# Plunk

> Open-source transactional email platform supporting automated workflows, marketing campaigns, and unified contact management.

- Website: https://www.useplunk.com/?ref=devshelf.io
- DevShelf page: https://devshelf.io/resource/plunk
- Pricing: Freemium, Pay-as-you-go
- Tags: Open Source, Self-hosted
- Categories: [Email & Notification APIs](https://devshelf.io/category/email-notification-apis.md)
- Last checked: 2026-11-03

## About

Plunk is an open-source email platform designed for transactional emails, marketing campaigns, and automated workflows managed through a single contact list. It provides a REST API, SMTP support, inbound email handling, and real-time analytics. Plunk can be used via its EU-hosted cloud infrastructure or self-hosted under the AGPL-3.0 license, offering developers an alternative to traditional email delivery services.

## Alternatives

- [Resend](https://devshelf.io/resource/resend.md): Email platform for developers to send transactional and marketing emails at scale with a focus on deliverability. (pricing: Freemium, Pay-as-you-go)
- [Loops](https://devshelf.io/resource/loops.md): Email sending platform for SaaS teams to manage marketing, product, and transactional emails with API and workflow support. (pricing: Freemium)
- [Postmark](https://devshelf.io/resource/postmark.md): Fast and reliable transactional email delivery service and API for developers, focusing on high inbox deliverability and message streams. (pricing: Freemium)

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