/ Choose Self-hosted email marketing software | Broadcast if
Its stated focus matches what you need: Broadcast is an end-to-end email marketing software that helps you create, send, and analyze email campaigns. It is a modern, cloud-based platform that is easy to use and integrate with other tools.
/ Choose Mailhub - The All-in-One API for email sending & monitoring if
Its stated focus is closer to your workflow: Mailhub is an API for sending emails, offering tools for building, testing, tracking and monitoring. Create templates using our built-in code editor, enjoy full i18n support, and access a wide range of developer-friendly tools.