Plunk
The Open-Source Email Platform
## 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).
## License
AGPL-3.0 License - see [LICENSE](LICENSE) for details.