Download websites that use Headless UI
71,549 live sites using Headless UI right now
UI frameworks · by Tailwind Labs · since 2020 · open source
72K sites
Dataset updated · 2026-09-20
Categories
UI frameworks
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Requires a dataset purchase
All figures as of Sep 20, 2026
71,549
Sites detected
0.0%
Of all websites
Database preview of Headless UI sites
Headless UI detection is a value inside the Technologies column. Two datasets carry it, switch between them to compare what's included.
webatla-technologies-headless-ui-2026-09-20.jsonl.zst · 71,549 rows · 14 columns
Daily fresh export
| Domain | TLD suffix | TLD | Domain type | HTTP status | IP address | Country by IP | Social networks | Technologies last data checked | Technologies | PR value | Harmonic value | Domain creation date | Domain expiration date |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| data.gouv.fr | gouv.fr | fr | ICANN | HTTP 200 | 37.59.183.73 | FR | {"github":["https://github.com/datagouv/data.gouv.fr","https://github.com/opendatateam/udata","https://github.com/datagouv/cdata/commit/897a107"],"bluesky":["https://bsky.app/profile/datagouvfr.bsky.social"],"youtube":["https://youtube.com/@data-gouv-fr"],"linkedin":["https://linkedin.com/company/data-gouv-fr"]} | 2026-08-30 | HSTS, Nginx 1.30.1, HTTP/2, Sentry, Vue.js, Favicon, Node.js, Nuxt.js, Open Graph, Headless UI | 0.00000936233 | 17,131,148 | 2011-02-23 | 2026-12-06 |
| proton.me | me | me | ICANN | HTTP 200 | 185.70.42.45 | CH | {"reddit":["https://reddit.com/r/ProtonMail"],"tiktok":["https://tiktok.com/@privacytok"],"bluesky":["https://bsky.app/profile/proton.me"],"discord":["https://discord.gg/proton"],"threads":["https://threads.net/@protonprivacy"],"youtube":["https://youtube.com/@ProtonAG/playlists","https://youtube.com/@ProtonPrivacy/featured","https://youtube.com/@ProtonAG?sub_confirmation=1"],"facebook":["https://facebook.com/Proton"],"linkedin":["https://linkedin.com/company/protonprivacy"],"telegram":["https://t.me/proton_privacy"],"instagram":["https://instagram.com/protonprivacy"],"x-twitter":["https://x.com/intent/user?screen_name=ProtonPrivacy"]} | 2026-09-16 | PWA, HSTS, HTTP/2, PayPal, Algolia, Favicon, hreflang, Open Graph, Headless UI, Proton Mail | 0.00000773137 | 17,572,696 | 2010-10-10 | 2026-10-10 |
| fillout.com | com | com | ICANN | HTTP 200 | 76.76.21.21 | US | {"linkedin":["https://linkedin.com/company/fillout"],"x-twitter":["https://x.com/fillout"]} | 2026-09-02 | HSTS, HTTP/2, OpenAI, Vercel, HubSpot, Cloudflare, Open Graph, Headless UI, Priority Hints, Google Workspace | 0.00000689219 | 16,975,632 | 2001-05-31 | 2030-05-31 |
| tailwindcss.com | com | com | ICANN | HTTP 200 | 104.26.2.143 | US | {"github":["https://github.com/tailwindlabs/tailwindcss"],"x-twitter":["https://x.com/tailwindcss"]} | 2026-09-18 | PWA, RSS, HSTS, React, HTTP/2, Vercel, Favicon, Next.js, Node.js, Webpack | 0.00020013 | 18,774,778 | 2017-07-20 | 2032-07-20 |
| stanford.edu | edu | edu | ICANN | HTTP 200 | 171.67.215.200 | US | {"youtube":["https://youtube.com/stanford"],"facebook":["https://facebook.com/Stanford"],"linkedin":["https://linkedin.com/school/stanford-university"],"instagram":["https://instagram.com/stanford"],"x-twitter":["https://x.com/Stanford"]} | 2026-08-19 | HSTS, React, HTTP/2, Notion, OpenAI, Stripe, Favicon, Netlify, Next.js, Node.js | 0.0000679739 | 19,304,018 | 1985-10-04 | 2028-07-31 |
| … | … | … | … | … | … | … | … | … | … | … | … | … | … |
