Design here.
Send everywhere.
Design here.
Send everywhere.
Design here.
Send everywhere.
Design here.
Send everywhere.
Create beautiful, on-brand messages for every channel, not just email. Courier Design Studio pairs visual tools with full API access, so your whole team can build, test, and send from one place.
Create beautiful, on-brand messages for every channel, not just email. Courier Design Studio pairs visual tools with full API access.
An editor that can do it all
A visual designer with real control: layout, styling, dynamic data, and conditional logic. Build messages for email, SMS, push, in-app, Slack, Microsoft Teams, and WhatsApp, without writing code.
A visual designer with real control: layout, styling, dynamic data, and conditional logic. Build messages for email, SMS, push, in-app, Slack, Microsoft Teams, and WhatsApp.
Fast iteration
Design, preview, ship.
No engineering required.
Go from idea to live in seconds. Every change is versioned, so you can compare, review, and roll back instantly. No deploy, no ticket, no waiting on a sprint.
Go from idea to live in seconds. Every change is versioned, so you can compare, review, and roll back instantly. No deploy, no ticket, no waiting on a sprint.
Brand consistency
Your brand across
every message
Set your logo, colors, and fonts once, and every message you send picks them up. Use one brand or as many as you need, with a different look for every product, country, or customer.
Set your logo, colors, and fonts once, and every message you send picks them up. Use one brand or as many as you need, with a different look for every product, country, or customer.
Broadcasts
Campaigns without the hassle
Turn the user data already in Courier into targeted broadcasts for product launches, newsletters, updates, and more. Reach any user segment on any channel, with preferences honored and every message tracked.
Turn the user data already in Courier into targeted broadcasts for product launches, newsletters, updates, and more. Reach any user segment on any channel, with preferences honored and every message tracked.
Fast iteration
Measure every message.
Maximize results.
Get a complete view of message performance: delivery, open, and click rates in real time, on every channel, down to the individual recipient. Use those insights to improve your content, timing, and delivery strategy.
Get a complete view of message performance: delivery, open, and click rates in real time, on every channel, down to the individual recipient. Use those insights to improve your content, timing, and delivery strategy.
We already built the hard parts. You just use them.
Everything you need.
Already built-in
Every message arrives through the right channel, in the right language, and exactly as intended. Preferences, personalization, AI translations, tracking, and role-based access are all built in. Ready for humans and AI agents.
Every message arrives through the right channel, in the right language, and exactly as intended. Preferences, personalization, AI translations, tracking, and role-based access are all built in. Ready for humans and AI agents.
User Preferences
User Preferences
Let users pick the topics they want. Courier checks preferences before every send, so nothing unwanted goes out.
Multi-Tenant Branding
Multi-Tenant Branding
Easily manage branding across all your tenants with scoped themes, logos, and styles, all from one place.
Dynamic Personalization
Dynamic Personalization
Customize messages with user data to ensure that all messages are relevant, actionable, and on-brand.
Version History
Version History
Track every change, compare versions side-by-side, and instantly roll back if something doesn’t look right.
Device Previews
Device Previews
See exactly how your message renders on 98 devices and clients, from iPhone and Android to the dreaded Outlook.
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AI translations
AI translations
Accurately translate any message in seconds for a few cents, with variables placed for each language's grammar.
Roles and Permissions
Roles and Permissions
Roles and Permissions
Control who can view, edit, and publish messages with enterprise-grade access controls and team-based permissions.
Control who can view, edit, and publish messages with enterprise-grade access controls and team-based permissions.
Test Sends
Test Sends
Test any message with real variables and channel-specific views. Catch issues before they reach your users.
Omnichannel Delivery
Omnichannel Delivery
Design for email, SMS, push, in-app, Slack, Microsoft Teams, and WhatsApp. Add a channel without starting over.
Translate with native fluency in seconds with AI
What once took weeks now takes one click and costs pennies. Add a language and Courier’s Claude-powered AI translation uses your company context to preserve brand names and place variables naturally. When your template changes, every translation updates automatically.
