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  • Get Started
    • Welcome to Customer.io
    • Quick start guide
    • 1. Create your workspace
    • 2. Set up message channels
    • 3. Integrate with Customer.io
    • 4. Add people
    • 5. Send events and make segments
    • 6. Start sending campaigns and workflows
  • Journeys
    • Introduction to Journeys
    • People & Events
    • Objects & non-people data
    • Segmentation
    • Campaigns & Workflows
    • Message Channels
    • Liquid & Personalization
    • Metrics
    • Integrations
  • Data Pipelines
    • Get Started
    • Sources
    • Destinations
  • Account & Settings
    • Account Verification
    • Billing
    • Your Account
    • Workspaces
    • Privacy & Security
    • Troubleshooting
  • Release Notes
    Release Notes

    Latest features at Customer.io

    Build campaigns faster with our redesigned experience!
    2025-01-16

    Our new campaign builder has all the same features and functionality as before, but now you can modify settings, trigger data, and your workflow from …

    Expo plugin 2.0 release
    2024-12-24

    We’ve updated our Expo SDK, adding CDP features so you can seamlessly integrate with destinations beyond Customer.io—like your analytics …

    Duplicate campaigns within a workspace
    2024-12-19

    You can now duplicate campaigns within a workspace to preserve campaign settings like triggers, goals, and exit criteria in addition to workflow …

