Paris-founded email marketing and transactional email platform combining a marketer campaign builder with a developer email API.

Mailjet is a unified email platform for both marketers and developers, handling bulk marketing campaigns and transactional messages such as password resets and receipts from one system. It offers a drag-and-drop editor, behavior-triggered automation, segmentation, and A/B testing.

For technical teams, it provides a RESTful email API with multi-language SDKs, an SMTP relay, and webhooks. It serves businesses from small teams to high-volume senders, and its parent company, Sinch AB, is headquartered in Stockholm, Sweden — keeping both the operating and controlling entities within the EU.