Plunk
useplunk.comOpen-source transactional email platform — self-hostable, $0.001/email, no contact limits.
Marketing & Growthemailtransactional-emailopen-sourceself-hostedmarketing-automationworkflow-automationgdpr
About
Plunk is an open-source email platform that combines transactional emails, marketing campaigns, and workflow automation in a single self-hostable tool. It offers a visual builder for email sequences, unlimited contact storage, and AGPL-3.0 licensed code with GDPR compliance. Pricing is usage-based at $0.001 per email sent, positioning it as a low-cost alternative to Resend, SendGrid, Mailchimp, and others.
Problem
Most email platforms are expensive, slow to configure, and lock you into their stack as your contact list grows.
For
developers and founders building SaaS products or side projects
How it works
Plunk provides a unified platform with a visual workflow builder, unlimited contact storage, and pay-per-send pricing, deployable via Docker Compose or as a managed cloud service.
Business model
freemium
Status
launched