Privacy Policy

Your personal data is yours

All your personal data is stored locally on your computer.
Noone will EVER have access to it by default.
Later, you will be able to voluntarily share it with friends, followers and other applications. For more information on that you can watch our vision video.

Anonymous Usage Statistics may collect crash reports and anonymous statistics about how users use our website, the Memex software and its features.
This data will not contain any personal data (e.g. terms you search, the urls you visit/bookmark or the pages you blacklist)
The data is solely used to improve Memex stability, usability and features, and is not shared with any 3rd party.
Below is a complete list of all the data points Memex gathers currently. To cross-check this list you can examine our source code on GitHub. To protect your privacy, we don’t use Google Analytics. Instead we use Piwik, an open-source alternative, and host the gathered data on our servers.

Opting-out of Usage Statistics

We respect your wish of opting out either through the “do-not-track”-feature of the browser. We also offer a separate opt-out feature in our software. 

Privacy Policy Changes

Although most changes are likely to be minor, may change its Privacy Policy from time to time, and in’s sole discretion. encourages visitors to frequently check this page for any changes to its Privacy Policy. Your continued use of this site after any change in this Privacy Policy will constitute your acceptance of such change.

Date of last change: 26.11.17

Protection of Certain Personally-Identifying Information will not rent or sell any of the gathered statistical, potentially personally-identifying and personally-identifying information to anyone. If you are a registered user of a newsletter and have supplied your email address, may occasionally send you an email to tell you about new features, solicit your feedback, or just keep you up to date with what’s going on with and our products. We primarily use our blog to communicate this type of information, so we expect to keep this type of email to a minimum. takes all measures reasonably necessary to protect against the unauthorized access, use, alteration, or destruction of potentially personally-identifying and personally-identifying information.

Scope of Privacy Policy

This Privacy Policy applies to the information that we obtain through your use of services via a device or when you otherwise interact with, Memex and WorldBrain UG. services include our:

Websites: ( and subdomains *

Downloadable Products: (Memex Browser Extensions).

The only data that is sent to us, are some basic, anonymised usage statistics about how people use the extension.
None of your personally identifiable data like the urls you visit, bookmark, blacklist or terms you search for are sent to us. 
You can always opt-out from that and we respect your browser’s “do-not-track” request.

On the website

  • Page you came from
  • Country
  • Time & duration of visit
  • Type of Browser & Operating System
  • If user converts aka. downloads the extension

In Memex browser extension

General Metrics

  • Active user yes/no?
  • Time since install
  • # of urls in DB
  • Country
  • Error Logs in case of crashes
  • Browser type


  • Time spent on Welcome page
  • Selection picked on Welcome Page (Watching tutorial, Reading Tutorial, Go Browsing


  • # of searches per week
  • # of failed & successful searches per week
  • % of search in addressbar vs. popup vs. overview
  • # of bookmark searches
  • # of NLP queries vs. date picker
  • # of uses for pagination



  • Download Concurrency levels
  • Use of bookmarks import
  • Use of history import
  • # of imports started


  • # of uses for bookmarking feature in overview vs. popup
  • # of uses for blacklisting feature in popup vs. in options page
  • # of uses for popup in general
  • # of deletion events
  • # of uses of share buttons