MailerSend - Better transactional emails for teams.
Customer.io - We make it easy to send emails triggered by user behavior. Build, measure and improve your emails to activate and retain users
HEY - Email at its best, new from Basecamp.
HubSpot - Grow Better With HubSpot: Software that's powerful, not overpowering. Seamlessly connect your data, teams, and customers on one CRM platform that grows with your business.
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
If No Reply - Simple email automation that works for Gmail