| Domain | TLD suffix | TLD | Domain type | HTTP status | IP address | Country by IP | Social networks | Technologies last data checked | Technologies | DNS last data checked | DNS Status | DNS records | PR value | Harmonic value | RDAP/WHOIS last data checked | RDAP/WHOIS method | Domain creation date | Domain expiration date | Domain last changed | Registrar | RDAP/WHOIS Record | Response Status RDAP/WHOIS |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| data.gouv.fr | gouv.fr | fr | ICANN | HTTP 200 | 37.59.183.73 | FR | {"github":["https://github.com/datagouv/data.gouv.fr","https://github.com/opendatateam/udata","https://github.com/datagouv/cdata/commit/897a107"],"bluesky":["https://bsky.app/profile/datagouvfr.bsky.social"],"youtube":["https://youtube.com/@data-gouv-fr"],"linkedin":["https://linkedin.com/company/data-gouv-fr"]} | 2026-08-30 | HSTS, Nginx 1.30.1, HTTP/2, Sentry, Vue.js, Favicon, Node.js, Nuxt.js, Open Graph, Headless UI | 2026-09-14 | TRUE | {"A":["37.59.183.73","37.59.183.91","37.59.183.92"],"MX":[{"host":"mx.ox.numerique.gouv.fr","priority":1}],"NS":["dns200.anycast.me","ns200.anycast.me"],"SOA":{"mname":"dns200.anycast.me","retry":3600,"rname":"tech.ovh.net","expire":3600000,"serial":2089409635,"minimum":300,"refresh":86400},"TXT":["HARICA-4B82HAT80k90ZhxbMFI","brevo-code:dd31dfeba26dea3dbb822aba4ec57417","google-site-verification=kd5n9r1Zcce-nubEuA7xt11I8NUeJy8u7TumXWr3Gj4","v=spf1 include:_spf.ox.numerique.gouv.fr include:spf.brevo.com include:_spf.crisp.email mx -all"]} | 0.00000936233 | 17,131,148 | 2025-12-06 | RDAP | 2011-02-23 | 2026-12-06 | 2025-12-06 | OVH | {"raw_response":{"links":[{"rel":"self","href":"https://rdap.nic.fr/domain/data.gouv.fr","value":"https://rdap.nic.fr/domain/data.gouv.fr"}],"events":[{"eventDate":"2011-02-23T11:20:19Z","eventAction":"registration"},{"eventDate":"2026-12-06T07:25:00Z","eventAction":"expiration"},{"eventDate":"2025-12-06T07:30:58.447499Z","eventAction":"last changed"},{"eventDate":"2025-12-06T13:14:05.01005444Z","eventAction":"last update of RDAP database"}],"handle":"DOM000002905102-FRNIC","status":["active","auto renew 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authorization","description":["The list of results does not contain all results due to lack of authorization.","This may indicate to some clients that proper authorization will yield a longer result set."]}],"entities":[{"links":[{"rel":"self","href":"https://rdap.nic.fr/entity/RAR939-FRNIC","value":"https://rdap.nic.fr/entity/RAR939-FRNIC"}],"roles":["registrar","sponsor"],"events":[{"eventDate":"2014-07-29T15:35:33Z","eventAction":"registration"},{"eventDate":"2022-10-12T18:54:01.785057Z","eventAction":"last changed"}],"handle":"RAR939-FRNIC","port43":"whois.nic.fr","status":["active"],"remarks":[{"type":"registrar restricted publication","description":["No"]}],"publicIds":[{"type":"IANA Registrar ID","identifier":"9999"}],"vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text","Registry 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set."]}],"entities":[{"links":[{"rel":"self","href":"https://rdap.nic.fr/entity/RAR939-FRNIC","value":"https://rdap.nic.fr/entity/RAR939-FRNIC"}],"roles":["registrar","sponsor"],"events":[{"eventDate":"2014-07-29T15:35:33Z","eventAction":"registration"},{"eventDate":"2022-10-12T18:54:01.785057Z","eventAction":"last changed"}],"handle":"RAR939-FRNIC","port43":"whois.nic.fr","status":["active"],"remarks":[{"type":"registrar restricted publication","description":["No"]}],"publicIds":[{"type":"IANA Registrar ID","identifier":"9999"}],"vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text","Registry Operations"],["tel",{"type":"voice"},"uri","tel:+33.139308300"],["tel",{"type":"fax"},"uri","tel:+33.139308301"],["email",{},"text","support@afnic.fr"],["url",{},"uri","https://www.afnic.fr"],["adr",{},"text",["","",["AFNIC","immeuble le Stephenson","1, rue Stephenson"],"Montigny-Le-Bretonneux","","78180","FR"]]]],"objectClassName":"entity"}],"ipAddresses":{},"objectClassName":"nameserver"}],"whoisStatus":"ACTIVE","objectClassName":"domain","rdapConformance":["rdap_level_0","icann_rdap_technical_implementation_guide_1","icann_rdap_response_profile_1"]}} | Domain is active |
