How does PageSourceSearch know what relay.dev is built with?

From the site's own source code. The crawler stores the exact bytes of its pages and first-party scripts; the libraries are recognised by fingerprinting that code against known releases, the identifiers are read out of the tag snippets, and the third-party hosts are the script, iframe and stylesheet sources in the HTML and the absolute URLs inside the scripts. Nothing is inferred from headers or guessed.

How far back does the history of relay.dev go?

To the first crawl the timeline lists. Every crawl records what the site looked like; when a file's content changes, its earlier version stays viewable because the stored chunks are never deleted, only mapped. A crawl that finds a file unchanged adds no copy.

Can I see an older version of a script from relay.dev?

Yes. In the stored files list, every date under a file opens the version that was live at that crawl, with the same viewer as the current one. The raw bytes can be downloaded from there.

Which other websites use the same tracking IDs as relay.dev?

Each identifier links to its reverse lookup, the list of every site in the index whose source carries the same id: the sites one analytics property or tag manager container is shared across.

Site profile

relay.dev

Built with gtag, @clerk/ui 1.34.0, @inkeep/cxkit-js 0.5.119, google-analytics, @revenuecat/purchases-js-hybrid-mappings 19.3.1, artplayer-plugin-vast 1.0.0, @chainlink/cl-search-frontend 0.13.2, @cognigy/webchat 3.50.0. 5 pages and 203 stored files, last crawled 2026-10-02.

rank 418,207 8 libraries 1 identifier 77 third-party hosts 1 crawl open the site

Technologies and libraries

Recognised by fingerprinting the stored files and bundles against known releases; a version is the release the bytes match.

Library	Version	Seen
gtag		2026-10-02
@clerk/ui	1.34.0	2026-10-02
@inkeep/cxkit-js	0.5.119	2026-10-02
google-analytics		2026-10-02
@revenuecat/purchases-js-hybrid-mappings	19.3.1	2026-10-02
artplayer-plugin-vast	1.0.0	2026-10-02
@chainlink/cl-search-frontend	0.13.2	2026-10-02
@cognigy/webchat	3.50.0	2026-09-24

Tracking, tag and verification IDs

Public identifiers read out of the source. Each links to every other site in the index that carries the same one.

What	Value	Found in
Google Analytics 4 measurement id (Google)	G-DCSC7FDGL5	view source

Third-party hosts

Hosts outside relay.dev that its pages load scripts, frames or stylesheets from, and that its own scripts name in absolute URLs (connect). Each links to every site loading from the same host.

Host	Loaded as	Found in
api.github.com	connect	view source
artsy.github.io	connect	view source
babangsund.com	connect	view source
babeljs.io	connect	view source
bumped.com	connect	view source
cdn.jsdelivr.net	connect	view source
chrome.google.com	connect	view source
cirrus-ci.com	connect	view source
clubhouse.io	connect	view source
code.facebook.com	connect	view source
create-react-app.dev	connect	view source
developer.mozilla.org	connect	view source
developers.facebook.com	connect	view source
docs.npmjs.com	connect	view source
docusaurus.io	connect	view source
domonda.com	connect	view source
en.wikipedia.org	connect	view source
eslint.org	connect	view source
facebook.github.io	connect	view source
fb.workplace.com	connect	view source
fburl.com	connect	view source
felix-kling.de	connect	view source
flexport.com	connect	view source
friday.work	connect	view source
gigsmart.com	connect	view source
github.com	connect	view source
graphql.org	connect	view source
grats.capt.dev	connect	view source
internalfb.com	connect	view source
lattice.com	connect	view source
marketplace.visualstudio.com	connect	view source
medium.com	connect	view source
microsoft.github.io	connect	view source
mindworking.eu	connect	view source
mrtnzlml.com	connect	view source
my-image.url	connect	view source
nextjs.org	connect	view source
opensource.facebook.com	connect	view source
our.internmc.facebook.com	connect	view source
phabricator.internmc.facebook.com	connect	view source
react.dev	connect	view source
reactjs.org	connect	view source
rxjs-dev.firebaseapp.com	connect	view source
speakerdeck.com	connect	view source
spec.graphql.org	connect	view source
staticdocs.thefacebook.com	connect	view source
steepapp.com	connect	view source
swissdevjobs.ch	connect	view source
testing-library.com	connect	view source
twitter.com	connect	view source
up.com.au	connect	view source
webplatform.github.io	connect	view source
woovi.com	connect	view source
www.1stdibs.com	connect	view source
www.algolia.com	connect	view source
www.apollographql.com	connect	view source
www.atlassian.com	connect	view source
www.autoguru.com.au	connect	view source
www.butterflynetwork.com	connect	view source
www.coinbase.com	connect	view source
www.facebook.com	connect	view source
www.google-analytics.com	script	view source
www.googletagmanager.com	script	view source
www.graphql-europe.org	connect	view source
www.habilelabs.io	connect	view source
www.internalfb.com	connect	view source
www.kiwi.com	connect	view source
www.m1finance.com	connect	view source
www.meetup.com	connect	view source
www.npmjs.com	connect	view source
www.oculus.com	connect	view source
www.parabol.co	connect	view source
www.rea-app.fr	connect	view source
www.surveymonkey.com	connect	view source
www.typescriptlang.org	connect	view source
www.w3.org	connect	view source
www.youtube-nocookie.com	connect	view source

