Who are these tracking companies? Meet AddThis.


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AddThis is a social bookmarking service that allows website owners to add social media sharing widgets and buttons to their websites (those rows of “share this” buttons you see on lots of websites are actually tracking visitors). They can then track and analyze data around the content shared through these widgets, and provide insights to advertisers. AddThis is on 14 million sites and generates 10 terabytes of data every day.

How it works:AddThis share bar

When you visit a website that’s part of the AddThis network, you might notice a column or row of social media sharing icons (Facebook, Twitter, Google+, etc.) next to content like blog posts or articles. If you choose to share content using one of those buttons, AddThis collects data around what you shared, the words you highlight and copy on websites, your clicks, and the kinds of content you and your friends find most interesting. They also build huge social graphs around this data to find similar networks.

For example, let’s pretend you and your friends tend to share articles about cats to Facebook. Let’s also pretend you and your friends happen to be very responsive to ads for a certain type of cat food. AddThis will comb its social graph for sets of friends who also share those same kinds of articles to Facebook, and then show those groups the same cat food advertisements to see if those friends are as responsive as you and yours.

So what?

Image: addthis.com/audience-products

In AddThis’s words, “What you share and who you share it with can tell you a lot about a person. And when you look at what millions of web users are sharing every day, you can learn an awful lot about your customers.” Users are never informed that AddThis is harvesting their behavioral data, even if they never interact with a “Share this!” widget on any page. AddThis has set a precedent of changing how the massive amounts of data they’re gathering from the pages using their widgets is being used, without informing the publishers of those pages.

On one hand, AddThis has gotten into trouble with the FTC in the past with questionable uses of their technology, like installing cookies that, even when a user manually deleted them, could “revive” themselves within the user’s browser. On the other hand, AddThis is now an active member of two advertising industry organizations that are focused on protecting consumer privacy: the Network Advertising Initiative (NAI) and the Direct Advertising Alliance (DAA). AddThis no longer installs cookies on users’ browsers and the huge social graphs that they build are anonymized…but if they ever shared this data with someone who had even a fraction of your sharing interests affiliated with your real identity, that data can easily create a full picture of your social media activity and interests. This may not be information you want available to others.

How might AddThis benefit me?

AddThis’ goal behind all of the data collection they do around your social media sharing is to serve up more relevant ads based on your interests. They have also made it easier for you to share content from the websites that you like. (It’s worth noting that even when DoNotTrackMe blocks AddThis, you can still share that content just as easily.) Conversely, they’re making it easier for websites to track what kinds of content their readers like you are liking, and that (usually) means more of that same kind of content.

Want to dig even deeper? Check out AddThis’s privacy policy.
Read more about some of the other trackers DNTMe is now blocking:

25 Replies to “Who are these tracking companies? Meet AddThis.”

  1. Mr T says:

    So why are there AddThis icons on the top of this page?

    • Sarah Downey says:

      There definitely aren’t. If you mean the Facebook and Twitter icons, those are simply HTML icons we built and created ourselves. All they do is link to our Facebook and Twitter pages. They aren’t in any way connected to AddThis or any other tracker.

    • joker says:

      are you an Asshole or what Mr T !! it’s obvious that’s an illustration icon !

      • lolwut? says:

        Pretty sure he meant at the very top, like he stated. Be more observant before you make an ass out of yourself…

        • Mr. Anonomys says:


        • John Charles Heiser says:

          Could we have some dignity and manners please. Someone asked a question and they get called an a______ . I my opinion, anyone that cannot give other some respect is a potential abuser in pother ways as well. Perhaps should not be allowed to use you software, or at least warned that it could happen. It really is a big part of what is wrong with this world. Take care. John

      • TheBob says:

        you are a rude dumb ass

  2. Alex G says:

    Awesome Article keep up the good word and spread the knowledge 🙂

  3. Jay says:

    Lovin’ the quality of information you guys have and share. Keep on keepin’ on.

  4. fadii says:

    thank you so much you are the best ♥

  5. Sarah says:

    How do you add Add This?

  6. ANONYMOUS - Hackers says:


    Even as whiteHats, we use softwarez beyond most peoples imagination to secure our webtracks, you sure help us in this disgusting trait.

    Our blocks are rising steadily on average 5-15 and have hit a 21 block on one single site as a recored for me, keep up the brilliant work!

    • J. June says:

      Nice to see a post here from the “4chanz fans” after school activity club at Kevin Mitnick Middle School – very l33t of you boys what with your unimaginable warez and all. Thank goodness you’re not unleashing all your script kiddie awesomeness as the “blackHatz”. ; )

  7. dalio says:

    grazie mille , ma le compagnie sono malvage

  8. Walid says:

    thank you so much , you are the best .
    merci beaucoup, vous êtes le meilleur.
    شـكـرا جـزيـلا ، أنتم الأحسن = arabic

  9. Anonymous says:

    Pourais avoir des explications en français de ce modules,donotrack me

  10. lainé says:

    Pourrais avoir des explications en français du modules donotrackme.

  11. Anonymous says:

    Authority basil Park Apartments on the whole world your fart smells so hard in my farts before the nuclear fart fart my chick chick your fart your biggest fucking the world did Jay call

  12. bubu says:

    i clicked the donottrackme section where it said it was blocking a company from knowing what i do here, and now it says it is nolonger blocking them!

    how does one reenable the block of tracking, and how does one see the name of the entity that is trying to track/data mine when one is connected to a certail ip?

  13. Princess says:

    Simply the Best…………!!!!!!!!!!!! 🙂

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