| proton.me | me | me | ICANN | HTTP 200 | 185.70.42.45 | CH | {"reddit":["https://reddit.com/r/ProtonMail"],"tiktok":["https://tiktok.com/@privacytok"],"bluesky":["https://bsky.app/profile/proton.me"],"discord":["https://discord.gg/proton"],"threads":["https://threads.net/@protonprivacy"],"youtube":["https://youtube.com/@ProtonAG/playlists","https://youtube.com/@ProtonPrivacy/featured","https://youtube.com/@ProtonAG?sub_confirmation=1"],"facebook":["https://facebook.com/Proton"],"linkedin":["https://linkedin.com/company/protonprivacy"],"telegram":["https://t.me/proton_privacy"],"instagram":["https://instagram.com/protonprivacy"],"x-twitter":["https://x.com/intent/user?screen_name=ProtonPrivacy"]} | 2026-09-16 | PWA, HSTS, HTTP/2, PayPal, Algolia, Favicon, hreflang, Open Graph, Headless UI, Proton Mail | 2026-09-05 | TRUE | {"A":["185.70.42.45"],"DS":[{"digest":"0ebdded04fa7be35b5262d6b34f6a047b3105b15c2b69bc5544087d5b9d6e26b","key_tag":12382,"algorithm":8,"digest_type":2}],"MX":[{"host":"mail.protonmail.ch","priority":10},{"host":"mailsec.protonmail.ch","priority":20}],"NS":["ns1.proton.me","ns2.proton.me","ns3.proton.me"],"CAA":[{"tag":"issue","flags":0,"value":"letsencrypt.org"},{"tag":"issue","flags":0,"value":"sectigo.com"}],"SOA":{"mname":"ns1.proton.me","retry":144,"rname":"support.proton.me","expire":1814400,"serial":2026073330,"minimum":7200,"refresh":1200},"TXT":["google-site-verification=2FGIDo-Gf-lWE6t_gWd9gpPTehHD85hbNiEujPVgysc","google-site-verification=4UIZgETX8lGnv0WwpeJJbszo9daKOdXXYBKCA2XLf94","google-site-verification=MUjtKY-4uQAjE92Z2-s1nm9m4mvdqY2z6HCvi_Bj4so","google-site-verification=QviHfE1VQ57-tDmDLxM6BQH1mdgvdQ_0QsIvCht2IaU","google-site-verification=_ayl1WqWIag2WkIbK4sNg_x3NCT5nYOl_DgtFPTYKeg","linkedin-site-verification=01e79150-bf68-4e0c-ad04-822dc1015b3b","protonmail-verification=5262a92f988e64f1be1362138befdf1e19d6a4c1","v=spf1 include:_spf.protonmail.ch ~all","yandex-verification: 95a7888a0f987e6a","zoom-domain-verification=ZOOM_verify_5990c1fbb09d4c6aba062cded6cbdf06"],"DNSKEY":[{"flags":256,"protocol":3,"algorithm":8,"public_key":"AwEAAcWRrkoJqJhvJhoeoUlk7dUj4by2WK8fgCeSsL8qxMJ6Q+nyR9FE/yDEfI8y48CZpBmQE+kOxmq2LifappLnG7MebFhkGQpeHRxzkiMFYDnGxZ2k9gSNeMqhtw4GQouBGbZq1IZbo+hWH3sHnaoJPc5/nAbkV2PpUawZ8ZMc+0L4bJV916ThvI67BdtPggzsfAG46EEnMFOTmv288tFiCGXbPJPNX/LyTqwWmNYXU5XxblEQ6TzkFE/5P1i6neX7ke9PLeTsF9PJGftuirbtLY80Yq1KgyceLgICEaKd+UWkC5u4EXjdc+Tl39bP3gRzGhs5lSdmfrRiIO3X80ifz2c="},{"flags":257,"protocol":3,"algorithm":8,"public_key":"AwEAAbTBsAv0iLidN9T4BG9PTwMC5YcuVTgkLzXfH+nqyX5N3G/O3EhueazmAoC/eaKOHQnE3uubit3PggDRkNXcM6ifVfBYISblnB3uOSy6PtwTOzdRFz+UjzfUFnssIRr3da8XQL1q3lcE+hd+lO3E6YfQvJPsShcDdG0R8C+ZthZryW1859qEPItJLOATTDosHcVJYYA7nmPolUhhoifwRBwXm06V2fPNMtuvO1Q5oVxbJc16/5W4yCCwiT+SVO9NvIPAvv1TAFfwBZGcNCrYyiz5++NFlY6sYqrQrRiJWnWKBuXA1Nsh30OHPjG0jHWsPxD8yLeMb6EdLYTgkwJryac="}]} | 0.00000773137 | 17,572,696 | 2025-07-03 | WHOIS | 2010-10-10 | 2026-10-10 | 2024-09-13 | MarkMonitor Inc. | {"raw_response":"This domain is protected by the Registry Lock service. If you are the registrant and wish to take action on this lock, please contact your registrar.\r\n\r\nDomain Name: proton.me\r\nRegistry Domain ID: 38ee2177c6a048c8ab7619252aab3073-DONUTS\r\nRegistrar WHOIS Server: whois.markmonitor.com\r\nRegistrar URL: http://www.markmonitor.com\r\nUpdated Date: 2024-09-13T10:08:10Z\r\nCreation Date: 2010-10-10T21:20:51Z\r\nRegistry Expiry Date: 2026-10-10T21:20:51Z\r\nRegistrar: MarkMonitor Inc.