Listmonk

Deploy Listmonk on Out Plane — a high-performance, self-hosted newsletter and mailing list manager. Listmonk can send millions of emails with a multi-threaded, multi-SMTP architecture while providing a clean admin UI for campaign management, subscriber segmentation, and analytics. It is a self-hosted alternative to Mailchimp and Buttondown.

Listmonk includes a rich HTML template editor with Go template variables, subscriber import/export, list segmentation, click and open tracking, bounce processing, and webhook integrations. Connect any SMTP provider including Amazon SES, Postmark, or your own mail server. Self-hosting on Out Plane means zero per-subscriber or per-email fees.

Ideal for newsletters, marketing campaigns, transactional email, and any organization that needs a self-hosted email platform with unlimited subscribers and sends without usage-based pricing.