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.

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.

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

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.

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 API for developers free alternative to SendGrid/Resend

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

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

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

The Developer Email Infrastructure Platform.

Build beautiful, reliable HTML emails with SolidJS.

Official C# / .NET SDK for the Elastic Email REST API v4. Send transactional and marketing emails, and manage contacts, lists, templates, campaigns, domains and webhooks. Available on NuGet.