theguardian.com
Heavy tracking seen
40/100
- We didn’t find a reject button on the first screen of the cookie banner
- The banner asked visitors to accept 105 ad-industry “partners”
- 28 cross-site tracking companies were seen after accepting
Where the data went
From our checker in London to 19 tracker server locations in 10 countries. Drag to spin.
- Advertising
- Data broker
- Analytics
- Our checker (London)
Server locations
Tap one to find it on the globe
Companies
Who showed up
- 01AAdformAd platform · Copenhagen · servers in CopenhagenAdvertisingBeforeAfter accept
- 02AAdobeMarketing analytics and ad platform · San Jose · servers in Concord, AshburnAdvertisingBeforeAfter accept
- 03AAmazon AdsAd network · Seattle · servers in London, Seattle (South Lake Union)AdvertisingBeforeAfter accept
- 04CCriteoRetargeting ad network · Paris · servers in Paris, GroningenAdvertisingBeforeAfter accept
- 05EEpsilonMarketing data (data broker) · Irving, TX · servers in Frankfurt am MainData brokerBeforeAfter accept
- 06EEquativAd exchange · Paris · servers in Palo Alto, AmsterdamAdvertisingBeforeAfter accept
- 07GGoogleAd network, analytics and search · Mountain View · servers in Dublin, Palo AltoAdvertisingBeforeAfter accept
- 08GGumGumContextual ads · Santa Monica · servers in DublinAdvertisingBeforeAfter accept
- 09IID5Shared ad identity · London · servers in Montreal, RoubaixData brokerBeforeAfter accept
- 10IIndex ExchangeAd exchange · Toronto · servers in Montreal, Toronto (Old Toronto)AdvertisingBeforeAfter accept
- 11IIntegral Ad ScienceAd verification · New York · servers in Dublin, Seattle (South Lake Union)AdvertisingBeforeAfter accept
- 12LLinkedInProfessional network and ad platform · Sunnyvale · servers in LondonAdvertisingBeforeAfter accept
- 13LLiveRampIdentity graph (data broker) · San Francisco · servers in Kansas City, Seattle (South Lake Union)Data brokerBeforeAfter accept
- 14LLotameData platform (data broker) · Columbia, MD · servers in Frankfurt am Main, DublinData brokerBeforeAfter accept
- 15MMagniteAd exchange · Los Angeles · servers in Ashburn, AmsterdamAdvertisingBeforeAfter accept
- 16MMedia.netContextual ads · Dubai · servers in Kansas CityAdvertisingBeforeAfter accept
- 17MMicrosoftAd network and analytics · Redmond · servers in DublinAdvertisingBeforeAfter accept
- 18OOpenXAd exchange · Pasadena · servers in Kansas CityAdvertisingBeforeAfter accept
- 19PPermutiveAudience data for publishers · London · servers in London, Kansas CityData brokerBeforeAfter accept
- 20PPubMaticAd exchange · Redwood City · servers in London, SingaporeAdvertisingBeforeAfter accept
- 21QQuantcastAudience data and ads · San Francisco · servers in AshburnAdvertisingBeforeAfter accept
- 22RRTB HouseRetargeting ad network · Warsaw · servers in Kansas City, AmsterdamAdvertisingBeforeAfter accept
- 23SSeedtagContextual ads · Madrid · servers in Kansas CityAdvertisingBeforeAfter accept
- 24SSovrnAd exchange · Boulder · servers in Ashburn, DublinAdvertisingBeforeAfter accept
- 25TTeadsContent recommendation and video ads · New York · servers in Frankfurt am Main, ChicagoAdvertisingBeforeAfter accept
- 26TThe Trade DeskAd buying platform and identity (UID2) · Ventura · servers in Toronto (Old Toronto), Seattle (South Lake Union)AdvertisingBeforeAfter accept
- 27TTripleLiftAd exchange · New York · servers in Frankfurt am MainAdvertisingBeforeAfter accept
- 28YYahooAd network · New York · servers in Seattle (South Lake Union), LondonAdvertisingBeforeAfter accept
- 29CCloudflare Web AnalyticsWeb analytics (cookieless) · San Francisco · servers in MontrealAnalyticsBeforeAfter accept
- 30CComscoreAudience measurement · Reston · servers in DublinAnalyticsBeforeAfter accept
From our last check on 20 Oct 2026 from London: homepage only, three fresh visits (did nothing, clicked reject, clicked accept). Server locations are approximate, from the IP addresses we connected to. Some requests after rejecting may be strictly necessary services; this is what we observed, not proof that the site broke the law. How we check · Run this site? Ask for a re-check or add a statement
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