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Email notification view

Courier gives your transactional email API superpowers

Courier provides the infrastructure needed to turn your email API into a complete notification system. Manage templates, deliverability, routing, and user preferences all in a single API.

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Trusted by product teams at

Lattice
LaunchDarkly
Expel
Bluecrew
Blissfully
LTSE

BACKED BY

Y Combinator
Slack Fund
Twilio

More than just an email API

Courier goes way beyond the traditional transactional email APIs. Courier is your complete notification infrastructure.

Bring Your Own Provider

Bring Your Own Provider

Send transactional emails through any and all email providers. SendGrid, Postmark, Mailgun, Gmail, we support them all.

Email Template Designer

Email Template Designer

We beleive transactional emails should still look great. Our designer lets you build beautiful and dynamic email templates.

Automated Email Workflows

Automated Email Workflows

Design complex automated email workflows with steps that include delay, check data, send to list, and more.

Analyze Detailed Logs

Analyze Detailed Logs

Courier provides detailed logs of every email sent through our API. This helps identify issues and ensure deliverability.

A visual editor that everyone can use

Utilize our drag-and-drop builder or control every pixel with our code editor, then easily collaborate on designs with other team members.

1. Email

2. SMS

3. Push

4. Chat

Email
Email list send view
List Sends

Complex Email List Sends

Courier allows you to design and execute dynamic, customized list sends with a single API call. Perfect for product updates, customized newsletters, and more.

1
// Send an email welcoming a new user to your product.
2
// Send a weekly product usage email to a list of users,
3
// pulling the data for each user from an endpoint.
4
{
5
"message": {
6
"to": {
7
"list_id": "weekly_subscribers",
8
"template": "weekly_product_digest",
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"data_source": {
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"action": "fetch-data",
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"webhook": { "url": "https://main.app/digest" }
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}
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}
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}
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}
Built for Developers

Email

SMS

Push

Chat

WhatsApp

Chat

Microsoft Teams

Chat

Slack

Chat

FB Messenger

Chat

SendGrid

Email

Mailgun

Email

Amazon SES

Email

SparkPost

Email

Twilio

SMS

MessageBird

SMS

Plivo

SMS

Telnyx

SMS

Firebase

Push

One Signal

Push

Airship

Push

Expo

Push

Integrations

We Support Your Provider

Courier supports sending through any provider you choose, even Gmail. We also support sending through SMS, chat, and push providers for multi-channel notifications.

View all email providers

In Depth Email Logs

We treat email logs just like any other developer logs. Trace every step in the process, identify bottlenecks, and optimize deliverability.

Notification insights dashboard

You're in good company

Aaron White

Aaron White

CTO & Co-Founder

"By moving to Courier to send notifications, we've been able to eliminate 120,000 lines of code. That's logic, templates, and other third-party API integrations we no longer have to maintain."

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Build your first notification in minutes

Send up to 10,000 notifications every month, for free.

Email & push notification

Build your first notification in minutes

Send up to 10,000 notifications every month, for free.

Email & push notification

Product

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