Numerous companies track our movements online 
whenever we use any device on the internet. The following list of companies is not complete. Research into who these companies are and who they sell web behavior to, has yet to be determined.
Internet Spies
More updates will follow.
| [x+1] | Chitika | Mister Bell |
| 1sponsor | ChoiceStream | MLN |
| 33Across | CityAds | Moat |
| 4w Marketplace | Clearstream.TV | Mobicow |
| 888media | ClickBank | Mobify |
| A8 | ClickBank ProAds | mOcean Mobile |
| AccessTrade | Clickbooth | Monetize Me |
| Accord Group | ClickCertain | Mooxar |
| Accuen Media | ClickForce | MoPub |
| actionpay | ClicKing | moreAds |
| Active | ClickInText | MrSkinCash |
| activecore | Clickky | MyBuys |
| Acuity Ads | Clickonometrics | Nanigans |
| Acxiom | ClickpointE-mail | Nativo |
| Ad Butler | Clicksor | NCOL |
| Ad Decisive | Clickwinks | Neodata |
| Ad Dynamo | ClicManager | Net Avenir |
| Ad Magnet | Clip Syndicate | Net Communities |
| Ad Peeps | clixGalore | NetAffiliation |
| Ad Spirit | ClixSense | NetSeer |
| Ad.agio | Clove Network | NetShelter |
| ad.ru | COADVERTISE | Newtention |
| ad2games | Cobalt Group | Nexage |
| Ad360 | CoinURL | Nextclick |
| ad4game | Commission Junction | Nolix |
| ad4mat | comOn Group | nPlexMedia |
| ad4max | Complex Media Network | Nuffnang |
| ad6media | Conduit | Nugg.Ad |
| Adacado | Connexity | Numbate |
| AdAction | Connextra | OhanaNetwork |
| ADAOS | Contaxe | OMG |
| Adap.tv | ConvertMedia | Omnicom China |
| Adblade | Convertro | Onefeed |
| Adbooth | Conviva | OnScroll |
| AdBrite | Copacet | Open AdExchange |
| AdBuyer.com | Coull | OpenX |
| Adcash | CPM Rocket | Operative Media |
| AdCentric | CPMProfit | OptAim |
| AdChina | CPMStar | Optimax Media Delivery |
| Adcito | CPVAdvertise | Orange |
| AdClear | CPX Interactive | Orange142 |
| AdClickMedia | Crakmedia Network | otClick |
| AdCloud | CrankyAds | OwnerIQ |
| adcloud | Creafi | OxaMedia |
| AdConductor | Crimtan | Ozone Media |
| Adconion | CriteoSearch | Paid-To-Promote |
| Adcrowd | CrowdGather | PaperG |
| AdDynamics | CTnetwork | Partner-Ads |
| AddyON | CueLinks | Passionfruit |
| AdEasy | cXense | PayClick |
| AdEffective | Cyber Wing | Pay-Hit |
| AdEngage | Daisycon | Pepperjam |
| AdEspresso | Dashboard Ad | Perfect Audience |
| AdExcite | Datalogix | Perfect Market |
| AdExtent | DataMind | Perform Group |
| AdF.ly | DataXu | Performancing Metrics |
| AdFalcon | Dedicated Media | Pheedo |
| AdFocus | Deli Ads | Pilot |
| AdForGames | DemandMedia | Pirchio |
| AdForm | Developer Media | Pixel Media |
| AdFox | DEX Platform | PixFuture |
| adFreestyle | dgMatix | Piximedia |
| AdFrontiers | Dianomi | Placester |
| Adfunky | Digilant | Platform161 |
| Adfusion | Digital Impact | Play by Mamba |
| AdGear | Digitize | Plista |
| adGENIE | Direct Keyword Link | PlugRush |
| AdGent Digital | Direct/ADVERT | PocketCents |
| Adgile | DirectAvenue | PointRoll |
| adgoal | DirectREV | Polar Mobile |
| Adgorithms | DM2 | PolyAd |
| ADGoto | DotAndMedia | PopAds |
| AdHands | Double.net | Popcash |
| Adhese | DoubleClick | popIn |
| AdHitz | DoubleClick Bid Manager | PopOnClick |
| adhood | DoubleClick DART | Populis |
| Adify | DoublePimpOverlays | PowerLinks |
| Adimpact | Drawbridge | Precision Health Media |
