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MailCheapMarketing & SEOMailCheap is an AGPL-3.0 newsletter app for writing, sending and publishing issues from a dashboard, REST API or AI agent. Self-host it with Amazon SES or PostShiba, or use MailCheap Cloud from $19 a month for 20,000 emails.Open sourceSelf-hostedFreemium
NotifuseMarketing & SEONotifuse is a self-hosted email marketing and transactional email platform in Go and React with a visual MJML editor, automations, web analytics and seven sending providers. Source-available under BSL 1.1, with EU Cloud plans.CommercialSelf-hostedFreemium
PlunkAPIs & IntegrationsPlunk is an AGPL-3.0 email platform that combines a transactional API, SMTP relay, campaigns, segments and event workflows on one contact list. Use the hosted service at $0.001 per email or self-host it with Docker and your own Amazon SES account.Open sourceSelf-hostedFreemium
useSendAPIs & IntegrationsuseSend is an AGPL-3.0 email platform that sends through Amazon SES. It offers a REST API, SMTP relay, TypeScript, Python and Go SDKs, campaigns, contact books, webhooks and analytics, as a hosted service or a self-hosted Docker install.Open sourceSelf-hostedFreemium