Unosend

Unosend is an email infrastructure platform designed to help teams reliably send transactional emails and marketing campaigns through a simple, developer-friendly API. It focuses on delivering a stable backbone for email delivery so that product and marketing teams can integrate, send, and monitor emails without managing complex infrastructure. The platform is built to support scalable, programmatic sending while maintaining high deliverability and clear visibility into performance.

Key capabilities include a straightforward REST API and SMTP support for sending transactional emails such as password resets, order confirmations, notifications, and onboarding sequences. Unosend provides tools for managing contact lists, building and scheduling campaigns, and segmenting audiences based on user attributes or behavior. Robust analytics and reporting allow teams to track delivery, opens, clicks, bounces, and complaints, helping them optimize content and maintain list health. Additional features such as template management, webhooks, and customizable sending domains support integration into existing applications and workflows.