Developer ToolsResend
Email API for developers — send transactional and marketing emails at scale
Developer Tools
MarketingLoops
The modern email platform built specifically for SaaS — marketing, transactional, and product email in one Notion-style editor
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.