usesend / useSend

Open source alternative to Resend, Sendgrid, Postmark etc.

nikoksr / notify

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

Notifuse / notifuse

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

anymail / django-anymail

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

forwardemail / forwardemail.net

Privacy-focused encrypted email for everyone. All-in-one alternative to Gmail + Mailchimp + Sendgrid.

kurrier-org / kurrier

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

hyvor / relay

📨 Open-Source Email API for Developers. Cloud & Self-hosted Alternative to SES, Mailgun, SendGrid.

goposta / posta

Self-hosted email delivery platform that enables applications to send emails via HTTP APIs while handling SMTP delivery, templates, storage, security, and analytics. Fully self-hostable alternative to services like SendGrid or Mailgun.

dahlia / upyo

Upyo is a simple and cross-runtime library for sending email messages using SMTP and various email providers. It works on Node.js, Deno, Bun, and edge functions.

opencoredev / email-sdk

One simple SDK for transactional email across 23 adapters

MillionSend / millionsend

The open-source email platform — self-host on your own AWS SES, or use the cloud. Resend-compatible API.