# Plunk

> Updated 2026-09-03 · type: tool · category: marketing-automation · status: active · rev 1

OSS alt to Resend; ~5347 stars; via openalternative.co

- Open source: yes (AGPL-3.0)
- Self-hostable: yes
- Pricing model: usage
- Best for: Organizations seeking an open-source alternative to email platforms like SendGrid, Resend, or Mailgun for transactional emails, campaigns, and automation.
- Last verified: 2026-09-04

- **Canonical:** https://gtmstacker.com/registry/tool/plunk/
- **Source:** [github · github.com/useplunk](https://github.com/useplunk/plunk)
- **Tags:** marketing-automation, marketing-automation-email
- **Repository:** https://github.com/useplunk/plunk

## Is Plunk open source?

Yes — AGPL-3.0-licensed.

## How much does Plunk cost?

Usage-based pricing.

## Can I self-host Plunk?

Yes — it can be self-hosted.


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OSS alt to Resend; ~5347 stars; via openalternative.co