Download list of all Flat UI sites

Name: Websites that use Flat UI
Creator: webatla
License: https://webatla.com/terms

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829 Sites detected

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Flat UI detection is a value inside the Technologies column. Two datasets carry it, switch between them to compare what's included.

webatla-technologies-flat-ui-2026-10-03.jsonl.zst · 829 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
univation.org	org	org	ICANN	HTTP 200	185.80.2.208	BG	{"youtube":["https://youtube.com/@univationinstitutfurevalua989"],"linkedin":["https://linkedin.com/company/univation-institut-fuer-evaluation"]}	2026-09-20	PHP, Drupal 11, HTTP/2, Strato, W3.CSS, jQuery, Favicon, Flat UI, hreflang, Bootstrap	0.000000114578	13,599,169	1999-12-21	2026-12-21
vbmuseum.org	org	org	ICANN	HTTP 200	141.193.213.10	US	{"youtube":["https://youtube.com/channel/UCBirR-OMZtklNDplMk5XM_A"],"facebook":["https://facebook.com/VeroBeachMuseumofArt","https://facebook.com/Vero-Beach-Museum-of-Art-257532611784"],"instagram":["https://instagram.com/verobeachmuseumofart"],"x-twitter":["https://twitter.com/VeroBeachMuseum"]}	2026-09-20	Google Analytics UA UA-120957325-1, PHP, RSS, Divi 4.27.9, MySQL, HTTP/3, jQuery, Favicon, Flat UI, GoDaddy	0.000000104855	16,544,345	2002-06-03	2027-06-03
artbabridgereport.org	org	org	ICANN	HTTP 200	18.211.103.254	US	{"facebook":["https://facebook.com/ARTBAssociation"],"linkedin":["https://linkedin.com/company/110745"],"x-twitter":["https://twitter.com/ARTBA"]}	2026-09-27	Google Analytics UA G-KVD6DY3L68 UA-6467000-21 +1, Google Tag Manager GTM-WD69Z88, Nginx, cdnjs, HTTP/2, jQuery 3.3.1, Favicon, Flat UI, YouTube, Bootstrap 3.3.5	0.0000000612587	13,598,886	2016-02-16	2027-02-16
arran.ru	ru	ru	ICANN	HTTP 200	94.141.252.195	RU	{"vk":["https://vk.com/public208029324"],"telegram":["https://t.me/archive_ras"]}	2026-09-27	PHP 8.1.27, Nginx 1.31.0, Drupal 10, W3.CSS, Favicon, Flat UI, Bootstrap, Google Workspace	0.0000000366198	13,934,427	2006-06-12	2027-06-12
amazingmail.com	com	com	ICANN	HTTP 200	23.99.89.174	US	{"facebook":["https://facebook.com/amazingmailcom"],"linkedin":["https://linkedin.com/company/54101"],"x-twitter":["https://twitter.com/Amazingmail"]}	2026-09-26	Google Analytics GA4 G-2LVCEZGWE2, IIS 10.0, Slick, HTTP/2, jQuery, Flat UI, FancyBox, LiveChat, Sendgrid, Bootstrap	0.0000000328162	13,502,582	1998-09-04	2028-09-03
…	…	…	…	…	…	…	…	…	…	…	…	…	…

