See Who's Using Ember.js
Logos are added by company representatives. These companies may or may not be using Ember on their main web properties, but they're definitely using it somewhere in their organizations :)
Feel free to track down folks who work at a specific company if you're looking for more detail on their specific usage.
To add your company or project to this page, submit a Pull Request.
Be sure that your logo has a transparent background and includes adequate white space.
Additional instructions are in the code.