transactional-email

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

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.

One simple SDK for transactional email across 23 adapters

Self-hosted transactional email platform — send through your own AWS SES account, keep the dashboard, API keys, delivery logs, and webhooks on your own infrastructure.

React components for transactional emails, landing pages, invoices and PDFs: email-safe HTML, responsive web HTML, and print-ready PDF HTML from one component tree.

One unified email API across 18 providers (SMTP, Resend, SES, Postmark, SendGrid, Mailgun, …). Zero deps, RFC 8058 + DKIM ready, edge-first, strict TypeScript.

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

Self-hosted email sending platform built on Cloudflare Email Sending — REST API, admin UI, templates, domain management, scoped API keys, all in one Docker container.

Self-hosted email gateway between your apps and a transactional mail provider (Postmark, Resend, Mailgun, AWS SES, or outbound-SMTP). Three ingress shapes (HTTP form, HTTP API, SMTP). One Docker container, one TOML config.

Open-source transactional email API and self-hostable Resend alternative. SMTP, inbound mail, webhooks, and campaigns for developers.

Send email and SMS, run flows and campaigns, and call Nitrosend MCP tools from the terminal.

Official mailtrap.io MCP server

Elixir client for the Mandrill transactional email API.

A Resend-compatible email platform on Cloudflare Workers — transactional sending, broadcasts, automations, inbound mail and deliverability analytics. MIT, one-click deployable into your own account.

Self-hosted email platform for teams: audiences, campaigns, transactional email, automations, and first-party engagement tracking. Laravel 13 · Inertia 3 · React 19.

Self-hosted email API for developers free alternative to SendGrid/Resend

Effect-native transactional email for TypeScript: typed messages, durable delivery, providers, policies, SMTP, HTTP gateway, and workflows.

The Developer Email Infrastructure Platform.

Open-source email marketing platform. Self-hostable, API-first, built with Go and Vue.

Real-world Elastic Email examples for transactional email, SMTP, webhooks, inbound email, contacts, serverless platforms and AI coding agents across 20+ languages and frameworks.