Top-level domain
.io
74 measured sites. 6 of them, 8.1%, block at least one answer-surface AI crawler. Mean readiness score 68.
Compare against every other top-level domain
| Rank | Domain | Score | Answer-surface crawlers | Stack |
|---|---|---|---|---|
| 118 | github.io | Score 57 out of 100, grade D | all allowed | Fastly |
| 178 | adobe.io | Score 64 out of 100, grade C | all allowed | Fastly |
| 234 | oxylabs.io | Score 76 out of 100, grade B | all allowed | Next.js . Cloudflare |
| 365 | ioref.io | Not scored | all allowed | unidentified |
| 422 | pangle.io | Not scored | all allowed | unidentified |
| 547 | ipinfo.io | Score 79 out of 100, grade B | all allowed | Next.js . Google Cloud / GFE |
| 640 | branch.io | Score 95 out of 100, grade A | all allowed | WordPress . Cloudflare |
| 644 | pushy.io | Score 53 out of 100, grade D | all allowed | unidentified |
| 664 | intercom.io | Score 95 out of 100, grade A | all allowed | Sanity . Amazon CloudFront |
| 721 | itch.iorefused GPTBot | Score 69 out of 100, grade C | all allowed | Cloudflare |
| 739 | bidr.io | Not scored | all allowed | unidentified |
| 747 | wpguardian.io | Score 72 out of 100, grade C | all allowed | WordPress . Cloudflare |
| 755 | gofin.io | Not scored | all allowed | unidentified |
| 806 | grammarly.io | Not scored | all allowed | unidentified |
| 809 | liftoff.io | Score 78 out of 100, grade B | all allowed | HubSpot CMS . Cloudflare |
| 844 | furycloud.io | Not scored | all allowed | unidentified |
| 858 | yellowblue.io | Not scored | all allowed | unidentified |
| 903 | readthedocs.iorefused GPTBot | Score 49 out of 100, grade D | all allowed | Cloudflare |
| 945 | docker.io | Score 83 out of 100, grade B | all allowed | WordPress . Fastly |
| 949 | agora.io | Score 72 out of 100, grade C | all allowed | HubSpot CMS . Cloudflare |
| 966 | presage.io | Not scored | all allowed | unidentified |
| 1022 | keenetic.io | Not scored | all allowed | unidentified |
| 1042 | nic.io | Score 59 out of 100, grade D | all allowed | unidentified |
| 1046 | bidmachine.iorefused GPTBot | Score 54 out of 100, grade D | all allowed | Webflow . Cloudflare |
| 1048 | pendo.io | Score 95 out of 100, grade A | all allowed | Next.js . Vercel |
| 1097 | split.io | Score 61 out of 100, grade C | all allowed | Cloudflare |
| 1110 | netcraze.io | Score 7 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 1119 | statuspage.io | Score 63 out of 100, grade C | all allowed | Amazon CloudFront |
| 1191 | tubi.io | Not scored | all allowed | unidentified |
| 1293 | h264.io | Not scored | all allowed | unidentified |
| 1346 | 0xrpc.io | Score 53 out of 100, grade D | all allowed | Fastly |
| 1399 | cardgames.io | Score 56 out of 100, grade D | all allowed | Amazon CloudFront |
| 1467 | ssstik.io | Score 79 out of 100, grade B | all allowed | Cloudflare |
| 1681 | indown.iorefused GPTBot | Score 100 out of 100, grade A, partial assessment | all allowed | Cloudflare |
| 1919 | litix.io | Not scored | all allowed | unidentified |
| 1972 | sslip.io | Score 53 out of 100, grade D | all allowed | unidentified |
| 2099 | privacymanager.io | Score 83 out of 100, grade B | all allowed | Cloudflare |
| 2140 | adobestats.io | Not scored | all allowed | unidentified |
| 2183 | mediago.io | Score 56 out of 100, grade D | all allowed | Nuxt . Amazon CloudFront |
| 2192 | metamask.io | Score 87 out of 100, grade B | all allowed | Contentful . Cloudflare |
| 2202 | shodan.iorefused GPTBot | Score 83 out of 100, grade B, partial assessment | all allowed | Cloudflare |
| 2263 | liftoff-creatives.io | Not scored | all allowed | unidentified |
| 2285 | gos-gsp.io | Not scored | all allowed | unidentified |
| 2329 | customer.io | Score 83 out of 100, grade B | all allowed | Sanity . Vercel |
| 2344 | onetrust.io | Not scored | all allowed | unidentified |
| 2451 | akstat.io | Not scored | all allowed | unidentified |
| 2506 | home-assistant.io | Score 67 out of 100, grade C | all allowed | Cloudflare |
| 2520 | nip.io | Score 56 out of 100, grade D | all allowed | unidentified |
| 2565 | ogury.io | Score 83 out of 100, grade B | all allowed | WordPress . Cloudflare |
| 2597 | scopely.io | Not scored | all allowed | unidentified |
| 2645 | pxf.io | Score 7 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 2654 | aditude.io | Score 67 out of 100, grade C | all allowed | Framer |
| 2655 | trustindex.io | Score 75 out of 100, grade B | all allowed | WordPress . Amazon CloudFront |
| 2697 | redis.io | Score 91 out of 100, grade A | all allowed | Sanity . Cloudflare |
| 2706 | ikarem.io | Not scored | all allowed | unidentified |
| 2756 | huntress.io | Score 7 out of 100, grade F, partial assessment | 11 blocked | unidentified |
