Top 10 Most Popular Email Clients of 2015

As another year wraps up, email is still reminding us that nothing in this industry is boring, despite what some naysayers would like to have us think! We tracked nearly 1 billion emails every month throughout 2015, measuring where and how your messages are opened around the world. While some things remained the same—the top three email clients in January were still the top three in November—there was some drama along the way.