gumtree.com
Heading to gumtree.com? Heads up: it’ll track you. 35 companies follow visitors from here.
Privacy grade27 Oct 2026
F
Heavy tracking seen
0/100
- 6 tracking companies were seen loading before any choice was made
- 8 tracking companies were seen after we clicked reject
- The banner asked visitors to accept 952 ad-industry “partners”
- 35 cross-site tracking companies were seen after accepting
- Device-fingerprinting techniques seen (webgl)
Tracking companies seen35 can follow people across sites37
Seen before any choice6 can follow people across sites7
Cross-site trackers after rejectafter we clicked “Reject non-essential”8
Ad “partners” in the bannerconsent tool: OneTrust952
Countries data went to22 server locations12
Fingerprinting seenwebgl1
Where the data went
From our checker in London to 22 tracker server locations in 12 countries. Drag to spin.
- Advertising
- Session recording
- Analytics
- Data broker
- Social
- Our checker (London)
Server locations
Tap one to find it on the globe
Companies
Who showed up
- 01GGoogleAd network, analytics and search · Mountain View · servers in Dublin, Palo AltoAdvertisingBeforeAfter rejectAfter accept
- 02MMicrosoftAd network and analytics · Redmond · servers in Zurich, Seattle (South Lake Union)Session recordingBeforeAfter rejectAfter accept
- 03PPubMaticAd exchange · Redwood City · servers in Singapore, ParisAdvertisingBeforeAfter rejectAfter accept
- 04RRTB HouseRetargeting ad network · Warsaw · servers in London, AmsterdamAdvertisingBeforeAfter rejectAfter accept
- 05CComscoreAudience measurement · Reston · servers in DublinAnalyticsBeforeAfter rejectAfter accept
- 06IIndex ExchangeAd exchange · Toronto · servers in Montreal, Toronto (Old Toronto)AdvertisingBeforeAfter rejectAfter accept
- 07MMagniteAd exchange · Los Angeles · servers in Ashburn, AmsterdamAdvertisingBeforeAfter rejectAfter accept
- 08CCriteoRetargeting ad network · Paris · servers in Paris, GroningenAdvertisingBeforeAfter rejectAfter accept
- 09IID5Shared ad identity · London · servers in Montreal, RoubaixData brokerBeforeAfter rejectAfter accept
- 10LLotameData platform (data broker) · Columbia, MD · servers in Frankfurt am Main, DublinData brokerBeforeAfter rejectAfter accept
- 11YYahooAd network · New York · servers in Seattle (South Lake Union), LondonAdvertisingBeforeAfter rejectAfter accept
- 12AAdformAd platform · Copenhagen · servers in CopenhagenAdvertisingBeforeAfter rejectAfter accept
- 13AAdobeMarketing analytics and ad platform · San Jose · servers in Ashburn, LondonData brokerBeforeAfter rejectAfter accept
- 14AAmazon AdsAd network · Seattle · servers in Seattle (South Lake Union)AdvertisingBeforeAfter rejectAfter accept
- 15DDoubleVerifyAd verification · New York · servers in Boston, Kansas CityAdvertisingBeforeAfter rejectAfter accept
- 16EEpsilonMarketing data (data broker) · Irving, TX · servers in Frankfurt am MainData brokerBeforeAfter rejectAfter accept
- 17EEquativAd exchange · Paris · servers in Amsterdam, GroningenAdvertisingBeforeAfter rejectAfter accept
- 18EExperianCredit bureau and identity data · Dublin · servers in Kansas CityData brokerBeforeAfter rejectAfter accept
- 19GGumGumContextual ads · Santa Monica · servers in DublinAdvertisingBeforeAfter rejectAfter accept
- 20LLinkedInProfessional network and ad platform · Sunnyvale · servers in LondonAdvertisingBeforeAfter rejectAfter accept
- 21LLiveRampIdentity graph (data broker) · San Francisco · servers in Kansas City, Seattle (South Lake Union)Data brokerBeforeAfter rejectAfter accept
- 22MMedia.netContextual ads · Dubai · servers in Kansas CityAdvertisingBeforeAfter rejectAfter accept
- 23MMediavinePublisher ad network · Boca Raton · servers in Frankfurt am MainAdvertisingBeforeAfter rejectAfter accept
- 24MMetaSocial network and ad platform · Menlo Park · servers in DublinSocialBeforeAfter rejectAfter accept
- 25NNexxenVideo ads · London · servers in AshburnAdvertisingBeforeAfter rejectAfter accept
- 26OOpenXAd exchange · Pasadena · servers in Kansas CityAdvertisingBeforeAfter rejectAfter accept
- 27PPermutiveAudience data for publishers · London · servers in London, Kansas CityData brokerBeforeAfter rejectAfter accept
- 28QQuantcastAudience data and ads · San Francisco · servers in AshburnAdvertisingBeforeAfter rejectAfter accept
- 29SSeedtagContextual ads · Madrid · servers in Kansas CityAdvertisingBeforeAfter rejectAfter accept
- 30SShareThisShare buttons and audience data · Palo Alto · servers in DublinSocialBeforeAfter rejectAfter accept
- 31SSovrnAd exchange · Boulder · servers in DublinAdvertisingBeforeAfter rejectAfter accept
- 32TTaboolaContent recommendation ads · New York · servers in Petah TikvaAdvertisingBeforeAfter rejectAfter accept
- 33TTeadsContent recommendation and video ads · New York · servers in Chicago, LondonAdvertisingBeforeAfter rejectAfter accept
- 34TThe Trade DeskAd buying platform and identity (UID2) · Ventura · servers in Seattle (South Lake Union)AdvertisingBeforeAfter rejectAfter accept
- 35TTikTokSocial network and ad platform · Singapore · servers in Seattle (South Lake Union)AdvertisingBeforeAfter rejectAfter accept
- 36TTripleLiftAd exchange (native ads) · New York · servers in Frankfurt am MainAdvertisingBeforeAfter rejectAfter accept
- 37CCloudflare Web AnalyticsWeb analytics (cookieless) · San Francisco · servers in MontrealAnalyticsBeforeAfter rejectAfter accept
From our last check on 27 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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