io | 47 |
| #12,492 | stitcher.io | 47 |
| #12,509 | opentracing.io | 49 |
| #12,682 | slidesai.io | 48 |
| #12,690 | apiary.io | 49 |
| #12,747 | tomorrow.io | 48 |
| #12,907 | kubevirt.io | 49 |
| #12,944 | weverse.io | 47 |
| #13,095 | subscribepage.io | 49 |
| #13,228 | skribbl.io | 49 |
| #13,304 | goauthentik.io | 49 |
| #13,307 | reactivex.io | 48 |
| #13,339 | keeper.io | 49 |
| #13,354 | smapply.io | 51 |
| #13,527 | misskey.io | 47 |
| #13,589 | scrapbox.io | 48 |
| #13,688 | gozen.io | 46 |
| #13,705 | spacy.io | 48 |
| #13,753 | mailerlite.io | 49 |
| #14,007 | thanos.io | 49 |
| #14,158 | gupy.io | 49 |
| #14,170 | prestodb.io | 48 |
| #14,191 | emplifi.io | 49 |
| #14,251 | growthbook.io | 48 |
| #14,351 | gitea.io | 49 |
| #14,381 | soracom.io | 48 |
| #14,419 | airframes.io | 50 |
| #14,433 | gate.io | 48 |
| #14,451 | bitsrc.io | 47 |
| #14,556 | moscowtimes.io | 50 |
| #14,621 | bitrise.io | 48 |
| #14,632 | id5.io | 50 |
| #14,807 | imgstore.io | 52 |
| #14,872 | cos.io | 48 |
| #14,888 | cryptorank.io | 46 |
| #14,989 | fd.io | 47 |
| #14,995 | deepbrain.io | 46 |
| #15,007 | nslookup.io | 47 |
| #15,153 | neuroimaging.io | 45 |
| #15,225 | coupler.io | 48 |
| #15,298 | coredns.io | 47 |
| #15,448 | bbhub.io | 48 |
| #15,621 | istio.io | 49 |
| #15,802 | blogseo.io | 45 |
| #15,971 | uxfol.io | 47 |
| #15,972 | filmmusic.io | 46 |
| #16,052 | axept.io | 49 |
| #16,115 | frontendmentor.io | 46 |
| #16,175 | rivery.io | 47 |
| #16,194 | visualping.io | 47 |
| #16,362 | moia.io | 45 |
| #16,444 | freeicons.io | 45 |
| #16,466 | clarify.io | 45 |
| #16,547 | sslip.io | 47 |
| #16,617 | elink.io | 46 |
| #16,770 | p3k.io | 46 |
| #16,973 | beefree.io | 47 |
| #17,036 | typeset.io | 46 |
| #17,037 | openuni.io | 49 |
| #17,056 | uiverse.io | 46 |
| #17,073 | rys.io | 49 |
| #17,159 | oopy.io | 47 |
| #17,244 | tigera.io | 47 |
| #17,289 | ambergroup.io | 47 |
| #17,377 | messari.io | 47 |