![card.png](https://www.useplunk.com/api/og?title=Open-Source%0AEmail%20Platform&description=%240.001+per+email.+No+contact+limits.+Free+to+self-host.)

<h1 align="center">Plunk</h1>

<p align="center">
    The Open-Source Email Platform
</p>

<p align="center">
    <a href="https://github.com/useplunk/plunk/graphs/contributors"><img src="https://img.shields.io/github/contributors/useplunk/plunk" alt="Contributors"/></a>
    <a href="https://github.com/useplunk/plunk/actions"><img src="https://img.shields.io/github/actions/workflow/status/useplunk/plunk/docker-publish.yml" alt="Build Status"/></a>
    <a href="https://github.com/useplunk/plunk/blob/next/LICENSE"><img src="https://img.shields.io/github/license/useplunk/plunk" alt="License"/></a>
    <a href="https://github.com/useplunk/plunk/stargazers"><img src="https://img.shields.io/github/stars/useplunk/plunk" alt="Stars"/></a>
    <a href="https://github.com/useplunk/plunk/issues"><img src="https://img.shields.io/github/issues/useplunk/plunk" alt="Issues"/></a>
    <a href="https://github.com/useplunk/plunk/network/members"><img src="https://img.shields.io/github/forks/useplunk/plunk" alt="Forks"/></a>
    <a href="https://github.com/useplunk/plunk/pkgs/container/plunk"><img src="https://img.shields.io/badge/docker-available-blue?logo=docker" alt="Docker"/></a>
    <a href="https://github.com/sponsors/driaug"><img src="https://img.shields.io/badge/sponsor-❤-ff69b4" alt="Sponsor"/></a>
    <a href="https://docs.useplunk.com"><img src="https://img.shields.io/badge/docs-docs.useplunk.com-black" alt="Documentation"/></a>
    <a href="https://useplunk.com/discord"><img src="https://img.shields.io/badge/discord-join-5865F2?logo=discord&logoColor=white" alt="Discord"/></a>
</p>

## Introduction

Transactional emails, marketing campaigns, and workflow automation — in one platform. Self-hostable, $0.001 per email, no contact limits.

An open-source, self-hosted alternative to tools [SendGrid](https://sendgrid.com/), [Resend](https://resend.com) or [Mailgun](https://www.mailgun.com/).

## Features

- **Transactional Emails**: Send emails straight from your API with template support and variable substitution
- **SMTP**: Use Plunk as an SMTP relay to send emails from any existing tool or framework
- **Campaigns**: Send newsletters and product updates to large audiences
- **Workflows**: Create advanced automations with triggers, delays, and conditional logic
- **Segments**: Organize contacts with dynamic filtering and target the right audience
- **Contact Management**: Manage contacts with custom fields and full activity history
- **Analytics**: Track opens, clicks, bounces, and engagement metrics in real-time
- **Custom Domains**: Verify and send from your own domains with DKIM/SPF support
- **Inbound Emails**: Receive and process incoming emails with custom routing rules

## Sponsors

Plunk is made possible by the support of our sponsors. If you self-host Plunk, consider supporting
via [GitHub Sponsors](https://github.com/sponsors/driaug).

## Self-hosting Plunk

The easiest way to self-host Plunk is by using the `plunk` Docker image.
You can pull the latest image from [Github](https://github.com/useplunk/plunk/pkgs/container/plunk).

A complete guide on how to deploy Plunk can be found in
the [documentation](https://docs.useplunk.com/self-hosting/introduction).

## Community

- **Documentation**: [docs.useplunk.com](https://docs.useplunk.com)
- **Discord**: [useplunk.com/discord](https://useplunk.com/discord)

## Contributing

You are welcome to contribute to Plunk. You can find a guide on how to contribute in [CONTRIBUTING.md](CONTRIBUTING.md).

<a href="https://github.com/useplunk/plunk/graphs/contributors">
  <img src="https://contrib.rocks/image?repo=useplunk/plunk" alt="Contributors" />
</a>

## License

AGPL-3.0 License - see [LICENSE](LICENSE) for details.