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
univation.org	org	org	ICANN	HTTP 200	185.80.2.208	BG	{"youtube":["https://youtube.com/@univationinstitutfurevalua989"],"linkedin":["https://linkedin.com/company/univation-institut-fuer-evaluation"]}	2026-09-20	PHP, Drupal 11, HTTP/2, Strato, W3.CSS, jQuery, Favicon, Flat UI, hreflang, Bootstrap	2026-09-28	TRUE	{"A":["185.80.2.208"],"MX":[{"host":"smtpin.rzone.de","priority":5}],"NS":["docks01.rzone.de","shades07.rzone.de"],"SOA":{"mname":"shades07.rzone.de","retry":7200,"rname":"hostmaster.strato-rz.de","expire":604800,"serial":2020052146,"minimum":300,"refresh":86400},"TXT":["v=spf1 include:_spf.strato.com include:spf.qb-feedback.com ~all"]}	0.000000114578	13,599,169	2026-03-29	RDAP	1999-12-21	2026-12-21	2026-02-04	Cronon GmbH	{"raw_response":{"links":[{"rel":"related","href":"https://rdap.cronon.net/domain/univation.org","type":"application/rdap+json","value":"https://rdap.publicinterestregistry.org/rdap/domain/univation.org"},{"rel":"self","href":"https://rdap.publicinterestregistry.org/rdap/domain/univation.org","type":"application/rdap+json","value":"https://rdap.publicinterestregistry.org/rdap/domain/univation.org"}],"events":[{"eventDate":"2004-04-27T05:06:49.219Z","eventAction":"transfer"},{"eventDate":"2026-12-21T18:35:33Z","eventAction":"expiration"},{"eventDate":"1999-12-21T18:35:33.219Z","eventAction":"registration"},{"eventDate":"2026-02-04T18:35:46.638Z","eventAction":"last changed"},{"eventDate":"2026-03-29T20:32:16.819Z","eventAction":"last update of RDAP database"}],"status":["active"],"ldhName":"univation.org","notices":[{"links":[{"rel":"terms-of-service","href":"https://thenew.org/org-people/about-pir/policies/","type":"text/html","value":"https://rdap.publicinterestregistry.org/rdap/domain/univation.org"}],"title":"Terms of Service","description":["Public Interest Registry provides this RDAP service for informational purposes only, and to assist persons in obtaining information about or related to a domain name registration record. Public Interest Registry does not guarantee its accuracy. Users accessing the Public Interest Registry RDAP service agree to use the data only for lawful purposes, and under no circumstances may this data be used 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 registrar's own existing customers and b) enable high volume, automated, electronic processes that send queries or data to the systems of Public Interest Registry or any ICANN-accredited registrar, except as reasonably necessary to register domain names or modify existing registrations. When using the Public Interest Registry RDAP service, please consider the following: the RDAP service is not a replacement for standard EPP commands to the SRS service. RDAP is not considered authoritative for registered domain objects. The RDAP service may be scheduled for downtime during production or OT&E maintenance periods. Queries to the RDAP 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 RDAP service access. Abuse of the RDAP 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 RDAP 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 can be requested by submitting a request to WHOISrequest@pir.org. Public Interest Registry Inc. reserves the right to modify these terms at any time. By submitting this query, you agree to abide by this policy."]},{"links":[{"rel":"glossary","href":"https://icann.org/epp","type":"application/rdap+json","value":"https://rdap.publicinterestregistry.org/rdap/domain/univation.org"}],"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":"application/rdap+json","value":"https://rdap.publicinterestregistry.org/rdap/domain/univation.org"}],"title":"RDDS Inaccuracy Complaint Form","description":["URL of the ICANN RDDS Inaccuracy Complaint Form: https://icann.org/wicf"]}],"entities":[{"links":[{"rel":"self","href":"https://rdap.publicinterestregistry.org/rdap/entity/141","type":"application/rdap+json","value":"https://rdap.publicinterestregistry.org/rdap/entity/141"},{"rel":"about","href":"https://rdap.cronon.net","type":"application/rdap+json","value":"https://rdap.cronon.net"}],"roles":["registrar"],"handle":"141","entities":[{"roles":["abuse"],"vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text",""],["tel",{"type":"voice"},"uri","tel:+49.303980241"],["email",{},"text","abuse-domains@cronon.net"]]],"objectClassName":"entity"}],"publicIds":[{"type":"IANA