Ship product-based emails that deliver more value with less effort

Email built in. Not bolted on.

Ship product-based emails that deliver more value with less effort

Email, wired in. Not tacked on.

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Centralized and connected

Centralize templates, coordinate across channels, and track results in one platform

Personalized for humans

Easily turn product data into emails that are personal and on time

Built for teams

Product teams can design, ship, and iterate on emails fast, without the engineering overhead.

PHI-compliant notifications with BAA, SOC 2, encryption, audit logs, and regional data residency.

Email built for your product.

Always on email journeys

Cut through crowded inboxes with automation powered by product activity, user preferences, and time optimization.

Your brand. Always consistent.

Keep your emails on-brand without the tedious updates. Courier lets you set shared styles and components once, then reuses them everywhere automatically.

User preferences made simple

Give users control over what they hear and how they hear it. Courier’s preference center manages channels, topics, and frequency to reduce fatigue.

Measure what matters

Centralize delivery, open, and click data without stitching it together. Courier gives you a complete view across every channel and provider so you can measure what matters.

Plug in any provider

Courier connects to any email service provider (ESP), giving you orchestration, failover, and tracking without switching tools.

SendGrid

High-volume email delivery with proven reliability. Bonus: Twilio users can easily add Segment event triggers.

Mailgun

Developer-focused email APIs built for performance and scalability, with fine-grained control over routing and analytics.

Resend

React-based templates with a modern delivery infrastructure. Ideal for developers building scalable email systems.

Amazon SES

Scalable and cost-efficient email delivery, designed for developers who want flexibility without high overhead.

Postmark

Transactional email with a reputation for speed and detailed delivery tracking. Purpose-built for critical notifications.

SMTP

A universal standard for sending email through any provider or server. Simple, direct, and highly interoperable.

SparkPost

Predictive email delivery platform with real-time analytics, optimized for high deliverability and inbox placement.

Mailjet

Intuitive email editor and collaboration tools, with support for both marketing and transactional messages.

and more…

Design to delivery, in minutes.

Design and ship notifications without code or deploys.
Courier helps Engineers stay focused while Product teams iterate.

Design and ship notifications without code or deploys. Courier helps Engineers stay focused while Product teams iterate.

Visual Email Builder

Build and update email templates in a drag-and-drop editor. No deploys, no engineering tickets.

Personalized at scale

Use product activity and variables to adapt messages. No custom code needed.

Version History + Rollback

Easily track changes, compare versions side by side, and revert anytime. No stress, no risk.

With Courier, we can manage every notification, for every user, across every channel, in one easy-to-use platform.

Cooper Newby — Co-Founder & Chief Product Officer, Bluecrew

Frequently Asked Questions

How do I set up multiple email providers and configure failover for better deliverability?

Courier supports automatic failover between multiple email providers (SendGrid, AWS SES, Mailgun, SMTP) to ensure reliable delivery. Add multiple integrations in your workspace, then configure them in your notification template's email channel settings. Courier automatically retries with backup providers when encountering timeouts, rate limits, or server errors.

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How do I set up multiple email providers and configure failover for better deliverability?

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Why are my emails not being delivered, and how do I troubleshoot delivery issues?

How do I track email opens and clicks, and what analytics are available?

How do I set up custom domains and email authentication (SPF, DKIM) for better deliverability?

How do I personalize emails with dynamic content and variables?