Mailtrain vs Sendy: What are the differences?
Mailtrain: Self-hosted open-source Mailchimp clone. Mailtrain is a self hosted newsletter application built on Node.js (v5+) and MySQL (v5.5+ or MariaDB); Sendy: Send newsletters, 100x cheaper via Amazon SES. Sendy is a self hosted email newsletter application that lets you send trackable emails via Amazon Simple Email Service (SES). This makes it possible for you to send authenticated bulk emails at an insanely low price without sacrificing deliverability.
Mailtrain and Sendy can be primarily classified as "Email Marketing" tools.
Mailtrain is an open source tool with 4K GitHub stars and 435 GitHub forks. Here's a link to Mailtrain's open source repository on GitHub.