Registrar ID","identifier":"141"}],"vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text","Cronon GmbH"]]],"objectClassName":"entity"}],"redacted":[{"name":{"type":"Registry Domain ID"},"method":"removal","prePath":"$.handle","pathLang":"jsonpath"}],"secureDNS":{"maxSigLife":1,"delegationSigned":false},"nameservers":[{"handle":"5f66d9cbe0474b3abf63a08d591c0566-LROR","status":["associated"],"ldhName":"docks01.rzone.de","unicodeName":"docks01.rzone.de","objectClassName":"nameserver"},{"handle":"34ff60cd70404c6b946c5763001af455-LROR","status":["associated"],"ldhName":"shades07.rzone.de","unicodeName":"shades07.rzone.de","objectClassName":"nameserver"}],"unicodeName":"univation.org","objectClassName":"domain","rdapConformance":["rdap_level_0","icann_rdap_response_profile_1","icann_rdap_technical_implementation_guide_1","redacted"]}}	Domain is active
vbmuseum.org	org	org	ICANN	HTTP 200	141.193.213.10	US	{"youtube":["https://youtube.com/channel/UCBirR-OMZtklNDplMk5XM_A"],"facebook":["https://facebook.com/VeroBeachMuseumofArt","https://facebook.com/Vero-Beach-Museum-of-Art-257532611784"],"instagram":["https://instagram.com/verobeachmuseumofart"],"x-twitter":["https://twitter.com/VeroBeachMuseum"]}	2026-09-20	Google Analytics UA UA-120957325-1, PHP, RSS, Divi 4.27.9, MySQL, HTTP/3, jQuery, Favicon, Flat UI, GoDaddy	2026-09-18	TRUE	{"A":["141.193.213.10"],"MX":[{"host":"vbmuseum-org.mail.protection.outlook.com","priority":0}],"NS":["ns11.domaincontrol.com","ns12.domaincontrol.com"],"SOA":{"mname":"ns11.domaincontrol.com","retry":7200,"rname":"dns.jomax.net","expire":604800,"serial":2025120801,"minimum":86400,"refresh":28800},"TXT":["WQ0MSOQAR68TLUCVQCD10MPRMHD5VSM8AYIIT15NH","v=spf1 a include:_spf.mlsend.com include:relay.mailchannels.net include:spf.protection.outlook.com ip4:35.188.214.201 ip4:50.250.100.193 ip4:99.12.244.177 -all"]}	0.000000104855	16,544,345	2025-06-22	RDAP	2002-06-03	2027-06-03	2025-06-22	GoDaddy.com, LLC	{"raw_response":{"links":[{"rel":"related","href":"https://rdap.godaddy.com/v1/domain/vbmuseum.org","type":"application/rdap+json","value":"https://rdap.godaddy.com/v1/domain/vbmuseum.org"},{"rel":"self","href":"https://rdap.publicinterestregistry.org/rdap/domain/vbmuseum.org","type":"application/rdap+json","value":"https://rdap.publicinterestregistry.org/rdap/domain/vbmuseum.org"}],"events":[{"eventDate":"2017-12-25T02:40:25.577Z","eventAction":"transfer"},{"eventDate":"2027-06-03T22:29:44Z","eventAction":"expiration"},{"eventDate":"2002-06-03T22:29:44.798Z","eventAction":"registration"},{"eventDate":"2024-07-21T23:23:30.31Z","eventAction":"last changed"},{"eventDate":"2025-06-22T01:59:35.228Z","eventAction":"last update of RDAP database"}],"handle":"a963c67a91894ba790c56352de3c8bdb-LROR","status":["client delete prohibited","client renew prohibited","client transfer prohibited","client update prohibited"],"ldhName":"vbmuseum.org","notices":[{"links":[{"rel":"alternate","href":"https://thenew.org/org-people/about-pir/policies/","type":"text/html","value":"https://rdap.publicinterestregistry.org/rdap/domain/vbmuseum.org"}],"title":"Terms of Service","description":["Public Interest Registry provides this RDAP service for informational purposes only, and to assist persons in obtaining information about or related to a domain name registration record. Public Interest Registry does not guarantee its accuracy. Users accessing the Public Interest Registry RDAP service agree to use the data only for lawful purposes, and under no circumstances may this data be used 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 registrar's own existing customers and b) enable high volume, automated, electronic processes that send queries or data to the systems of Public Interest Registry or any ICANN-accredited registrar, except as reasonably necessary to register domain names or modify existing registrations. When using the Public Interest Registry RDAP service, please consider the following: the RDAP service is not a replacement for standard EPP commands to the SRS service. RDAP is not considered authoritative for registered domain objects. The RDAP service may be scheduled for downtime during production or OT&E maintenance periods. Queries to the RDAP 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 RDAP service access. Abuse of the RDAP 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 RDAP 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 can be requested by submitting a request to WHOISrequest@pir.org. Public Interest Registry Inc. reserves the right to modify these terms at any time. By submitting this query, you agree to abide by this policy."]