| Adinch | Drip | PrecisionClick |
| adingo | DSNR Media Group | Predicta |
| AdInterax | Dstillery | PriceGrabber |
| Adition | DuraSite | Prisma Media Digital |
| Adjal | DynAd | Project Wonderful |
| AdJug | Dynamic Yield | Promodity |
| AdJuggler | eADV | PropelAd |
| adk2 | EasyAds | Propeller Ads |
| Adklik | eBay Korea | Prosperent |
| adklip | eBay Partner Network | ProvenPixel |
| Adknowledge | eBay Stats | Proximic |
| Adkontekst | eBuzzing | Pubdirecte |
| AdLabs | eClick | Pub-Fit |
| AdLand | ecotag | PubGears |
| AdLantic | Effiliation | Publicidad.net |
| AdLantis | elicit | Publir |
| Adlux | EMatch | PubMatic |
| ADMAN | Emediate | Puboclic |
| AdMarvel | eMnet | PubSquared |
| AdMaster | EngineSeeker | Pulpo Media |
| AdMaster.cn | Enreach | Pulse360 |
| Admax | Epic Game Ads | PulsePoint |
| AdMaxim | Epic MarketplaceHistory Sniffing | Q1Media |
| Admaya | e-planning | Quantcast |
| AdMedia | Epom | Quigo AdSonar |
| Admedo | EQ | QuinStreet |
| AdMeld | Ero | R- |
| AdMeta | Esendra | R66T |
| AdMicro | Etarget | RadiumOne |
| admitad | eTargeting | Rakuten LinkShare |
| Admixer | Etology | RCS MediaGroup |
| AdMob | Euroads | ReachJunction |
| adMOST | e-Viral | ReachLocal |
| Admotion | Exact Drive | Reactivpub |
| ADmulti | ExitJunction | ReactX |
| Adnet | ExitMonetization | RealClick |
| Adnet (MedyaNet) | ExoClickInterstitials | RealVu |
| Adnet Media | Experimently | Recreativ |
| adNET.de | Eyeota | RedTram |
| AdNetwork.net | eyeReturn Marketing | Redux Media |
| ADNETWORK.PRO | Eyeview | redvertisment |
| Adnologies | EyeWonder | ReferLocal |
| AdOn Network | Ezakus | Refersion |
| AdOnion | eZanga Search | Reklam Store |
| Adoperator | Facebook Custom Audience | Reklamport |
| Adorika | Facebook Exchange (FBX) | ReklamZ |
| AdoTube | Facilitate Digital | Research Now |
| AdParlor | FeatureLink | Resonate Networks |
| AdPerfect | Federated Media | Respond |
| AdPerium | FeedBurner | Result Links |
| Adpersia | Fetchback | RevenueHits |
| AdPilot | Fidelity Media | RevenueMantra |
| ADPLUS | Flag Ads | RevenueMax |
| AdProfy | Flashtalking | RevResponse |
| AdPushup | FlexOffers | Rich Media Banner Network |
| Adpv | Flite | RichRelevance |
| AdReactor | FluidAds | Right Media |
| AdReady | FLXONE | RightAction |
| Adrecord | FMAdserving | Ro2.biz |
| ADResult | Foodie Blogroll | Rokwell |
| AdRiver | ForestView | Rollad |
| Adroit Digital Solutions | Fox Audience Network | RotaBan |
| AdRoll | FreakOut | Rovion |
| adru.net | FreeWheel | rtbLab |
| Adsame | freeXmedia | Rubicon |
| AdScale | FriendFinder Network | RUN |
| Adscience | GameOnline | SaleCycle |
| AdsenseCamp | gamerDNA | SaleSpider Media |
| AdServerPub | Gazprom-Media Digital | Sanoma |
| Adservice Media | GdeSlon | SAPO Ads |
| Adsfactor | GDM Digital | Say Media |
| AdShuffle | Generic | ScaleOut |
| AdSide | Genesis | Scandinavian |
| ADSKOM | Genome | Scripps Networks |
| Adslot | GeoAds | Scupio |
| adsnative | GestionPub | Search123 |
| AdSniper | GetIntent | Second Media |
| AdSolution | GetMyAd | Sekindo |
| AdSpeed | Giant Realm | Semilo |
| AdStage | GittiGidiyor | SexAdNetwork |
| Adstars | Glam Media | SexInYourCity |
| AdsTerra | Gloadmarket | ShareASale |
| AdStir | GlobalTakeoff | ShareThrough |
