HTMLEmail.io - Responsive HTML email templates for startups & developers
Mailivery - Reach the Inbox, not the spam folder.
Startup Emails - Responsive HTML email templates for startups
Sidemail - The simplest way to send transactional emails. Sidemail makes sending transactional emails trivial, it's perfect for side projects, MVPs or the next big thing.
Stripo - Stripo is an all-in-one email design platform. We enable our clients to build emails of any complexity, including interactive AMP emails, really fast and easy.
Postal - Open source mail delivery platform, alternative to Mailgun or Sendgrid