Twilio SendGrid

Nodemailer

nodemailer/nodemailer

Popular

The standard SMTP email-sending module for Node.js.

Resend

resend.com

Trending

Developer-focused transactional email API with first-class React Email support.

React Email

resend/react-email

Trending (detected automatically)

Build responsive HTML emails with React components and preview them locally.

Amazon SES

aws.amazon.com

Popular

Low-cost, high-volume email sending service on AWS.

Novu

novuhq/novu

Open-source notification infrastructure for email, SMS, push, chat and in-app inboxes.

MJML

mjmlio/mjml

Markup language that compiles to responsive, client-safe HTML email.

Mailpit

axllent/mailpit

Local SMTP testing server with a web UI; the maintained successor to MailHog.

Maizzle

maizzle/framework

Framework for building HTML emails with Tailwind CSS and email-specific post-processing.

Postmark

postmarkapp.com

Transactional email service known for fast, reliable inbox delivery.