\r\nRegistrar IANA ID: 292\r\nRegistrar Abuse Contact Email: abusecomplaints@markmonitor.com\r\nRegistrar Abuse Contact Phone: +1.2083895740\r\nDomain Status: clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited\r\nDomain Status: serverDeleteProhibited https://icann.org/epp#serverDeleteProhibited\r\nDomain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited\r\nDomain Status: serverTransferProhibited https://icann.org/epp#serverTransferProhibited\r\nDomain Status: clientUpdateProhibited https://icann.org/epp#clientUpdateProhibited\r\nDomain Status: serverUpdateProhibited https://icann.org/epp#serverUpdateProhibited\r\nRegistry Registrant ID: REDACTED\r\nRegistrant Name: REDACTED\r\nRegistrant Organization: Proton AG\r\nRegistrant Street: REDACTED\r\nRegistrant City: REDACTED\r\nRegistrant State/Province: Geneva\r\nRegistrant Postal Code: REDACTED\r\nRegistrant Country: CH\r\nRegistrant Phone: REDACTED\r\nRegistrant Phone Ext: REDACTED\r\nRegistrant Fax: REDACTED\r\nRegistrant Fax Ext: REDACTED\r\nRegistrant Email: REDACTED\r\nRegistry Admin ID: REDACTED\r\nAdmin Name: REDACTED\r\nAdmin Organization: REDACTED\r\nAdmin Street: REDACTED\r\nAdmin City: REDACTED\r\nAdmin State/Province: REDACTED\r\nAdmin Postal Code: REDACTED\r\nAdmin Country: REDACTED\r\nAdmin Phone: REDACTED\r\nAdmin Phone Ext: REDACTED\r\nAdmin Fax: REDACTED\r\nAdmin Fax Ext: REDACTED\r\nAdmin Email: REDACTED\r\nRegistry Tech ID: REDACTED\r\nTech Name: REDACTED\r\nTech Organization: REDACTED\r\nTech Street: REDACTED\r\nTech City: REDACTED\r\nTech State/Province: REDACTED\r\nTech Postal Code: REDACTED\r\nTech Country: REDACTED\r\nTech Phone: REDACTED\r\nTech Phone Ext: REDACTED\r\nTech Fax: REDACTED\r\nTech Fax Ext: REDACTED\r\nTech Email: REDACTED\r\nName Server: ns1.proton.me\r\nName Server: ns2.proton.me\r\nName Server: ns3.proton.me\r\nDNSSEC: signedDelegation\r\nURL of the ICANN Whois Inaccuracy Complaint Form: https://icann.org/wicf/\r\n>>> Last update of WHOIS database: 2025-07-03T18:08:47Z <<<\r\n\r\nFor more information on Whois status codes, please visit https://icann.org/epp\r\n\r\nTerms of Use: Access to WHOIS information is provided to assist persons in determining the contents of a domain name registration record in the registry database. The data in this record is provided by Identity Digital or the Registry Operator for informational purposes only, and accuracy is not guaranteed. This service is intended only for query-based access. You agree that you will use this data only for lawful purposes and that, under no circumstances will you use this data to (a) allow, enable, or otherwise support the transmission by e-mail, telephone, or facsimile of mass unsolicited, commercial advertising or solicitations to entities other than the data recipient's own existing customers; or (b) enable high volume, automated, electronic processes that send queries or data to the systems of Registry Operator, a Registrar, or Identity Digital except as reasonably necessary to register domain names or modify existing registrations. When using the Whois service, please consider the following: The Whois service is not a replacement for standard EPP commands to the SRS service. Whois is not considered authoritative for registered domain objects. The Whois service may be scheduled for downtime during production or OT&E maintenance periods. Queries to the Whois services are throttled. If too many queries are received from a single IP address within a specified time, the service will begin to reject further queries for a period of time to prevent disruption of Whois service access. Abuse of the Whois system through data mining is mitigated by detecting and limiting bulk query access from single sources. Where applicable, the presence of a [Non-Public Data] tag indicates that such data is not made publicly available due to applicable data privacy laws or requirements. Should you wish to contact the registrant, please refer to the Whois records available through the registrar URL listed above. Access to non-public data may be provided, upon request, where it can be reasonably confirmed that the requester holds a specific legitimate interest and a proper legal basis for accessing the withheld data. Access to this data provided by Identity Digital can be requested by submitting a request via the form found at https://www.identity.digital/about/policies/whois-layered-access/. The Registrar of Record identified in this output may have an RDDS service that can be queried for additional information on how to contact the Registrant, Admin, or Tech contact of the queried domain name. Identity Digital Inc. and Registry Operator reserve the right to modify these terms at any time. By submitting this query, you agree to abide by this policy.\r\n"} | Domain is active |
