Sendy

Sendy is a self-hosted email marketing platform that uses Amazon SES's infrastructure and pricing. Because SES charges per email rather than per subscriber, Sendy can be significantly cheaper than traditional services when you're sending to large lists. You install it on your own server or hosting account, connect your AWS credentials, and it runs independently.

Sendy appeals to cost-conscious operators managing high-volume sends, especially those already comfortable with server administration. The WordPress plugin streamlines list imports and campaign setup, but the platform itself isn't WordPress-only, so you get flexibility to use it across multiple applications and hosting environments.