Stored pages and scripts

The newest stored version of each file, newest first@if (p.FilesTruncated) { (the 500 newest of 203) }. Versions are the crawls at which the file was new or its content changed; each opens the file as it was then, rebuilt from the same stored chunks.

File	Kind	Size	Collected	Versions
https://relay.dev/assets/js/4e6784cc.91e150e1.js	js	11.6 KB	2026-10-02	current
https://www.google-analytics.com/analytics.js	js library	not fetched	2026-10-02	current
https://www.googletagmanager.com/gtag/js?id=G-DCSC7FDGL5	js library	not fetched	2026-10-02	current
https://relay.dev/assets/js/86d82d52.9b9afafe.js	js	31.2 KB	2026-10-02	current
https://relay.dev/assets/js/f2add319.89defa04.js	js	1.9 KB	2026-10-02	current
https://relay.dev/assets/js/6ece711f.9d9092ab.js	js	3.5 KB	2026-10-02	current
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Timeline

One entry per crawl, newest first, with what changed since the crawl before: libraries, identifiers, third-party hosts and files. Historical versions stay viewable because the stored chunks are shared between versions, never copied.

2026-10-02 first crawl

5 pages, 202 files, 5 MB; 7 libraries, 1 identifier, 77 third-party hosts
7 libraries added
- gtag
- @clerk/ui 1.34.0
- @revenuecat/purchases-js-hybrid-mappings 19.3.1
- @chainlink/cl-search-frontend 0.13.2
- @inkeep/cxkit-js 0.5.119
- artplayer-plugin-vast 1.0.0
- google-analytics
1 identifier added
- G-DCSC7FDGL5 Google Analytics 4 measurement id
77 third-party hosts added
202 files added
- https://relay.dev/ html
- https://relay.dev/blog/ html
- https://relay.dev/docs/ html
- https://relay.dev/help/ html
- https://relay.dev/docs/next/ html
- https://relay.dev/assets/js/runtime~main.d2b65a24.js js
- https://relay.dev/assets/js/main.e37c253f.js js
- https://relay.dev/assets/js/409e0132.b61414bb.js js
- https://relay.dev/assets/js/31fd58e5.e2067d81.js js
- https://relay.dev/assets/js/d629f92c.0299b31f.js js
- https://relay.dev/assets/js/88631a94.88dca452.js js
- https://relay.dev/assets/js/664c5043.69860e6e.js js
- and 190 more

Questions about relay.dev

How does PageSourceSearch know what relay.dev is built with?: From the site's own source code. The crawler stores the exact bytes of its pages and first-party scripts; the libraries are recognised by fingerprinting that code against known releases, the identifiers are read out of the tag snippets, and the third-party hosts are the script, iframe and stylesheet sources in the HTML and the absolute URLs inside the scripts. Nothing is inferred from headers or guessed.
How far back does the history of relay.dev go?: To the first crawl the timeline lists. Every crawl records what the site looked like; when a file's content changes, its earlier version stays viewable because the stored chunks are never deleted, only mapped. A crawl that finds a file unchanged adds no copy.
Can I see an older version of a script from relay.dev?: Yes. In the stored files list, every date under a file opens the version that was live at that crawl, with the same viewer as the current one. The raw bytes can be downloaded from there.
Which other websites use the same tracking IDs as relay.dev?: Each identifier links to its reverse lookup, the list of every site in the index whose source carries the same id: the sites one analytics property or tag manager container is shared across.

Look up another site, browse sites by tracking ID, third-party host or technology. Site owners: see the crawler page for how stored pages are removed.