  • Videos
    • Journeys Track API
    • Journeys App API
    • Data Pipelines API
    • Reporting Webhooks
    • Data Pipelines Web
    • iOS
    • Android
    • React Native
    • Expo Plugin
    • Flutter
  • APIs
    • Data Pipelines API
    • Journeys
      • Track API
      • App API
      • Reporting Webhooks
  • SDKs
    • JavaScript Web source
    • iOS
    • Android
    • React Native
    • Expo Plugin
    • Flutter
  • Welcome to Customer.io
  • Quick start guide
  • 1. Create your workspace
  • 2. Set up message channels
  • 3. Integrate with Customer.io
  • 4. Add people
  • 5. Send events and make segments
  • 6. Start sending campaigns and workflows
  • Introduction to Journeys
      • Anonymous people
      • Anonymous activity
      • Merging anonymous activity
    • People and their profiles
    • Add people
    • Manually add/update people
    • Import people or events via CSV
    • Storing and using JSON
      • User Attributes
      • Events
      • Anonymous Events
      • What's the Last Visited field, and how do I use it?
      • How do I create multiple subscription types?
    • Resolve duplicate people
      • Exporting Data for a Single Person
      • Exporting Data for Many People
      • Delete people and suppress profile IDs
      • Searching and filtering people
      • Filtering Your Activity Logs
      • Using your data index
      • How do I know what data I have available?
    • Manage devices
    • Shortcuts to external services
    • Overview: Objects vs Collections
      • Objects: how they work
      • Objects: video tutorials
      • Object types
      • Objects
      • Relationships
      • Import objects or relationships via CSV
      • Export objects or relationships via CSV
      • Objects and relationships in campaigns
      • Use objects in liquid
      • Upsell: monetize power users
      • Adoption: drive feature usage
      • Awareness: announce events
      • Conversion: activate people on your event waitlist
    • Collections
    • Segmentation Overview
    • Data-driven segments
    • Suggested segments New
    • Manual Segments
    • Segment mobile device audiences
    • Ad Audiences
    • Timestamp Conditions
    • Using JSON in segments
    • Timestamp Conditions FAQ
    • Timestamp Rules for Building Segments
    • Why don't people match 'within the past X days' conditions?
    • Setting Up Segments for Specific Purposes
    • Campaigns, broadcasts, and transactional messages
    • Editing live campaigns and broadcasts
      • Campaign concepts & settings
      • Create a campaign
      • Campaigns page
      • Triggers, filters, and frequencies
      • When to use filters
      • Goals
      • Exit conditions
      • Change the state of a campaign
      • Tags
        • Webhook campaigns
        • Send event
        • Batch update
        • Follow up on NPS responses
        • Sync customers from Stripe to Customer.io
        • Campaign for syncing Mixpanel cohorts
        • Slack notification for support tickets
      • Send a Welcome Email
      • Birthday and Anniversary Campaigns
      • Cart Abandonment
      • Double Opt-In
      • Onboarding Campaign
      • Trial expiration reminders
      • Cohort tests
      • Trigger campaigns based on Roles
      • RSS Feed Email Campaign
      • Reminders for multiple upcoming trips
      • Introduction to broadcasts
      • Newsletters
      • API-Triggered Broadcasts
      • Workflow builder
      • Using trigger data in your messages
      • Formatting API-Triggered Broadcasts
      • Common API-Triggered Broadcast errors
      • Getting Started: Key Concepts
      • Set up a transactional email
      • Set up a transactional push
      • Transactional examples
      • Common transactional API errors
      • Frequently Asked Questions
      • Transactional Campaigns
      • Workflow builder
      • Send event
      • Batch update
      • Branches
      • Action conditions
      • Holdout tests
      • A/B tests
      • Copy workflow items
        • Delivery Time Window
        • Wait Until...
        • Create or update person
        • Fix typos in attributes
        • Reformat timestamp attributes
      • Getting started
      • Set up your localization attribute
      • Localize campaigns
      • Localize broadcasts and newsletters
      • Default sending settings
      • Sending behavior options
      • Why did my campaign not send someone a message?
      • Queue Draft for Campaign QA
      • Send messages in users' timezones
      • Supported time zone formats
      • Message Limits
      • Email: Getting Started
      • Transitioning to Customer.io as a sender
      • Introduction to Creating Emails
      • Testing Your Emails
      • Email Attachments
        • Email Deliverability Best Practices
        • Domain Authentication
        • Delete a domain
        • Track links with your domain
        • IP addresses: shared vs dedicated
        • Email suppression lists
        • Deliverability Quick Guide
        • Google Postmaster Tools
        • Custom unsubscribe links (RFC 8058)
        • Authenticating for Apple Private Email Relay
        • Verify deliverable email addresses with Kickbox
          • Use Your Own SMTP Server
          • Using Multiple SMTP servers
          • Use your Mailgun Account
          • Use your Mailjet Account
          • Use your Mandrill Account
          • Use your Postmark Account
          • Use your SendGrid Account
          • Use your Sparkpost Account
          • Use your Oracle Dyn Account
        • Choosing the Right Email Editor
        • Drag-and-Drop Emails: The Basics
        • Drag-and-Drop Editor FAQ
        • Troubleshooting Your Drag-and-Drop Emails
        • Email code editor
        • Introduction to Email Layouts
        • Customizing Email Layouts
        • Archiving Old Layouts
        • HTML and CSS Email vs. Web
        • CSS pre-processing
        • AMP for email
        • Adding a view in browser link
        • Resources for templates, code, and best practices
        • Adapting Foundation's Basic template
        • Adapting MailChimp's Two-Column template
        • How do I add an avatar/logo to my emails?
        • Set Custom Email Headers
        • Set custom preheader/preview text