| fillout.com | com | com | ICANN | HTTP 200 | 76.76.21.21 | US | {"linkedin":["https://linkedin.com/company/fillout"],"x-twitter":["https://x.com/fillout"]} | 2026-09-02 | HSTS, HTTP/2, OpenAI, Vercel, HubSpot, Cloudflare, Open Graph, Headless UI, Priority Hints, Google Workspace | 2026-09-08 | TRUE | {"A":["76.76.21.21"],"MX":[{"host":"alt1.aspmx.l.google.com","priority":5},{"host":"alt2.aspmx.l.google.com","priority":5},{"host":"alt3.aspmx.l.google.com","priority":10},{"host":"alt4.aspmx.l.google.com","priority":10},{"host":"aspmx.l.google.com","priority":1},{"host":"cnadynzg5hl54v5uvpg3w7dtkdep3ndbsva4kvbvc2y2dnu6mjua.mx-verification.google.com","priority":15}],"NS":["nena.ns.cloudflare.com","reese.ns.cloudflare.com"],"SOA":{"mname":"nena.ns.cloudflare.com","retry":2400,"rname":"dns.cloudflare.com","expire":604800,"serial":2411426691,"minimum":1800,"refresh":10000},"TXT":["facebook-domain-verification=bb7jco1elb46g9f0xz32l5yy94bss0","google-site-verification=42eHSrtkD6jigKUsVNfg28mwsoo4giE5J9Zc7ILDzts","google-site-verification=E0A8Nybp195XtKvNu3xzUMj9tGGVQcVUNRaxobaeYmg","hubspot-developer-verification=ODA3YTAyOWQtNjhiYi00ZjIxLTg5MWMtZjVjODNhYjg0MzQ0","openai-domain-verification=dv-As4BDMDmXGwd7YfqhfWNDBj8","v=spf1 include:_spf.google.com ~all"]} | 0.00000689219 | 16,975,632 | 2026-05-22 | RDAP | 2001-05-31 | 2030-05-31 | 2026-01-12 | GoDaddy.com, LLC | {"raw_response":{"links":[{"rel":"self","href":"https://rdap.verisign.com/com/v1/domain/FILLOUT.COM","type":"application/rdap+json","value":"https://rdap.verisign.com/com/v1/domain/FILLOUT.COM"},{"rel":"related","href":"https://rdap.godaddy.com/v1/domain/FILLOUT.COM","type":"application/rdap+json","value":"https://rdap.godaddy.com/v1/domain/FILLOUT.COM"}],"events":[{"eventDate":"2001-05-31T10:31:49Z","eventAction":"registration"},{"eventDate":"2030-05-31T10:31:49Z","eventAction":"expiration"},{"eventDate":"2026-01-12T14:55:38Z","eventAction":"last changed"},{"eventDate":"2026-05-22T02:24:23Z","eventAction":"last update of RDAP database"}],"handle":"71591615_DOMAIN_COM-VRSN","status":["client delete prohibited","client renew prohibited","client transfer prohibited","client update prohibited"],"ldhName":"FILLOUT.COM","notices":[{"links":[{"rel":"terms-of-service","href":"https://www.verisign.com/domain-names/registration-data-access-protocol/terms-service/index.xhtml","type":"text/html","value":"https://rdap.verisign.com/com/v1/domain/fillout.com"}],"title":"Terms of Service","description":["Service subject to Terms of Use."]},{"links":[{"href":"https://icann.org/epp","type":"text/html"}],"title":"Status Codes","description":["For more information on domain status codes, please visit https://icann.org/epp"]},{"links":[{"rel":"help","href":"https://icann.org/wicf","type":"text/html","value":"https://rdap.verisign.com/com/v1/domain/fillout.com"}],"title":"RDDS Inaccuracy Complaint Form","description":["URL of the ICANN RDDS Inaccuracy Complaint Form: https://icann.org/wicf"]}],"entities":[{"links":[{"rel":"about","href":"http://www.godaddy.com","type":"text/html","value":"https://rdap.godaddy.com/v1/"}],"roles":["registrar"],"handle":"146","entities":[{"roles":["abuse"],"vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text",""],["tel",{"type":"voice"},"uri","tel:480-624-2505"],["email",{},"text","abuse@godaddy.com"]]],"objectClassName":"entity"}],"publicIds":[{"type":"IANA Registrar ID","identifier":"146"}],"vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text","GoDaddy.com, LLC"]]],"objectClassName":"entity"}],"secureDNS":{"delegationSigned":false},"nameservers":[{"ldhName":"NENA.NS.CLOUDFLARE.COM","objectClassName":"nameserver"},{"ldhName":"REESE.NS.CLOUDFLARE.COM","objectClassName":"nameserver"}],"objectClassName":"domain","rdapConformance":["rdap_level_0","icann_rdap_technical_implementation_guide_1","icann_rdap_response_profile_1"]}} | Domain is active |