What once took weeks now takes one click and costs pennies. Add a language and Courier’s Claude-powered AI translation uses your company context to preserve brand names and place variables naturally. When your template changes, every translation updates automatically.
Embed Design Studio in your product
Let your customers create and manage messages without leaving your product. Each tenant controls its own content and branding, while Courier handles delivery across every channel. Add the white-label experience with our React SDK instead of building and maintaining an editor and delivery stack yourself.
Let your customers create and manage messages without leaving your product. Each tenant controls its own content and branding, while Courier handles delivery across every channel. Add the white-label experience with our React SDK instead of building and maintaining an editor and delivery stack yourself.
Courier powers customer messaging
from startups to the Fortune 500
Powering customer messaging
from startups to the
Fortune 500
10,000,000+
Developers
400,000+
Businesses
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Twilio delivers multichannel notifications at scale with Courier
Twilio, powering nearly a trillion digital interactions a year across texts, email, voice, and video, used Courier to unify message infrastructure for their 400,000+ customers.
3,000+
healthcare facilities
95%
nurse contract completion rate
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Trusted Health powers hospital workforce notifications with Courier
Trusted Health uses Courier to deliver product-driven notifications across clinicians and hospital operators—supporting credentialing, job matching, and staffing workflows with messaging tied directly to real-time product data.
2.7M+
small businesses supported
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Nav delivers real-time banking notifications with Courier
Nav uses Courier to power reliable, multi-channel notifications for banking and credit products—keeping alerts tied directly to real-time product events at scale.
10,000,000+
Developers
400,000+
Businesses
Twilio delivers multichannel notifications at scale with Courier
Twilio, powering nearly a trillion digital interactions a year across texts, email, voice, and video, used Courier to unify message infrastructure for their 400,000+ customers.
3,000+
healthcare facilities
95%
nurse contract completion rate
Trusted Health powers hospital workforce notifications with Courier
Trusted Health uses Courier to deliver product-driven notifications across clinicians and hospital operators—supporting credentialing, job matching, and staffing workflows with messaging tied directly to real-time product data.
2.7M+
small businesses supported
Nav delivers real-time banking notifications with Courier
Nav uses Courier to power reliable, multi-channel notifications for banking and credit products—keeping alerts tied directly to real-time product events at scale.
10,000,000+
Developers
400,000+
Businesses
Twilio delivers multichannel notifications at scale with Courier
Twilio, powering nearly a trillion digital interactions a year across texts, email, voice, and video, used Courier to unify message infrastructure for their 400,000+ customers.
3,000+
healthcare facilities
95%
nurse contract completion rate
Trusted Health powers hospital workforce notifications with Courier
Trusted Health uses Courier to deliver product-driven notifications across clinicians and hospital operators—supporting credentialing, job matching, and staffing workflows with messaging tied directly to real-time product data.
2.7M+
small businesses supported
Nav delivers real-time banking notifications with Courier
Nav uses Courier to power reliable, multi-channel notifications for banking and credit products—keeping alerts tied directly to real-time product events at scale.
10,000,000+
Developers
400,000+
Businesses
Twilio delivers multichannel notifications at scale with Courier
Twilio, powering nearly a trillion digital interactions a year across texts, email, voice, and video, used Courier to unify message infrastructure for their 400,000+ customers.
3,000+
healthcare facilities
95%
nurse contract completion rate
Trusted Health powers hospital workforce notifications with Courier
Trusted Health uses Courier to deliver product-driven notifications across clinicians and hospital operators—supporting credentialing, job matching, and staffing workflows with messaging tied directly to real-time product data.
2.7M+
small businesses supported
Nav delivers real-time banking notifications with Courier
Nav uses Courier to power reliable, multi-channel notifications for banking and credit products—keeping alerts tied directly to real-time product events at scale.
10,000,000+
Developers
400,000+
Businesses
Twilio delivers multichannel notifications at scale with Courier
Twilio, powering nearly a trillion digital interactions a year across texts, email, voice, and video, used Courier to unify message infrastructure for their 400,000+ customers.
