Gmail is a free email service developed by Google. Users can access Gmail on the web and using third-party programs that synchronize email content through POP or IMAP protocols.
Mailchimp
Mailchimp is an all-in-one marketing platform that helps you manage and talk to your clients, customers, and other interested parties. Our approach to marketing focuses on healthy contact management practices, beautifully designed campaigns, and powerful data analysis.
MailJet
Create, send and optimize marketing transactional and automated emails. With Mailjet build and deliver dynamic emails for your mailing campaign or newsletters.
SendGrid
SendGrid is a leader in trusted email delivery. Our powerful cloud-based solution sends transactional and marketing email, allowing our customers to focus on their business, instead of their email infrastructure.
SparkPost
One of the most popular and performant email delivery services. Offers a free tier that includes 100,000 free emails per month (25,000 daily limit).