| 2813 | eqtv.io | Not scored | all allowed | unidentified |
| 2893 | snapcraft.io | Score 71 out of 100, grade C | all allowed | unidentified |
| 2923 | webflow.io | Score 72 out of 100, grade C | all allowed | Webflow . Cloudflare |
| 3025 | logitech.io | Not scored | all allowed | unidentified |
| 3104 | merkle.io | Score 56 out of 100, grade D | all allowed | Next.js . Cloudflare |
| 3159 | sjv.io | Not scored | all allowed | unidentified |
| 3211 | guard.io | Score 75 out of 100, grade B | all allowed | Cloudflare |
| 3219 | hotjar.io | Not scored | all allowed | unidentified |
| 3222 | azurecontainerapps.io | Score 60 out of 100, grade C | all allowed | Adobe Experience Manager . Azure Front Door |
| 3268 | vwapps.io | Not scored | all allowed | unidentified |
| 3337 | gitbook.io | Score 69 out of 100, grade C | all allowed | HubSpot CMS . Cloudflare |
| 3361 | found.io | Not scored | all allowed | unidentified |
| 3391 | mrf.io | Not scored | all allowed | unidentified |
| 3470 | siteimproveanalytics.io | Not scored | all allowed | unidentified |
| 3549 | es.io | Not scored | all allowed | unidentified |
| 3718 | nexx360.io | Score 80 out of 100, grade B | all allowed | WordPress |
| 3756 | piano.io | Score 73 out of 100, grade C | all allowed | Framer . Cloudflare |
| 3789 | plausible.io | Score 68 out of 100, grade C | all allowed | Bunny |
| 3813 | shopee.io | Not scored | all allowed | unidentified |
| 3844 | clarium.io | Not scored | all allowed | unidentified |
| 3864 | codepen.iorefused GPTBot | Score 55 out of 100, grade D, partial assessment | 5 blocked | Cloudflare |
| 3881 | avs.io | Score 70 out of 100, grade C | all allowed | Amazon CloudFront |
| 3890 | elevenlabs.io | Score 91 out of 100, grade A | all allowed | Next.js . Google Cloud / GFE |
| 3899 | connectad.io | Score 59 out of 100, grade D | all allowed | HubSpot CMS . Cloudflare |
| 3900 | complianz.io | Score 92 out of 100, grade A | all allowed | HubSpot CMS . Cloudflare |
| 3905 | advolve.io | Score 45 out of 100, grade D | all allowed | unidentified |
| 3938 | netbird.io | Score 67 out of 100, grade C | all allowed | Next.js . Vercel |
| 3999 | zenledger.iorefused GPTBot | Score 57 out of 100, grade D | 5 blocked | WordPress . Cloudflare |
| 4004 | pantheonsite.io | Not scored | all allowed | unidentified |
| 4043 | nextdns.io | Score 56 out of 100, grade D | all allowed | Next.js . Cloudflare |
| 4132 | rapidedge.io | Not scored | all allowed | unidentified |
| 4157 | growthbook.io | Score 83 out of 100, grade B | all allowed | HubSpot CMS . Cloudflare |
| 4193 | instana.io | Not scored | all allowed | unidentified |
| 4223 | termly.io | Score 91 out of 100, grade A | all allowed | WordPress . Cloudflare |
| 4241 | sanity.io | Score 79 out of 100, grade B | all allowed | Sanity . Vercel |
| 4325 | opensea.io | Score 67 out of 100, grade C | 5 blocked | Next.js . Cloudflare |
| 4326 | bitdrift.iorefused GPTBot | Score 57 out of 100, grade D | all allowed | Next.js . Amazon CloudFront |
| 4356 | zetaglobal.io | Not scored | all allowed | unidentified |
| 4372 | missena.io | Score 45 out of 100, grade D | all allowed | Amazon CloudFront |
| 4469 | gitlab.io | Score 67 out of 100, grade C | all allowed | Nuxt . Cloudflare |
| 4508 | greenhouse.io | Score 76 out of 100, grade B | all allowed | Cloudflare |
| 4511 | kandji.io | Score 75 out of 100, grade B | all allowed | HubSpot CMS . Cloudflare |
| 4533 | gohugo.io | Score 59 out of 100, grade D | all allowed | Netlify |
| 4546 | ably.io | Score 95 out of 100, grade A | all allowed | Gatsby . Cloudflare |
| 4740 | jumpjump.io | Score 48 out of 100, grade D | all allowed | Cloudflare |
| 4781 | karte.io | Score 59 out of 100, grade D | all allowed | Gatsby . Amazon CloudFront |
| 4804 | cloudx.io | Score 75 out of 100, grade B | all allowed | Next.js . Vercel |
| 4948 | ghcr.io | Score 59 out of 100, grade D | all allowed | Contentful |
| 5039 | lekton.io | Score 65 out of 100, grade C | all allowed | WordPress |
| 5106 | edgetcdn.io | Not scored | all allowed | unidentified |
| 5116 | webshare.io | Score 77 out of 100, grade B | all allowed | Cloudflare |
| -- | aireport.fidgetlabs.io | Score 88 out of 100, grade B | all allowed | Next.js . Vercel |
| -- | fidgetlabs.io | Score 87 out of 100, grade B | all allowed | Next.js . Vercel |
Using these figures
Free to reuse in research, journalism or a product under CC BY 4.0, with credit to Fidget Labs BV. Quote the measurement date so the claim stays checkable as the index moves.
CrawlIndex by Fidget Labs BV. "Agent readiness on .io." https://crawlindex.org (measured 2026-08-09). Licensed CC BY 4.0.