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, only if you proactively share it. 
Later, you will be able to voluntarily share it with friends, followers and other applications. For more information on that you can read our vision post.

To provide you the service of creating hyperlinks to highlights with Memex.Link, we need to store the url on which the link has been created and the highlighted text on our servers. 
We do use Amazon S3 and Lambda functions for that and do not store or process any personally identifiable information about users sending or requesting those links (like IP addresses). We do however collect statistics about usage, in order to optimise our infrastructure and to identify misuse of the service. 
You can ensure yourself about this fact in our GitHub repository

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. 
For error tracking and crash reports we use

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. 

Backup to Google Drive, or any other provider. 

If you choose a cloud provider to backup your data there, these providers will currently have access to your unencrypted data. 
Be aware of this before you choose one. Currently we only offer Google Drive, but have laid the foundation for people to add more providers. 
If you are a developer and want to integrate one of your favorite providers or make client-side encryption possible, let us know via email or on join us on Slack
b) Google Drive Integration special note: 
Memex opens up a hidden folder on Google Drive that only the Memex app can read. We do this so that the Memex app cannot access any other folder in your Drive, and thus might be a security vulnerability. We know its not ideal for people who want to access this data externally.
To change this we intend to make a local export in structured JSON format possible. 
If you are a developer and want to implement a feature to export Memex to your hard drive or syncing between devices let us know via email or on join us on Slack


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: 17.11.18

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?
    • based on interactions with core features: search, annotations, collections, memex link
  • Time since install
  • # of urls in DB
  • Country
  • Error Logs in case of crashes
  • Browser type
  • Retention rate: Time until uninstall


  • Time spent on Welcome page
  • Tutorial picked on Welcome Page 


  • Interactions with modal showing ability to contribute to crowdfunding projects
  • interactions with notifications


  • # 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
  • # of uses of tagging
  • # of uses of collections
  • # of uses of Memex.Links