useplunk/plunk
Some data may be outdated — see provenance labels.
The Open-Source Email Platform observed · 2026-10-02
Health v2 · maintenance only
89/100
- Activity 97
- Release rhythm 96
- Longevity 59
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-10-21. Adoption (stars, forks) is never an input.
- gap_med: 12.5
- age_days: 830
- days_rel: 30
- days_push: 21
- n_releases_24m: 17
Adoption not part of the score
5499 stars · 409 forks observed · 2026-10-02
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
Plunk is an open-source, self-hostable email platform combining transactional email sending (API and SMTP), marketing campaigns, and event-triggered workflow automation against a single contact list. It offers dynamic segmentation, a visual email editor, inbound email processing, analytics, and an MCP server for AI agent integration, positioned as an alternative to SendGrid, Resend, and Mailgun.
Use cases
- send transactional emails like password resets from my app
- self-host an alternative to SendGrid or Mailgun
- build automated onboarding email sequences
- send newsletters to segmented audiences
- receive and process inbound emails at my domain
- send email via SMTP from existing tools
- manage a large contact list without per-contact pricing
- let AI agents draft and send email campaigns
When to choose
- you want full data ownership and self-hosting with Docker
- you need transactional email, campaigns, and automation in one tool
- you have a growing contact list and dislike per-contact pricing
- you want event-triggered workflows with branching and delays
- you need both SMTP relay and REST API sending
When to avoid
- you need a fully managed service and cannot run infrastructure
- you require deep marketing features like A/B testing or landing pages found in Mailchimp
- your license requirements are incompatible with AGPL-3.0
- you only need a simple SMTP relay without a dashboard
Facets
application · maturity active
email workflow-automation webhook analytics mcp api-framework self-hosted email developer-tools self-hosted apis self-hosted transactional-email email-marketing smtp-relay email-campaigns marketing-automation contact-management email-templates inbound-email sendgrid-alternative mailgun-alternative marketing automation docker web-server nodejs typescript
10 sources
- readme: https://github.com/useplunk/plunk · fetched 2026-10-02 · 33262da7c8bf
- homepage: https://www.useplunk.com · fetched 2026-08-29 · 6e41bf3f7cd2
- site_page: https://docs.useplunk.com · fetched 2026-08-29 · 4dd10c03b1d0
- site_page: https://www.useplunk.com/features/workflows · fetched 2026-08-29 · 5122cf9a76f7
- site_page: https://www.useplunk.com/features/segments · fetched 2026-08-29 · 2243d1e307e9
- site_page: https://www.useplunk.com/features/inbound-email · fetched 2026-08-29 · 40f8bd978c10
- site_page: https://www.useplunk.com/features/email-editor · fetched 2026-08-29 · 33bfcd135a3d
- site_page: https://www.useplunk.com/features/smtp · fetched 2026-08-29 · 0414cb6cc594
- site_page: https://www.useplunk.com/features/mcp · fetched 2026-08-29 · b2af45aafa0d
- site_page: https://www.useplunk.com/pricing · fetched 2026-08-29 · 99c02ecef7ee
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| useplunk/plunk | main | 89 |
For agents
Data as of 2026-10-19T08:05:51.212177+00:00 · Report a problem