        • What does the Fake BCC option do?
        • Create Multiple From Addresses
        • Welcome Email Copy
        • Gmail Promotions
        • Send data from Customer.io to Salesforce, Highrise or another CRM
      • Get started
      • Integrate your app
      • Migrate from another provider
      • Registering device tokens
      • Send push notifications
      • Custom push payloads
      • Test push notifications
      • Push metrics and message statuses
      • Best practices for push notifications
      • Frequently Asked Questions
      • Troubleshooting mobile issues
      • Get Started
      • Tracking
      • Frequently Asked Questions
      • SMS Opt-Out Keywords
      • Send WhatsApp Messages
      • WhatsApp messages: Content Templates
      • Validate Mobile Phone Numbers
      • Get started
      • Set up your website
      • Anonymous messages Beta
      • Send in-app messages
      • Inline messages
      • Surveys
      • In-app metrics
      • Test your messages
      • Localize messages
      • In-App FAQ
        • NPS Surveys
        • Promotions and offers
        • Promote upcoming event
        • Milestones and achievements
        • Feature adoption
        • The visual editor
        • In-app component reference
        • Legacy in-app editor
      • Get Started
      • Send and receive data with webhooks
      • Send in-app messages using webhooks
      • Web push with webhooks
      • Send direct mail with Lob
      • Adding URL parameters to links
      • Checking Link Status
      • Link Tracking
      • Track universal links and app links in email
      • Overview of subscription options
      • Global unsubscribes
      • Subscription center
      • Brand your subscription pages
      • Subscription FAQs
      • Multi-language support for the subscription center
      • Migrate subscription preferences
      • Set preferences outside of the subscription center
    • Send from a personal support rep
    • Find messages using the Message Library
    • Image requirements
    • The Asset Library
    • Message Statuses
    • Deliveries & Drafts data
    • Liquid upgrade
    • Liquid syntax list
    • Personalizing messages with liquid
    • Personalize actions with JavaScript
    • Reusing content with snippets
    • Composer errors
    • Metrics Overview
    • Campaign and Broadcast Metrics
    • Workspace Dashboard
    • Run Reports
    • Understanding your A/B test results
    • Getting conclusive results from A/B tests
    • Failed and attempted messages
    • Integrations Overview
      • Data-in Overview
        • Segment destination
        • Segment destination (classic)
        • Rudderstack
        • mParticle
        • Reverse ETL Overview
        • Amazon Redshift
        • Google BigQuery
        • Microsoft SQL server
        • MySQL
        • PostgreSQL
        • Snowflake
      • Integration Libraries
      • Using Zapier with Customer.io
      • Using Customer.io with Rails
      • Zoho integration
      • Hubspot integration
      • Backfill historical data
      • HTTPS Link Tracking
      • Invalid API Requests
      • Data-out Overview
        • Amplitude
        • Mixpanel
        • KISSMetrics
        • Segment: Customer.io as a data source
        • Rudderstack
        • Stitch
        • Getting Started
        • Amazon Redshift
        • Amazon S3
        • Azure blob storage
        • Google BigQuery
        • Google Cloud Storage
        • Snowflake
        • Yandex
      • Reporting Webhooks
      • Connect forms to your workspace
      • Jotform
      • Typeform
      • Facebook Lead Ads
      • Use Google Forms or Jotforms with Zapier
    • Getting Started
    • How it works
    • Filtering and mapping actions
    • Troubleshooting
    • Data Compliance and Privacy
    • Introduction to sources
      • Understanding source calls
      • Identify
      • Group
      • Page
      • Screen
      • Track
      • Alias
      • Common fields
    • Custom events
      • Understanding Semantic Events
      • A/B Test events
      • Customer.io events
      • Ecommerce Events
      • Email events
      • Live chat events
      • Mobile App Lifecycle Events
      • Video playback events
    • Source catalog
      • Data Pipelines API
      • Journeys Message Metrics
      • Mobile App Sources
        • Getting Started
        • Method Reference
        • Migrate from another service
        • Managing identities
        • Cookies and identity management
        • Utility Methods and Performance
        • In-app messages
        • Proxying the JavaScript Source
        • Connect Journeys data to destinations
        • Mapping Journeys to Data Pipelines
        • Advanced: transform data
        • About Reverse ETL
        • Amazon Redshift
        • Google BigQuery
        • Microsoft SQL Server
        • MySQL
        • PostgreSQL
        • Snowflake
        • Getting Started
        • Salesforce with Journeys
        • Mapping data to destinations
        • Scheduled syncs
        • Deleting Data
        • Node.js
        • Python
        • Go
    • Getting Started
    • Add a destination
    • Actions
    • Resend past data
    • Cloud Storage and Warehouses
    • Destination Catalog
      • Actable Predictive
      • Adobe Target
      • Algolia Insights
      • Amazon Redshift
      • Amazon S3
      • Amplitude
      • Attio
      • Bing Ads
      • Braze
      • Braze Cohorts
      • Clevertap
      • Close
      • CommandBar
      • Cordial
      • Criteo Audiences
      • Customer.io Journeys
      • Facebook Conversions API
      • Friendbuy
      • FullStory
      • Gainsight PX
      • Google Ad Conversions
      • Google Ads (Gtag)
      • Google Analytics
      • Google BigQuery
      • Google Cloud Storage
      • Google Sheets
      • Google Tag Manager (GTM)
      • Heap
      • Hubspot
      • Intercom
      • Koala
      • LaunchDarkly
      • LiveLike
      • LogRocket
      • Meta (Facebook) Pixel
      • Metronome
      • Mixpanel
      • Moengage
      • MS Azure Blob Storage
      • Pinterest Conversions
      • Pipedrive
      • PlayerZero
      • Qualtrics
      • Ripe
      • Salesforce
      • SalesWings
      • Segment
      • SendGrid Marketing Campaigns
      • Slack
      • Snowflake
      • Sprig
      • Talon.One
