Competitive Insights by eDataSource is a free Chrome extension that provides detailed email marketing insights about the brand websites you visit. Developed by eDataSource, Inc., this extension allows you to view and monitor your competitors' email campaigns directly from within your browser. It seamlessly accompanies you as you surf the web, delivering the latest email campaign data without interrupting your browsing experience.

With Competitive Insights, you can easily access almost any brand's latest email campaigns and gain valuable insights. The extension provides key metrics such as list size, deliverability, read/open rates, and most active send times, among others. This information helps you stay informed about your competitors' email marketing strategies and make data-driven decisions for your own campaigns.