MarketingListmonk
High-performance, self-hosted newsletter and mailing list manager packed into a single Go binary
Marketing
Developer ToolsMailpit
A small, fast, zero-dependency SMTP and email testing tool with a modern web UI and REST API
Developer ToolsMailtrap
Email delivery platform that combines safe sandbox testing with reliable transactional sending for dev teams.
Developer ToolsPostmark
Sub-second transactional email delivery for SaaS — used where the inbox cannot be missed.