| AdSupply | GoDaddy | Shopzilla |
| Adswizz | GoodADVERT | Sidecar |
| ADSXtreme | Google Adsense | Silverpop |
| Ad-Sys | Google AdWords Conversion | Simple |
| AdTaily | Google Affiliate Network | Simpli.fi |
| Adtarget.me | Google Dynamic Remarketing | Simply |
| ADTECH | Gorilla Nation | SiteScout |
| Adtegrity | Grabo Affiliate | Six Apart |
| AdTiger | GrandSlamMedia | Sizmek |
| Adtoma | Green and Red | SkimLinks |
| AdTotal | Greystripe | Smaato |
| Adtrace | GroupM Server | SMART |
| AdTraxx | GSI Media | Smart |
| AdTrustMedia | gumgum | smart4ads |
| Adult Webmaster Empire | Gunggo | smartAD |
| AdultAdWorld | H12 Ads | SmartBN |
| Advaction | Halogen Network | SmartContext |
| Advanse | Harren Media | Smarter |
| Advantage Media | HelloSociety | Sociable Labs |
| Adverline | Heyos | Sociomantic |
| Adversal | Hiiir | Sojern |
| adverServe | Hi-Media | Solve Media |
| Advert Stream | HIRO | SOMA 2 |
| Adverteerdirect | HookLogic | Sonobi |
| Adverticum | HotKeys | Spark Studios |
| Advertise.com | HOTWords | Specific Media |
| AdvertiseSpace | Hsoub | Speed Shift Media |
| Advertlets | httppool | SpeedyAds |
| AdvertPro | HUBRUS | Sphere |
| AdvertServe | Hype Exchange | Spider.Ad |
| Advidi | i2i.jp | Spongecell |
| Adview (Agora) | iClick | SponsorAds.de |
| advmaker.ru | Ideal Media | Sportsbet |
| Advolution | iEntry | SpotXchange |
| adwebster | imad | Spruce Media |
| Adwit | Image Advantage | StrikeAd |
| adXion | Image Space Media | SundaySky |
| AdXpansion | imho vi | SuperMedia |
| adyard | i-mobile | Switch Concepts |
| Adyoulike | impAct | Syncapse |
| ADZ | Impresiones Web | Synergy-E |
| Adzerk | Improve Digital | Tacoda |
| adzly | Indeed | Taggify |
| Aerify Media | IndieClick | TAGGY |
| Affectv | Industry Brains | Tailsweep |
| Affili.net | Infectious Media | Tanx |
| Affiliate Window | InfluAds | Tapad |
| Affiliate4You | InfoLinks | TapCommerce |
| Affiliate-B | Innity | TapIt! |
| AffiliateBuzz | Innovid | Target |
| AffiliateFuture | Insightera | Targetix |
| AffiliateLounge | InSkin Media | TBN.ru |
| Affiliation France | Integral Marketing | Teads |
| Affiliator | intelliAd | Teaser.cc |
| Affiliaweb | Intent IQ | TechMediaNetwork |
| Affinity | Intergi | Technorati |
| Affinity.by | Intermarkets | Technorati Media |
| Affiz CPM | InterMundo Media | Tedemis |
| AfterDownload | Internet BillBoard | Teroti |
| Aftonbladet Ads | InternetBrands | The ADEX |
| Aim4Media | Interpolls | The DECK |
| aitarget | InvestingChannel | The Publisher Desk |
| Akavita | InviziAds | ThoughtLeadr |
| Al Bawaba | iogous | TLV Media |
| Alenty | iprom | Tomorrow Focus |
| AlloTraffic | iPromote | TORO |
| Allure Media | isocket | Total Media |
| AlmondNet | iTunes Link Maker | TradeDesk |
| Altitude Digital | ity.im | TradeDoubler |
| Amazon Associates | Jeetyet Media | Tradelab |
| Ambient Digital | Jetpack Digital | Traffic Revenue |
| AMoAd | Jink | TrafficBroker |
| Amobee | Jivox | TrafficForce |
| AMP Platform | J-List | TrafficHaus |
| Anetwork | JuggCash | TrafficJunky |
| AnonymousAds | JuiceADV | Traffiliate |
| AOL Be On | JuicyAds | TrafMag |
| AppendAd | Jumptap | Traforet |
| Applifier | Just Premium | Travora Media |
| AppNexus | Just Relevant | Tremor Media |
| appssavvy | Kanoodle | Tribal Fusion |