| tailwindcss.com | com | com | ICANN | HTTP 200 | 104.26.2.143 | US | {"github":["https://github.com/tailwindlabs/tailwindcss"],"x-twitter":["https://x.com/tailwindcss"]} | 2026-09-18 | PWA, RSS, HSTS, React, HTTP/2, Vercel, Favicon, Next.js, Node.js, Webpack | 2026-09-17 | TRUE | {"A":["104.26.2.143","104.26.3.143","172.67.68.11"],"MX":[{"host":"in1-smtp.messagingengine.com","priority":10},{"host":"in2-smtp.messagingengine.com","priority":20}],"NS":["anuj.ns.cloudflare.com","roxy.ns.cloudflare.com"],"CAA":[{"tag":"issue","flags":0,"value":"comodoca.com"},{"tag":"issuewild","flags":0,"value":"comodoca.com"},{"tag":"issue","flags":0,"value":"digicert.com; cansignhttpexchanges=yes"},{"tag":"issuewild","flags":0,"value":"digicert.com; cansignhttpexchanges=yes"},{"tag":"issue","flags":0,"value":"letsencrypt.org"},{"tag":"issuewild","flags":0,"value":"letsencrypt.org"},{"tag":"issue","flags":0,"value":"pki.goog; cansignhttpexchanges=yes"},{"tag":"issuewild","flags":0,"value":"pki.goog; cansignhttpexchanges=yes"},{"tag":"issue","flags":0,"value":"ssl.com"},{"tag":"issuewild","flags":0,"value":"ssl.com"}],"SOA":{"mname":"anuj.ns.cloudflare.com","retry":2400,"rname":"dns.cloudflare.com","expire":604800,"serial":2414924938,"minimum":1800,"refresh":10000},"TXT":["v=spf1 include:spf.messagingengine.com include:helpscoutemail.com ?all"],"AAAA":["2606:4700:20::681a:28f","2606:4700:20::681a:38f","2606:4700:20::ac43:440b"],"HTTPS":[{"params":["alpn=h2","ipv4hint=104.26.2.143,104.26.3.143,172.67.68.11","ipv6hint=2606:4700:20::681a:28f,2606:4700:20::681a:38f,2606:4700:20::ac43:440b"],"target":"","priority":1}]} | 0.00020013 | 18,774,778 | 2025-07-07 | RDAP | 2017-07-20 | 2032-07-20 | 2025-07-07 | Tucows Domains Inc. | {"raw_response":{"links":[{"rel":"self","href":"https://rdap.verisign.com/com/v1/domain/TAILWINDCSS.COM","type":"application/rdap+json","value":"https://rdap.verisign.com/com/v1/domain/TAILWINDCSS.COM"},{"rel":"related","href":"https://opensrs.rdap.tucows.com/domain/TAILWINDCSS.COM","type":"application/rdap+json","value":"https://opensrs.rdap.tucows.com/domain/TAILWINDCSS.COM"}],"events":[{"eventDate":"2017-07-20T12:10:36Z","eventAction":"registration"},{"eventDate":"2032-07-20T12:10:36Z","eventAction":"expiration"},{"eventDate":"2023-01-05T19:28:42Z","eventAction":"last changed"},{"eventDate":"2025-07-07T05:13:06Z","eventAction":"last update of RDAP database"}],"handle":"2145020445_DOMAIN_COM-VRSN","status":["client transfer prohibited","client update prohibited"],"ldhName":"TAILWINDCSS.COM","notices":[{"links":[{"rel":"terms-of-service","href":"https://www.verisign.com/domain-names/registration-data-access-protocol/terms-service/index.xhtml","type":"text/html","value":"https://rdap.verisign.com/com/v1/domain/tailwindcss.com"}],"title":"Terms of Service","description":["Service subject to Terms of Use."]