Mailjet

A well-established European email service provider known for collaborative email design, strong deliverability, and developer-friendly APIs, competing in the mid-market ESP segment.

Mailjet is a Paris-founded email service provider that delivers a comprehensive suite of tools for both transactional and marketing email. Its platform enables businesses to design, send, and track email campaigns through an intuitive drag-and-drop editor, real-time analytics, and a robust SMTP relay and API infrastructure. Mailjet is particularly noted for its collaborative email design features, allowing multiple team members to work simultaneously on email templates — a differentiator in the crowded ESP market. Mailjet serves a broad range of customers from startups and SMBs to larger enterprises, offering scalable pricing and a developer-friendly API that supports high-volume transactional email delivery. The platform supports segmentation, A/B testing, contact list management, and marketing automation workflows, positioning it as a full-featured alternative to competitors like Mailchimp, SendGrid, and Brevo. Mailjet operates as an independent brand. While it was previously acquired by Sinch, the parent company relationship has been cleared and it operates as a standalone entity. Its European roots give it a strong emphasis on GDPR compliance and data privacy, which resonates with European businesses and global companies with EU obligations. Mailjet continues to be a significant player in the email delivery and marketing automation space.