Listmonk — #1 Alternative to Mailchimp
Blazingly fast single-binary Go newsletter and mailing list manager backed by Postgres
Listmonk packs multi-threaded SMTP/SES campaign broadcasting, SQL-powered subscriber segmentation, transactional templates, and media management into a single self-hosted Go binary.
License: AGPL-3.0 · Pricing: Free & Open Source · Compare all Mailchimp alternatives · Official Website