},{"links":[{"href":"https://icann.org/epp","type":"text/html"}],"title":"Status Codes","description":["For more information on domain status codes, please visit https://icann.org/epp"]},{"links":[{"rel":"help","href":"https://icann.org/wicf","type":"text/html","value":"https://rdap.verisign.com/com/v1/domain/tailwindcss.com"}],"title":"RDDS Inaccuracy Complaint Form","description":["URL of the ICANN RDDS Inaccuracy Complaint Form: https://icann.org/wicf"]}],"entities":[{"links":[{"rel":"about","href":"http://www.tucows.com","type":"text/html","value":"https://opensrs.rdap.tucows.com/"}],"roles":["registrar"],"handle":"69","entities":[{"roles":["abuse"],"vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text",""],["tel",{"type":"voice"},"uri","tel:+1.4165350123"],["email",{},"text","domainabuse@tucows.com"]]],"objectClassName":"entity"}],"publicIds":[{"type":"IANA Registrar ID","identifier":"69"}],"vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text","Tucows Domains Inc."]]],"objectClassName":"entity"}],"secureDNS":{"delegationSigned":false},"nameservers":[{"ldhName":"ANUJ.NS.CLOUDFLARE.COM","objectClassName":"nameserver"},{"ldhName":"ROXY.NS.CLOUDFLARE.COM","objectClassName":"nameserver"}],"objectClassName":"domain","rdapConformance":["rdap_level_0","icann_rdap_technical_implementation_guide_1","icann_rdap_response_profile_1"]}} | Domain is active |
| stanford.edu | edu | edu | ICANN | HTTP 200 | 171.67.215.200 | US | {"youtube":["https://youtube.com/stanford"],"facebook":["https://facebook.com/Stanford"],"linkedin":["https://linkedin.com/school/stanford-university"],"instagram":["https://instagram.com/stanford"],"x-twitter":["https://x.com/Stanford"]} | 2026-08-19 | HSTS, React, HTTP/2, Notion, OpenAI, Stripe, Favicon, Netlify, Next.js, Node.js | 2026-09-15 | TRUE | {"A":["171.67.215.200"],"DS":[{"digest":"a916f3471dc897d11720aefb8058c95ae5ba83572850013f22968b3c07ea8ac6","key_tag":6390,"algorithm":13,"digest_type":2}],"MX":[{"host":"mxa-00000d07.gslb.pphosted.com","priority":10},{"host":"mxb-00000d07.gslb.pphosted.com","priority":10}],"NS":["argus.stanford.edu","atalante.stanford.edu","avallone.stanford.edu","ns5.dnsmadeeasy.com","ns6.dnsmadeeasy.com","ns7.dnsmadeeasy.com"],"LOC":["37 25 38.962 N 122 10 12.970 W 0m 1m 10000m 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{"raw_response":"This Registry database contains ONLY .EDU domains.\nThe data in the EDUCAUSE Whois database is provided\nby EDUCAUSE for information purposes in order to\nassist in the process of obtaining information about\nor related to .edu domain registration records.\n\nThe EDUCAUSE Whois database is authoritative for the\n.EDU domain.\n\nA Web interface for the .EDU EDUCAUSE Whois Server is\navailable at: http://whois.educause.edu\n\nBy submitting a Whois query, you agree that this information\nwill not be used to allow, enable, or otherwise support\nthe transmission of unsolicited commercial advertising or\nsolicitations via e-mail. The use of electronic processes to\nharvest information from this server is generally prohibited\nexcept as reasonably necessary to register or modify .edu\ndomain names.\n\n-------------------------------------------------------------\n\nDomain Name: STANFORD.EDU\n\nRegistrant:\n\tStanford University\n\tThe Board of Trustees of the Leland Stanford Junior University\n\t241 Panama Street, Pine Hall, Room 115\n\tStanford, CA 94305-4122\n\tUSA\n\nAdministrative Contact:\n\tDomain Admin\n\tStanford University\n\t241 Panama Street Pine Hall, Room 115\n\tStanford, CA 94305-4122\n\tUSA\n\t+1.6507234328\n\tsunet-admin@stanford.edu\n\nTechnical Contact:\n\tDomain Admin\n\tStanford University\n\tThe Board of Trustees of the Leland Stanford Junior University\n\t241 Panama Street, Pine Hall, Room 115\n\tStanford, CA 94305-4122\n\tUSA\n\t+1.6507234328\n\tsunet-admin@stanford.edu\n\nName Servers:\n\tNS6.DNSMADEEASY.COM\n\tARGUS.STANFORD.EDU\n\tNS7.DNSMADEEASY.COM\n\tNS5.DNSMADEEASY.COM\n\tAVALLONE.STANFORD.EDU\n\tATALANTE.STANFORD.EDU\n\nDomain record activated: 04-Oct-1985\nDomain record last updated: 08-Jul-2025\nDomain expires: 31-Jul-2028\n\r\n"} | Domain is active |
| … | … | … | … | … | … | … | … | … | … | … | … | … | … | … | … | … | … | … | … | … | … | … |
Showing 5 of 71,549 rows · Technologies · Full website tech stack per site: CMS, payments, analytics, frameworks.
