---
title: Welcome to Plunk
description: Open-source email platform for developers
icon: House
---

## What is Plunk?

Plunk is an open-source email platform designed for developers who need a powerful, scalable solution for transactional and marketing emails. Built to handle millions of contacts, it provides everything you need to manage your email communications — sending, automation, segmentation, deliverability, and analytics.

## Key Features

<Cards>
  <Card title="Transactional Emails" href="/concepts/transactional-emails">
    Send transactional emails via API with template support and variable substitution
  </Card>
  <Card title="Email Campaigns" href="/concepts/campaigns">
    Create and send one-time email broadcasts to your contacts with advanced scheduling
  </Card>
  <Card title="Marketing Automation" href="/concepts/workflows">
    Build automated email sequences with visual workflow builder and conditional logic
  </Card>
  <Card title="Contact Management" href="/concepts/contacts">
    Manage millions of contacts with custom fields and CSV import capabilities
  </Card>
  <Card title="Dynamic Segmentation" href="/concepts/segments">
    Create dynamic audience segments based on contact data and behavior
  </Card>
  <Card title="Email Templates" href="/concepts/templates">
    Create reusable email templates for transactional and marketing emails
  </Card>
  <Card title="Event Tracking" href="/guides/tracking">
    Track events and use them to trigger workflows and segment audiences
  </Card>
  <Card title="Billing" href="/concepts/billing">
    Understand Plunk's billing model and pricing
  </Card>
</Cards>

## Quick Links

<Cards>
  <Card title="API Reference" href="/api-reference/overview">
    Explore the complete API documentation
  </Card>
  <Card title="Self-Hosting" href="/self-hosting/introduction">
    Deploy Plunk on your own infrastructure
  </Card>
  <Card title="Domain Verification" href="/guides/verifying-domains">
    Learn how to verify your domains for sending emails
  </Card>
  <Card title="API Keys" href="/guides/api-keys">
    Manage your API keys and authentication
  </Card>
</Cards>

## Open Source

Plunk is fully open-source and available on GitHub. Contributions are welcome!

## Support

If you need help or have questions:

- Read the documentation
- Check the GitHub repository
- Join our Discord community