      • TikTok Conversions
      • Twilio
      • Twilio Engage Messaging
      • Twilio Studio
      • Twitter Pixel
      • Visual Website Optimizer (VWO)
      • Webhooks
      • Wisepops
      • Zendesk
  • Account Verification
    • How We Bill
    • Reducing billing overages
    • Payment Problems
    • Canceling Your Account
    • Plan Features
    • Edit Account Information
    • Manage team members
    • Manage your API credentials
    • Security Best Practices
    • Two-Factor Authentication
    • Single Sign-on (SSO)
    • Account Regions (US and EU)
    • Enable experimental features
    • Redeem Parcel upgrade
    • Workspaces in Customer.io
    • Date and Time Data in Customer.io
    • Case sensitivity and your data
    • Session cookies and expiration
    • Allowlist our IP addresses
    • Customer.io, GDPR, and you!
    • Security
    • Mobile and App Store Privacy
    • Privacy
    • Respecting your users' privacy
    • Customer.io Security Qualifications
    • Troubleshooting login and browser issues
    • Create a HAR file for help troubleshooting
  • Data Pipelines API
  • Journeys Track API
  • Journeys App API
  • Journeys Webhooks
Android
  • Quick Start Guide
    • How it works
    • Authentication
    • Packages and Configuration Options
    • Troubleshooting
    • Identify people
    • Screen tracking
    • Mobile Lifecycle events
    • Anonymous activity
    • Track events
    • Deep Links
    • Push notifications
    • Push service certificates
    • Test your push implementation
    • In-app messages
    • In-app event listeners
    • Page rules
    • 3.x -> 4.x
    • 2.x -> 3.x
    • Changelog
    • Get Started
    • Identify people
    • Track events
    • Push notifications
    • In-app messages
    • Test support
    • Migrate from an earlier version
    • Troubleshooting
    • Changelog
    • Get Started
    • Identify people
    • Track events
    • Push notifications
    • Rich push notifications
    • Test support
    • Migrate from an earlier version
    • Changelog
iOS
  • Quick Start Guide
    • How it works
    • Authentication
    • Packages and Configuration Options
    • Troubleshooting
    • Testing
    • Identify people
    • Track events
    • Screen tracking
    • Mobile Lifecycle events
    • Anonymous activity
    • Set up push notifications
    • Set up rich push
    • Deep Links
    • Push metrics
    • Sound in push notifications
    • Push service certificates
    • Test your push implementation
    • Set up in-app messaging
    • Inline in-app messages Early Access
    • Page rules
    • In-app event listeners
    • 2.x -> 3.x
    • 1x -> 2.x
    • Changelog
    • Get Started
    • Identify people
    • Track events
    • Push notifications
    • Rich push notifications
    • In-app messages
    • Test support
    • Changelog
    • Get Started
    • Identify people
    • Track events
    • Push notifications
    • In-app messages
    • Test support
    • Update from 2.10 to 2.11
    • Migrate from an earlier version
    • Troubleshooting
    • Changelog
Flutter
  • Quick Start Guide
    • How it works
    • Authentication
    • Configuration Options
    • Troubleshooting
    • Identify people
    • Mobile Lifecycle events
    • Anonymous activity
    • Screen tracking
    • Track events
    • Set up push notifications
    • Deep links
    • Handling multiple push providers
    • Capture push metrics
    • In-app messages
    • Handling and dismissing actions
    • Update iOS
    • Troubleshooting
    • Changelog
    • Upgrade to Flutter 2.x
    • Changelog
    • Get Started
    • Identify people
    • Track events
    • Update Flutter SDK
      • Set up push notifications
      • Deep Links
      • Handling Multiple Push Providers
      • Capture Push Metrics
      • In-app messages
      • Handling and dismissing actions
      • Update iOS
      • Troubleshooting
      • Changelog
Javascript
  • Get started
  • Identify people
  • Track and page events
  • In-app messages
  • Content Security Policy (CSP)
React Native
  • Quick Start Guide
    • How it works
    • Authentication
    • Packages and Configuration Options
    • Troubleshooting
    • Identify people
    • Track events
    • Screen tracking
    • Mobile Lifecycle events
    • Anonymous activity
    • Set up push notifications
    • Deep Links
    • Handling Multiple Push Providers
    • Capture Push Metrics
    • Set up in-app messages
    • Handling and dismissing actions
    • 3.4x -> 4.x
    • 3.x -> 3.4
    • 2.x -> 3.x
    • Changelog
    • Get Started
    • Identify people
    • Track events
      • Set up push notifications
      • Deep Links
      • Handling Multiple Push Providers
      • Capture Push Metrics
      • Set up in-app messages
      • Handling and dismissing actions
      • Migrate from an earlier version
      • Troubleshooting
      • Changelog
    • Get Started
    • Identify people
    • Track events
      • Set up push notifications
      • Deep Links
      • Handling Multiple Push Providers
      • Capture Push Metrics
      • Set up in-app messages
      • Handling and dismissing actions
      • Migrate from an earlier version
      • Update to version 3.4
      • Troubleshooting
      • Changelog
Expo
  • Quick Start Guide
    • How it works
    • Authentication
    • Packages and Configuration Options
    • Troubleshooting
    • Identify people
    • Track events
    • Screen tracking
    • Mobile Lifecycle events
    • Anonymous activity
    • Set up push notifications
    • Deep Links
    • Capture Push Metrics
    • Set up in-app messages
    • Handle in-app message responses
    • 1x -> 2.x
    • Changelog
    • Get Started
    • Identify people
    • Track events
      • Set up push notifications
      • Deep Links
      • Capture Push Metrics
      • Set up in-app messages
      • Handling and dismissing actions
      • Troubleshooting
      • Changelog

    Retrieve and update language variants for messages through our API

    Released December 13, 2023

    You can now retrieve and update translations of messages using our App API. This includes campaigns, newsletters, API-triggered broadcasts, and transactional messages.

    Learn more

    Copied to clipboard!
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