Send transactional + marketing email w/ 99.9% deliverability
The best email API for developers. Send transactional and marketing emails with 99.9% deliverability. Simple REST API, competitive pricing, and 5,000 free emails/month. Better than Resend & SendGrid. Start free today.
Unosend offers real-time delivery logs showing sent, delivered, soft bounces, hard bounces, opens, and clicks with per-email event history and timestamps, enabling developers to debug delivery problems immediately.
Unosend allows creation of multiple sending agents per domain, domain verification with SPF/DKIM/DMARC management, and separation of transactional, notification, and campaign emails in one dashboard for organized multi-stream management.
Unosend supports standard SMTP relay on ports 465 and 587, allowing developers to connect any application via SMTP without modifying existing code, while also offering a clean REST API for new integrations.
Unosend provides a REST API and SMTP relay to send transactional emails like password resets, OTP codes, and order confirmations with guaranteed delivery under 3 seconds and real-time tracking of sends, opens, clicks, and bounces.
Unosend handles DKIM, SPF, and DMARC authentication automatically, manages bounce suppression lists, provides dedicated warmed IPs, and separates sending streams by type to protect sender reputation and maximize inbox placement.