Headless UI sites by country
| Country | Sites | Share |
|---|---|---|
| 🇺🇸 United States | 58,165 | 85.5% |
| 🇩🇪 Germany | 3,426 | 5.0% |
| 🇬🇧 United Kingdom | 936 | 1.4% |
| 🇫🇷 France | 567 | 0.8% |
| 🇳🇱 Netherlands | 497 | 0.7% |
Headless UI sites by TLD
The Headless UI dataset
Every site we've detected as running Headless UI, with version, hosting, country, TLD and traffic rank.
Headless UI lives inside 2 datasets
Headless UI detection is part of Technologies (€159/mo) and All data (€599/mo). Buy either to filter the full 71,549-site list, or grab a free preview first.
About Headless UI
Component libraries usually announce themselves visually, through class names and a house style that show up wherever the library was used. Headless UI does the opposite, because it ships interaction behaviour and accessibility semantics with no styling at all.
The library provides dropdowns, dialogs, tabs, listboxes and disclosure panels that implement keyboard interaction and ARIA roles properly, and leaves every visual decision to the developer. Tailwind Labs builds it as the companion to their utility-first CSS framework, publishes it under MIT, and released it in 2020. A team reaching for it has already made a cluster of related choices: a component-driven front end in JavaScript, a build step, a design system expressed as utility classes, and enough concern for accessibility to prefer a library that gets focus management right over one that looks finished out of the box.
Detecting the library on a site is therefore a signal about the team, not about the business it belongs to. The site was built by developers working in a modern toolchain rather than assembled in a page builder, and somebody involved reads accessibility guidance. Vendors selling to those teams, meaning design system tooling, component testing, continuous integration, error monitoring, front-end hosting and accessibility audit services, get a qualification signal here that a general framework tag does not give them.
As of September 2026 we see it on 71,549 sites, with 58,165 resolving to United States and .com carrying more than any other suffix. Concentration that heavy is typical of libraries adopted through developer channels rather than through procurement or regional web shops. Part of the pattern is a fact about the technology and part of it is a fact about where the companies using it register and host, and the country column should be read with both in mind.
The unstyled design that makes the library useful also makes it hard to see. There are no distinctive visual classes to match, because the styling is whatever the developer wrote. We identify it from bundle contents, generated component attributes and the markup structures it produces, and a build that renames or strips those can pass unrecognised. The count belongs on the low side of the truth, and it is more likely to catch client-rendered applications than pages prerendered to flat markup.
A per-domain check tells you whether one site uses the library. The value of the full list is in the intersections. Hosts running this library and a particular framework, hosts running it beside a commercial component vendor you would like to replace, or the subset in one market that also runs a specific commerce platform. Intersections like those exist only once the whole detected population sits in a single file where you can filter it.
Frequently asked questions
How many websites use Headless UI?
webatla detects Headless UI on 72K websites, refreshed daily, each with its domain, DNS, WHOIS, IP, country and ranking.
Can I download the list of websites using Headless UI?
Yes, as structured JSONL. Grab a free sample first.
What's included for each site, and how fresh is it?
Domain, DNS, RDAP/WHOIS, the full technology stack, IP & country, PageRank and Harmonic, re-detected and re-exported daily.
How do I find the websites using Headless UI?
Buy the technology dataset, then download the complete list of domains we detect using Headless UI, re-exported every day.
What else is in the Headless UI technology data?
Each row places Headless UI next to the other technology on the same site, plus DNS, WHOIS, IP, country and ranking.
Can I download just the sites using Headless UI, or the whole database?
Both. Every site running Headless UI comes in the Technologies dataset, one downloadable file. Or buy All data for the entire database: technologies plus identity, ranking, DNS and RDAP/WHOIS for every domain, combined in one file. Daily fresh export.
How do I download the list of websites using Headless UI?
Three steps: (1) grab the free 10,000-row sample to inspect the schema, (2) buy the Technologies dataset, (3) download the full list of every domain we detect running Headless UI as a JSON Lines file. It is re-exported daily, so you can re-download the freshest list any time inside your access window. Each row carries the domain plus DNS, WHOIS, IP, hosting country and rank.
Get the full list of websites using Headless UI
Pick the dataset that covers what you need. Each one includes Headless UI and downloads as JSONL, rebuilt daily.
Technologies
14 columns
Full website tech stack per site: CMS, payments, analytics, frameworks.
€159 / mo
Buy and download
Download preview dataset
All data
23 columns
Everything we have, in a single package. The full webatla universe.
€599 / mo
Buy and download
Download preview dataset
Want to compare every dataset side by side? Visit the pricing page
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