},{"links":[{"rel":"self","href":"https://icann.org/epp","type":"application/rdap+json","value":"https://icann.org/epp"}],"title":"Status Codes","description":["For more information on domain status codes, please visit https://icann.org/epp"]},{"links":[{"rel":"self","href":"https://icann.org/wicf","type":"application/rdap+json","value":"https://icann.org/wicf"}],"title":"RDDS Inaccuracy Complaint Form","description":["URL of the ICANN RDDS Inaccuracy Complaint Form: https://icann.org/wicf"]}],"entities":[{"roles":["registrant"],"events":[{"eventDate":"2025-06-22T01:59:35.228Z","eventAction":"last update of RDAP database"}],"remarks":[{"type":"object redacted due to authorization","title":"REDACTED","description":["Some of the data in this object has been removed."]}],"vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text",""],["org",{"type":"work"},"text","Domains By Proxy, LLC"],["adr",{"cc":"US"},"text",["","","","","Arizona","",""]]]],"objectClassName":"entity"},{"roles":["technical"],"events":[{"eventDate":"2025-06-22T01:59:35.228Z","eventAction":"last update of RDAP database"}],"remarks":[{"type":"object redacted due to authorization","title":"REDACTED","description":["Some of the data in this object has been removed."]}],"vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text",""]]],"objectClassName":"entity"},{"roles":["administrative"],"events":[{"eventDate":"2025-06-22T01:59:35.228Z","eventAction":"last update of RDAP database"}],"remarks":[{"type":"object redacted due to authorization","title":"REDACTED","description":["Some of the data in this object has been removed."]}],"vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text",""]]],"objectClassName":"entity"},{"links":[{"rel":"self","href":"https://rdap.publicinterestregistry.org/rdap/entity/146","type":"application/rdap+json","value":"https://rdap.publicinterestregistry.org/rdap/entity/146"}],"roles":["registrar"],"handle":"146","entities":[{"roles":["abuse"],"handle":"2e245ac341044535ad2f256defd5d975-LROR","vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text","Domains Abuse"],["tel",{"type":"voice"},"uri","tel:+1.4806242505"],["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"}],"publicIds":[{"type":"IANA Registrar ID","identifier":"146"}],"secureDNS":{"maxSigLife":1,"delegationSigned":false},"nameservers":[{"handle":"f0262e36bc4b40b7a6a218f8f5475f0b-LROR","status":["associated"],"ldhName":"ns11.domaincontrol.com","unicodeName":"ns11.domaincontrol.com","objectClassName":"nameserver"},{"handle":"dc2d5f135d0b4e78a4fa1daa0939447a-LROR","status":["associated"],"ldhName":"ns12.domaincontrol.com","unicodeName":"ns12.domaincontrol.com","objectClassName":"nameserver"}],"unicodeName":"vbmuseum.org","objectClassName":"domain","rdapConformance":["rdap_level_0","icann_rdap_response_profile_0","icann_rdap_technical_implementation_guide_0"]}}	Domain is active
artbabridgereport.org	org	org	ICANN	HTTP 200	18.211.103.254	US	{"facebook":["https://facebook.com/ARTBAssociation"],"linkedin":["https://linkedin.com/company/110745"],"x-twitter":["https://twitter.com/ARTBA"]}	2026-09-27	Google Analytics UA G-KVD6DY3L68 UA-6467000-21 +1, Google Tag Manager GTM-WD69Z88, Nginx, cdnjs, HTTP/2, jQuery 3.3.1, Favicon, Flat UI, YouTube, Bootstrap 3.3.5	2026-09-27	TRUE	{"A":["18.211.103.254"],"NS":["ns23.worldnic.com","ns24.worldnic.com"],"SOA":{"mname":"NS23.WORLDNIC.COM","retry":3600,"rname":"namehost.WORLDNIC.COM","expire":604800,"serial":122030711,"minimum":3600,"refresh":10800}}	0.0000000612587	13,598,886	2026-01-18	RDAP	2016-02-16	2027-02-16	2026-01-18	Network Solutions, LLC	