sendgrid

useSend

+15

Open source alternative to Resend, Sendgrid, Postmark etc.

notifuse

+12

Open-source, self-hosted newsletter, email marketing and transactional email platform. Visual MJML editor, Liquid templating, 7 sending providers.

kurrier

+4

Kurrier is a modern, self-hosted workspace for email, calendar, contacts and storage.

nikoksr/notify

+3

A dead simple Go library for sending notifications to various messaging services.

django-anymail

+2

Django email backends and webhooks for Amazon SES, Brevo, MailerSend, Mailgun, Mailjet, Mailtrap, Postmark, Postal, Resend, Scaleway TEM, SendGrid, SparkPost, Unisender Go and more

email-templates

+1

Create, preview (browser/iOS Simulator), and send custom email templates for Node.js. Made for @forwardemail, @ladjs, @cabinjs, @spamscanner, and @breejs.