GetResponse has been in business since 1998, and is one of the more popular, if not the most popular, email marketing services in the biz. The company boasts a customer base of around 350,000 individuals and businesses.
The popularity is deserved. Aside from being an extremely reliable, versatile, and user-friendly marketing email service with comprehensive features, the platform has evolved into a robust, all-in-one marketing solution that now offers a laundry list of marketing features like webinar hosting, landing pages, and automated sales funnels.
Given GetResponse's comprehensive email services, its variety of marketing services, and competitive pricing (not to mention its strong reputation and two decades of experience,) GetResponse should probably be your go-to solution for email marketing.