{"raw_response":{"links":[{"rel":"related","href":"https://rdap.networksolutions.com/rdap/domain/artbabridgereport.org","type":"application/rdap+json","value":"https://rdap.publicinterestregistry.org/rdap/domain/artbabridgereport.org"},{"rel":"self","href":"https://rdap.publicinterestregistry.org/rdap/domain/artbabridgereport.org","type":"application/rdap+json","value":"https://rdap.publicinterestregistry.org/rdap/domain/artbabridgereport.org"}],"events":[{"eventDate":"2027-02-16T18:14:24.549Z","eventAction":"expiration"},{"eventDate":"2016-02-16T18:14:24.549Z","eventAction":"registration"},{"eventDate":"2025-12-23T07:08:46.889Z","eventAction":"last changed"},{"eventDate":"2026-01-18T06:05:51.73Z","eventAction":"last update of RDAP database"}],"status":["client transfer prohibited"],"ldhName":"artbabridgereport.org","notices":[{"links":[{"rel":"terms-of-service","href":"https://thenew.org/org-people/about-pir/policies/","type":"text/html","value":"https://rdap.publicinterestregistry.org/rdap/domain/artbabridgereport.org"}],"title":"Terms of Service","description":["Public Interest Registry provides this RDAP service for informational purposes only, and to assist persons in obtaining information about or related to a domain name registration record. Public Interest Registry does not guarantee its accuracy. Users accessing the Public Interest Registry RDAP service agree to use the data only for lawful purposes, and under no circumstances may this data be used 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 registrar's own existing customers and b) enable high volume, automated, electronic processes that send queries or data to the systems of Public Interest Registry or any ICANN-accredited registrar, except as reasonably necessary to register domain names or modify existing registrations. When using the Public Interest Registry RDAP service, please consider the following: the RDAP service is not a replacement for standard EPP commands to the SRS service. RDAP is not considered authoritative for registered domain objects. The RDAP service may be scheduled for downtime during production or OT&E maintenance periods. Queries to the RDAP 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 RDAP service access. Abuse of the RDAP 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 RDAP 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 can be requested by submitting a request to WHOISrequest@pir.org. Public Interest Registry Inc. reserves the right to modify these terms at any time. 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arran.ru	ru	ru	ICANN	HTTP 200	94.141.252.195	RU	{"vk":["https://vk.com/public208029324"],"telegram":["https://t.me/archive_ras"]}	2026-09-27	PHP 8.1.27, Nginx 1.31.0, Drupal 10, W3.CSS, Favicon, Flat UI, Bootstrap, Google Workspace	2026-10-02	TRUE	{"A":["94.141.252.195"],"MX":[{"host":"alt1.aspmx.l.google.com","priority":20},{"host":"alt2.aspmx.l.google.com","priority":20},{"host":"aspmx.l.google.com","priority":10},{"host":"aspmx2.googlemail.com","priority":30},{"host":"aspmx3.googlemail.com","priority":30},{"host":"aspmx4.googlemail.com","priority":30},{"host":"aspmx5.googlemail.com","priority":30}],"NS":["dns1.netbreeze.net","dns2.netbreeze.net","dns3.netbreeze.net"],"SOA":{"mname":"dns3.netbreeze.net","retry":3600,"rname":"info.netbreeze.net","expire":604800,"serial":2019120636,"minimum":86400,"refresh":10800}}	0.0000000366198	13,934,427	2026-06-11	WHOIS	2006-06-12	2027-06-12	2026-06-11	RU-CENTER-RU	{"raw_response":"% TCI Whois Service. Terms of use:\n% https://tcinet.ru/documents/whois_ru_rf.pdf (in Russian)\n% https://tcinet.ru/documents/whois_su.pdf (in Russian)\n\ndomain: ARRAN.RU\nnserver: dns1.netbreeze.net.\nnserver: dns2.netbreeze.net.\nnserver: dns3.netbreeze.net.\nstate: REGISTERED, DELEGATED, UNVERIFIED\norg: Science federal state budgetary institution Archive of the Russian Academy of Sciences\ntaxpayer-id: 7727028890\nregistrar: RU-CENTER-RU\nadmin-contact: https://www.nic.ru/whois\ncreated: 2006-06-12T20:00:00Z\npaid-till: 2027-06-12T21:00:00Z\nfree-date: 2027-07-14\nsource: TCI\n\nLast updated on 2026-06-11T00:08:01Z"}	Domain is active
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Showing 5 of 829 rows · Technologies · Full website tech stack per site: CMS, payments, analytics, frameworks.

