I built an email marketing tool made for indie hackers and solopreneurs
Send transactional emails, run marketing campaigns, and automate workflows. Open-source and self-hostable, $0.001 per email, no contact limits.
I built an email marketing tool made for indie hackers and solopreneurs launched on July 25, 2022 with 109 votes, #273 of 2,916 launches that month and more than 90% of that year's launches. The site was still online in September 2026, 4 years on.
In plain words
Plunk is an email marketing tool designed specifically for indie hackers and solopreneurs. It helps users build and manage email campaigns to reach their audiences. The platform launched in July 2022 and focuses on providing email marketing capabilities for solo builders and small independent operators who need straightforward tools to communicate with their customers and subscribers.
written from the facts on this page · September 2026
From the sources
Transactional email, marketing campaigns, and automated workflows, all against one contact list. Most email platforms take days to configure. Plunk is sending in under five minutes: domain, DKIM, first send. Other platforms charge more as your list grows. Plunk stores unlimited contacts for free and bills only on send. Closed-source platforms own your stack. Plunk is fully inspectable, forkable, and self-hostable on your own infra. Trigger on any event your code sends. What you see on the canvas is the whole definition. A segment is a query, re-run every time you use it. The same campaign sent tomorrow reaches tomorrow’s audience. Add one MX record and every address at your domain starts…from useplunk.com
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