Email Infrastructure & Marketing Tools

Open source email servers and marketing tools you can self-host. Compare Mailchimp, SendGrid, and Postfix alternatives by deliverability. Updated Sept 2026.

listmonk

23,3002,587

An open-source, self-hosted newsletter and mailing-list manager, and an alternative to Mailchimp and Sendinblue. listmonk ships as a single Go binary with a modern dashboard, scales to millions of subscribers, and supports SQL-based segmentation, templating, multi-list campaigns, and delivery through any SMTP provider.

9/6/20262587 contributors