Engage customers on the channels they use
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The customer engagement platform trusted by 11,000+ brands
Reach people wherever they are
Email
Create marketing and transactional emails with Design Studio or the Agent.
SMS & MMS
Turn customer behavior into timely texts that feel personal.
In-app messages
Speak to customers while they’re in your web or mobile app, with messages shaped by their behavior.
WhatsApp
Message customers on the app where they have their everyday conversations.
Web push notifications
Reach people in the major desktop and mobile browsers.
Early accessMobile push notifications
Send rich push notifications with images and deep links on iOS and Android.
Live Activities and Live Updates
Show real-time updates, like a delivery tracker, on iOS and Android lock screens.
PremiumNotification inbox
Keep messages in a centralized place in your app or website so they can be revisited.
LINE
Natively send LINE messages directly through your campaigns.
Slack
Alert your team when a customer takes action, like submitting a help ticket.
Webhooks
Send data to and from public APIs from an automation.
Ad audiences
Sync segments to your ad platforms to retarget customers.
Direct mail
Engage customers in real life with thoughtful, tangible mail.
Sign-up forms
Capture email addresses and phone numbers and turn visitors into leads.
Orchestrate your channels
in one journey
Adapt each customer’s path in real time, based on what they do along the way.
Explore journeysMulti-channel automations
Email, push, in-app, SMS, WhatsApp, webhooks, and more.
Build with AI
Use AI to design and refine across every channel you run.
Branching logic
Send each customer down a unique path with flexible logic.
Subscription center
Let your audience choose which channels they hear from you on.
Tools built for modern teams
Deliver polished messaging with lightweight SDKs, flexible APIs, and developer-friendly tooling.
Mobile SDKs
Purpose-built SDKs for iOS, Android,
and web applications.APIs
Move data in and out of Customer.io from your terminal,
Postman, or custom integration.CLI
Install our skill, point an agent at it,
and let it drive.MCP server
Create profiles, send, and check delivery from any
MCP-compatible environment.
Questions?
We’ve got answers.
Omnichannel messaging that
delivers outcomes
Turn on your next channel
- 14-day free trial
- No card required
- Cancel anytime
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