What are some alternatives?
Campaign Monitor - Email marketing software built for designers and their clients to run successful email campaigns.
SendInBlue - Innovative online Email Marketing solution to manage your contacts, create & send your newsletters and track your results. More than 80 000 clients. Best prices and attractive features.
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Mailgun - A set of powerful APIs that enable you to send, receive and track email from your app effortlessly whether you use Python, Ruby, PHP, C#, Node.js or Java.
Zoho Campaigns - Zoho Campaigns is an email marketing tool with CRM & social media integration to help you create, send and track effective email campaigns.
Elastic Email - Elastic Email is an all-in-one email delivery platform for both marketing and transactional email.