AI visibility report for Plunk in Transactional Email & Developer Email APIs.

Plunk is an open-source email platform founded in Belgium in 2022 by Dries Augustyns. Built on top of AWS SES, it unifies transactional emails, marketing campaigns, and workflow automation in a single, developer-first tool. Plunk went fully open-source under the AGPL-3.0 license in August 2024 and can be self-hosted via Docker Compose. It targets indie hackers, solopreneurs, and small SaaS teams who want a simple, affordable alternative to fragmented email stacks. Its key differentiators are per-email pricing at $0.001 with unlimited free contact storage, a sub-five-minute setup claim, and full code transparency. The hosted service is EU-hosted and GDPR-compliant by default. The main GitHub repository has accumulated approximately 5,000 stars.

Plunk is a bootstrapped, open-source email platform that consolidates transactional email delivery, marketing campaigns, and visual workflow automation into one developer-friendly tool. Operated as a profitable indie side-project out of Belgium, it is self-hostable under the AGPL-3.0 license and uses AWS SES as its delivery backbone, offering a managed interface that removes the complexity of raw cloud email APIs.