Delete yourself from the internet by pressing this button
thenextweb.com
thenextweb.com
It requires access to your GMail inbox to read what accounts you've set up. After you've enabled this app to read your inbox, it'll identify what accounts it believes you have signed up for based on some heuristic. For every account it identifies, you'll be prompted to mark it as deleted or saved. It identified 142 accounts from my inbox, although I didn't recognize most of these accounts -- most of these were probably incorrectly identified. Some accounts it identified were already deleted, and there's no way to tell the web app that you've already deleted it. I have 15k emails in this inbox and the web app took only a few seconds to load.
Overall, I had identified around 40 probably still valid accounts I wanted to delete. The tool was only able to help me delete 9 of my accounts, but still, it doesn't delete all of your accounts in "a press of a button", it's a very manual process. To delete an account, you press a button which redirects you to a page within the website that helps you delete it. It took me a few minutes to delete every account since I had to reset the password, log in, and re-click the button in this web app to be redirected to the correct account delete page again. After deleting an account, you mark it as deleted in the web app to remove it from your queue.
It identified and helped me delete my Myspace, Photobucket, EventBrite, Kahn Academy, and Coinbase accounts. My Wordpress, Groupme, NameCheap, and WolframAlpha accounts couldn't be deleted because these websites won't let you although from the web app it looks like you can. The delete button for my Coinbase account didn't redirect me to the correct place on their website, but I was able to delete it by manually finding the correct page.
It's a really tiny, simple web app. The workflow could really be improved and I wished it would tell me what accounts of mine could really be deleted or not. The web app only helps you with deleting accounts from the most popular websites, unfortunately. As you can see, it only helped me delete 5 out of the 40 or so accounts I wanted to delete that it identified.
Tell me how this cannot possibly go wrong. Go on, I'm listening.
Unroll.me does something similiar.
It does allow the company to read your emails, apparently.