| appTV | Kargo | TripleLift |
| Aruba | Kauli | Triton |
| AT&T AdWorks | Kavanga | Turn |
| Atedra | Kitara Media | Twyn |
| Atlas | Klikki | Tyroo Direct |
| Atlas ProfitBuilder | KlikSaya | uLogix |
| Audience Ad Network | Klixfeed | Unanimis |
| Audience Amplify | Komli ATOM | Underclick |
| Audience2Media | Komoona | Underdog Media |
| Auditorius | Kontera ContentLink | Undertone |
| Auditude | Kontextua | Unite |
| Aumago | Lanista Concepts | Unknown Advertisers |
| Avail | LCX Digital | Unruly Media |
| AvantLink | LeadDyno | Usemax |
| Avazu Network | LeadHit | uTarget |
| Avid Media | Leitmotiv | ValueAd |
| Axill | Lexity | ValueClick Media |
| Aztecash | LifeStreet | ValueClick Mediaplex |
| B2BContext | LiftDNA | ValueCommerce |
| B2Bvideo | Ligatus | ValuePubMedia |
| Back Beat Media | Lijit | vCommission |
| Baidu Ads | LINCE | Vdopia |
| Banner Connect | Linkbucks | Vemba |
| BannerPlay | LinkConnector | Venatus Media |
| Banzai | LinkedIn Ads | Veoxa |
| Batanga Network | LinkPrice | Vertical Acuity |
| BBelements | LinkShare | VerticalScope |
| Beacon Ad Network | Linkstorm | Vertoz |
| Begun | Linkwise | Verve Mobile |
| Between Digital | LinkZ | Vi |
| BidSwitch | LiveRail | Vibrant Ads |
| BidVertiser | Logicad | videoclick.ru |
| Big Mobile | logly | Videoplaza |
| Bing Ads | Lomadee | VideoStep |
| BinLayer | Lucid Media | VietAd |
| Blastro Networks | M4N | VigLink |
| Blink New Media | M8Lab | Vindico Group |
| BlogAD | Mad Ads Media | Viral Ad Network |
| BlogBang | Madison Logic | Virgul |
| BloggerAds | Magna Advertise | Vizury |
| BlogHer Ads | Magnetic | Wall Street on Demand |
| Bluelithium | Magnetise Group | Wamcash |
| BlueStreak | Mail.Ru Banner Network | Way2traffic |
| BOL | mainADV | WebAds |
| boo-box | Makazi Group | Weborama |
| Brainient | Marimedia | WebTrends Ads |
| BrainSINS | Mark & Mini | Weebly Ads |
| Brand Affinity | MarketGid | Where |
| Brand.net | Martini Media | WiderPlanet |
| Brandmovers | MasterTarget | Widespace |
| BrandReach | Matchbin | WidgetBucks |
| Brandscreen | Matomy Market | Wiget Media |
| Break Media | MaxBounty | WingAds |
| BreezeAds | Maxlab | Xaxis |
| BridgeTrack | MaxPoint Interactive | Xertive Media |
| BrightRoll | MeaningTool | XTEND |
| Brilig | Media.net | XtendAdvert |
| Broadstreet | Media-clic | Yabuka |
| Buddy Media | mediaFORGE | Yahoo! Overture |
| Burst Media | Mediagra | Yahoo! Retargetting |
| BuySellAds | MediaHub | Yandex.Direct |
| Buysight | Medialand | Yashi |
| Buzz Media | MediaMath | Ybrant Media |
| Buzzador | MediaShakers | Yeabble |
| BuzzCity | MediaShift | Yengo |
| BuzzParadise | MediaV | Yepty |
| BV! Media | Mediawhiz | YesUp |
| Bypass | Medley | YieldAds |
| C ON TEXT | MedyaNet | YieldBuild |
| C8 Network | Meebo Bar | Yieldlab |
| Cadreon | Melt | YieldMo |
| Captify | Menlo | YieldSquare |
| Captora | MentAd | YllixMedia |
| Carbon Ads | Mercent | Yodle |
| Casale Media | Merchenta | YP |
| Caspion | Meta Network | YuMe, Inc. |
| Castle Ridge Media | Metapeople | Zango |
| CBS Interactive | Meteor Solutions | Zanox |
| Celtra | Metrigo | zaparena |
| CentralTag | MI725 | Zedo |
| Centro | Miaozhen | Zenovia |
| CheckM8 | MicroAd | Zeta Search |
| CheckMyStats | Microsoft adCenter Conversion | Ziff Davis |
| ChineseAN | Mindset Media |