The Open-Source Email Platform
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, Resend or Mailgun.
- 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
Plunk is made possible by the support of our sponsors. If you self-host Plunk, consider supporting via GitHub Sponsors.
The easiest way to self-host Plunk is by using the plunk Docker image.
You can pull the latest image from Github.
A complete guide on how to deploy Plunk can be found in the documentation.
- Documentation: docs.useplunk.com
- Discord: useplunk.com/discord
You are welcome to contribute to Plunk. You can find a guide on how to contribute in CONTRIBUTING.md.
AGPL-3.0 License - see LICENSE for details.