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Plunk

Send transactional emails, run marketing campaigns, and automate workflows — all open-source and self-hostable.…

Visit Plunkuseplunk.com
Free plan
Plunk screenshot, image 1

Overview

Send transactional emails, run marketing campaigns, and automate workflows — all open-source and self-hostable. $0.001/email, no contact limits.

AI summary

Plunk is an open-source, self-hostable tool designed for sending transactional emails, running marketing campaigns, and automating workflows, offering a cost-effective pricing model.

Sources behind this listingSee source links, recorded dates and owner corrections.

Observed facts come from public pages. Founder-edited facts are supplied by the verified owner. AI-inferred facts are model interpretations; derived facts are calculated from other data. A source link lets you check the current page. It does not guarantee the fact is still current.

Dates show when a record was saved. Some older records use the listing’s update date; they are not proof of a fresh check. Missing source records are shown explicitly.

TaglineSend transactional emails, run marketing campaigns, and automate workflows — all open-source and self-hostable.…
ObservedRecorded Source: www.useplunk.com
DescriptionSend transactional emails, run marketing campaigns, and automate workflows — all open-source and self-hostable. $0.001/email, no contact limits.
ObservedRecorded Source: www.useplunk.com
Free planYes
ObservedRecorded Source: www.useplunk.com
Free trialNot stated
Source not recordedDate not recordedSource link unavailable
Pricing modelfreemium
AI-inferredRecorded Source: www.useplunk.com
IntegrationsDiscord, GitHub, Linear, Mailchimp, SendGrid, Twilio
ObservedRecorded Source: www.useplunk.com
Plan: Free PlanFree
AI-inferredRecorded Source: www.useplunk.com
Plan: Paid PlanFree
AI-inferredRecorded Source: www.useplunk.com
SummaryPlunk is an open-source, self-hostable tool designed for sending transactional emails, running marketing campaigns, and automating workflows, offering a cost-effective pricing m...
AI-inferredRecorded Source link unavailable

Pricing

Pricing recorded 1 October 2026Pricing page
Free Plan
Free
emails per month
1000
  • 1,000 emails per month
  • No credit card required
  • Free forever
Paid Plan
Free
emails per month
unlimited
  • Everything in Free
  • No Plunk branding
  • Monthly spend cap
Free tier: 1,000 emails per month

Who Is It For

Best for

Organizations looking for a flexible, self-hosted solution for email and marketing automation without contact limits.

–Not for

Businesses that require extensive customer support or advanced features typically found in more established platforms.

Strengths & Weaknesses

Biggest strength

The ability to send emails at a very low cost with no limits on contacts, making it appealing for startups and small businesses.

Classification

Likely competitors
MailgunSendGridMailchimpTwilio

Alternatives to Plunk

See all alternatives to Plunk

Community

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How we sourced this: Observed fields () were crawled from https://www.useplunk.com/ when recorded. Source links and dates are available above. AI-inferred fields () were generated by gpt-4o-mini and are always labelled, never presented as measured fact. Last updated: 1 October 2026. Site availability checked: 30 September 2026. Is this your tool? Claim it to edit and get a do-follow badge.