1. HubSpot is an inbound marketing and sales platform that helps companies attract visitors, convert leads, and close customers.

  2. Mailman is free software for managing electronic mail discussion and e-newsletter lists.

  3. Perfect widgets for your website: surveys, email opt-in forms, contact forms, popups, follow, share buttons and live chats - all in one place!

  4. Mustache.Website is a free service you can use to run your email campaigns, host your landing pages or send your transactional emails.

  5. Easy to use, powerful and affordable email marketing application.

  6. Postmark is the easiest and most reliable way to be sure your important transactional emails get to the inbox. Simply & reliably parse recieved email to JSON for your webapp.

  7. Marketo's powerful marketing automation software helps marketers master the art & science of digital marketing to engage customers and prospects.

  8. Buttondown is the best way to start and run your newsletter

  9. Mautic is marketing automation software (email, social, & more).

  10. Planable is the command center of social media campaigns trusted by agencies, freelancers, and marketing teams, that allows you to easily create, collaborate, get approval and schedule posts for your social media campaigns.

  11. phpList is an email and newsletter marketing tool.

  12. SMTP2GO is the scalable, reliable email deliverability solution. Worldwide servers, a robust API, and powerful reporting set us apart. Try our free plan!