We use both pixel perfect comparison (imagemagick) and also built a custom solution that can understand vertical shifts. Check examples to see the difference.
To start the project you can simply scan several of your webpages for internal links to build the list of pages you would like to be covered with visual testing.
Drupal, Wordpress or custom authentication. Test your dashboards, profile pages and other parts of your site that require log in. Provide credentials and in case of custom authentication — CSS selectors of the form elements.
Scroll the page before taking a screenshot. A must for web pages with lazy loading images and other elements.
If your stage / dev sites are behind the firewall all our workers can come from the same IP address so you can whitelist it.
You can send a slack message to your slack channel or send test results to your CI server.
14 days trial period