The Open-Source Email Router

CourierX

One API, multiple providers, zero lock-in. CourierX delivers your email, no matter the route.

Never Miss a Delivery

Multi-Provider Email Infrastructure

Send through SES, SendGrid, Mailgun, SMTP and more with automatic failover and smart routing.

Your Freedom Guaranteed

Zero Lock-in Architecture

Open-source architecture means you're never trapped. Switch providers or self-host anytime.

Built for Developers

Enterprise-Ready Scale

Scalable email API for SaaS with suppression handling, per-domain routing, and enterprise-grade monitoring.

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Why CourierX? Multi-Provider Email Infrastructure

Send and receive email across multiple providers with automatic failover and redundancy. Connect Gmail, Outlook, SMTP, SendGrid & more through one developer-first API.

Multi-Provider Routing

Never worry about email downtime. Intelligent routing switches between Gmail, Outlook, SMTP providers instantly when issues arise.

Developer-First API

Clean SDKs, comprehensive docs, and quickstart guides. Built for developers who need reliable email infrastructure.

Enterprise-Ready Scale

From startup to enterprise. Scalable infrastructure with deliverability focus, smart retries, and real-time analytics.

Enterprise & Partnerships

Looking to integrate CourierX at scale or explore partnership opportunities?

partnership@courierx.dev

Get Started Free - Join Early Access

Spaces are limited while we prep the fleet. Reserve your dispatch today and be first to experience reliable email routing.

// Building the future of email infrastructure?
// We're looking for talented developers: team@courierx.dev