CadenceRelay

Self-hosted bulk email platform for sending 100K+ personalized emails via Gmail SMTP or AWS SES.

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CadenceRelay is an open-source, self-hosted platform for sending large, personalized bulk email campaigns through Gmail SMTP or AWS SES, with a campaign wizard, template editor, contact management for large CSV lists, and real-time open/click/bounce analytics. It deploys with Docker Compose on a self-managed server. It is aimed at organizations sending high-volume email who want the cost of self-hosting instead of per-contact pricing from hosted platforms like Mailchimp.

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