3,000+
healthcare facilities
95%
nurse contract completion rate
Trusted Health powers hospital workforce notifications with Courier
Trusted Health uses Courier to deliver product-driven notifications across clinicians and hospital operators—supporting credentialing, job matching, and staffing workflows with messaging tied directly to real-time product data.
2.7M+
small businesses supported
Nav delivers real-time banking notifications with Courier
Nav uses Courier to power reliable, multi-channel notifications for banking and credit products—keeping alerts tied directly to real-time product events at scale.
10,000,000+
Developers
400,000+
Businesses
Twilio delivers multichannel notifications at scale with Courier
Twilio, powering nearly a trillion digital interactions a year across texts, email, voice, and video, used Courier to unify message infrastructure for their 400,000+ customers.
3,000+
healthcare facilities
95%
nurse contract completion rate
Trusted Health powers hospital workforce notifications with Courier
Trusted Health uses Courier to deliver product-driven notifications across clinicians and hospital operators—supporting credentialing, job matching, and staffing workflows with messaging tied directly to real-time product data.
2.7M+
small businesses supported
Nav delivers real-time banking notifications with Courier
Nav uses Courier to power reliable, multi-channel notifications for banking and credit products—keeping alerts tied directly to real-time product events at scale.
10,000,000+
Developers
400,000+
Businesses
Twilio delivers multichannel notifications at scale with Courier
Twilio, powering nearly a trillion digital interactions a year across texts, email, voice, and video, used Courier to unify message infrastructure for their 400,000+ customers.
3,000+
healthcare facilities
95%
nurse contract completion rate
Trusted Health powers hospital workforce notifications with Courier
Trusted Health uses Courier to deliver product-driven notifications across clinicians and hospital operators—supporting credentialing, job matching, and staffing workflows with messaging tied directly to real-time product data.
2.7M+
small businesses supported
Nav delivers real-time banking notifications with Courier
Nav uses Courier to power reliable, multi-channel notifications for banking and credit products—keeping alerts tied directly to real-time product events at scale.
10,000,000+
Developers
400,000+
Businesses
Twilio delivers multichannel notifications at scale with Courier
Twilio, powering nearly a trillion digital interactions a year across texts, email, voice, and video, used Courier to unify message infrastructure for their 400,000+ customers.
3,000+
healthcare facilities
95%
nurse contract completion rate
Trusted Health powers hospital workforce notifications with Courier
Trusted Health uses Courier to deliver product-driven notifications across clinicians and hospital operators—supporting credentialing, job matching, and staffing workflows with messaging tied directly to real-time product data.
2.7M+
small businesses supported
Nav delivers real-time banking notifications with Courier
Nav uses Courier to power reliable, multi-channel notifications for banking and credit products—keeping alerts tied directly to real-time product events at scale.
Give your AI agents a production messaging stack
What your team sees in Courier’s UI is the same notification system developers and agents access through the API, CLI, and MCP servers. Everyone shares the same context and controls, so they can build, extend, and operate together while Courier maintains the infrastructure underneath.
What your team sees in Courier’s UI is the same notification system developers and agents access through the API, CLI, and MCP servers. Everyone shares the same context and controls, so they can build, extend, and operate together while Courier maintains the infrastructure underneath.
import Courier from "@trycourier/courier";
const client = new Courier(); // reads COURIER_API_KEY
const { requestId } = await client.send.message({
message: {
to: { user_id: "37e2c08c-3958-449a-8266-dea286807f65" },
template: "account-upgrade",
data: {
companyName: "PrismAI",
planName: "Pro",
cardLastFour: "4242",
},
},
});Node.js
Ruby
Python
Go
PHP
import Courier from "@trycourier/courier";
const client = new Courier(); // reads COURIER_API_KEY
const { requestId } = await client.send.message({
message: {
to: { user_id: "37e2c08c-3958-449a-8266-dea286807f65" },
template: "account-upgrade",
data: {
companyName: "PrismAI",
planName: "Pro",
cardLastFour: "4242",
},
},
});
Every message, every channel. One platform
Stop building messaging infrastructure. Start shipping.
