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Plunk — self-hosted email delivery, campaigns, contacts, workflows, and analytics in one platform

OSS scale score Not calculatedOSS health 85Update pace 27 commits/30d
About these scores

OSS scale score is an unbounded metric that log-compresses and weights Stars, Watchers, Forks, and Contributors. Discovery score is the current OSS scale score minus the score at discovery. Update pace is commits in the last 30 days, growth momentum is the OSS scale score difference within the recent observation window, and OSS health is a 0–100 rating based on available recency, Community Health, and release data.

Stars
5,477
Primary language
TypeScript
License
AGPL-3.0
Repository last updated
Sep 14, 2026

Overview

Plunk combines transactional email, newsletters, contact management, segmentation, workflow automation, and engagement analytics. Applications can send through APIs or SMTP relay, while custom domains and inbound email routing are also supported. The latest release checked is v0.14.0.

Features and best fit

Based on official documentation; not hands-on tested · Content checked:

Send application email through APIs or SMTP

Transactional messages can use templates and variables through the API, while SMTP relay supports existing tools and frameworks.

Sources: [2]

Manage campaigns, segments, workflows, and engagement analytics together

Plunk supports newsletters, dynamic audience segments, contact history, trigger/delay/conditional workflows, and metrics such as opens, clicks, and bounces.

Sources: [2]

For products that want transactional and marketing email in one system

It fits teams that prefer one platform for authentication/notification emails, newsletters, contact segmentation, and automation.

Sources: [2]

Self-hosting does not remove deliverability, privacy, or compliance work

Operators still need to manage DNS authentication, sender reputation, bounces, complaints, unsubscribes, and applicable email rules. Contact/activity data also needs access control and backup/retention policies. Plunk is AGPL-3.0.

Sources: [2][3][4]

Official sources

  1. [1]useplunk/plunk repository(2026-09-18)
  2. [2]Plunk README(2026-09-18)
  3. [3]Plunk LICENSE(2026-09-18)
  4. [4]Plunk v0.14.0 release(2026-09-18)
Supplemental curator note

Plunk combines transactional messages, newsletters, audience segmentation, and automation in one platform. Self-hosting still leaves deliverability dependent on DNS, sender reputation, bounce handling, and mail operations.

Try it in 3 steps

  1. 1

    Get the source

    git clone --depth 1 https://github.com/useplunk/plunk.git
  2. 2

    Enter the repository

    cd plunk
  3. 3

    Check the official steps

    Continue with the commands in the README Installation, Quick Start, or Getting Started section.

    find . -maxdepth 1 -iname 'README*' -exec sed -n '1,220p' {} \; -quit
Check the official README

Growth

Growth trends · Last 30 days

5,477 Stars

Trend data is still being collected.

Development activity

Last 90 days · weekly

Commits (last 30 days)
27
Open PRs
30

Development activity is still being collected.

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GitHub data

GitHub dataView detailed GitHub data
View on GitHub
Stars
5,477
Forks
401
Watchers
17
Open issues
34
Primary language
TypeScript
License
AGPL-3.0
Repository last updated
Sep 14, 2026
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