↓ Download preview (20 rows, free) Buy Technologies — €159 / month

About Flat UI

Every visual era leaves a residue in the markup, and Flat UI is a clean example of one. Designmodo released the kit in 2013, at the point when the industry was abandoning gradients, bevels and drop shadows in favour of flat colour, and it packaged that aesthetic as a drop in extension to the CSS that people were already using alongside Bootstrap. Buttons, form controls, checkboxes, sliders and navigation, restyled and ready to paste.

What makes the fingerprint useful now is not the framework, which is small, but the timestamp attached to it. A stylesheet from that kit on a page still serving traffic in October 2026 means the design has not been revisited since the flat era, because nobody reaches for it when starting fresh today. The MIT terms mean copies were vendored into projects and left there, so the file often outlives the agency that put it in, the CMS around it and sometimes the business itself.

As of October 2026 we detect it on 829 sites. The right way to read the number is as an inventory of pages that have been stable for a long time. For a redesign agency that is a prospect list. For a security or compliance team it is a proxy for the rest of the page, because a front end frozen at that vintage normally sits on top of a plugin set, a script library and a server stack of the same age. For a researcher measuring how design conventions decay on the open web rather than in the trade press, it is a direct sample.

Detection works from file signatures and class names, and both are easy to lose. Anyone who concatenates and minifies stylesheets into one bundle drops out of the count, as does anyone who copied the parts they liked into their own stylesheet, which was a common way to use a kit like this. The count is therefore a floor. Loading a stylesheet is also not the same as using it, so presence tells you the file is served and not that any component on the page depends on it.

A lookup on a single domain confirms one site. The list answers the population questions, which are the ones that carry value here, such as how many of these pages still take payments, where they cluster by country code and top level domain, and how fast the cohort shrinks from release to release. A free kit never had a customer list to publish, so measuring the installed base from the outside is the only way to know it.

Frequently asked questions

How many websites use Flat UI?

webatla detects Flat UI on 829 websites, refreshed daily, each with its domain, DNS, WHOIS, IP, country and ranking.

Can I download the list of websites using Flat 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 Flat UI?

Buy the technology dataset, then download the complete list of domains we detect using Flat UI, re-exported every day.

What else is in the Flat UI technology data?

Each row places Flat UI next to the other technology on the same site, plus DNS, WHOIS, IP, country and ranking.

Can I download just the sites using Flat UI, or the whole database?

Both. Every site running Flat 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 Flat 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 Flat 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.