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All Customer.io Docs

A/B Test Event Setup

Operator-focused guidance for sending A/B test assignment events into Customer.io, resolving identity correctly, and mapping properties so segments and triggers stay accurate for retention flows.

A/B Tests

Run A/B tests in Customer.io to compare variants, measure lift, and standardize winners across key journeys with clean tracking and rules.

Accessibility Fixes

Accessibility fixes in Customer.io help clean up email HTML for better rendering, improved screen reader support, and stronger clicks across key flows.

Action Filtering Config

Operator-focused guidance on filtering and mapping Customer.io actions to send clean, usable data to ad platforms, warehouses, and analytics—so you can amplify retention campaigns and improve LTV.

Operator-focused guidance for using Customer.io Action Triggers in code mode to push high-intent customer and event data to ad platforms, warehouses, and analytics—powering cart recovery, repeat purchase, and reactivation amplification.

Ad Audiences

Learn how Ad Audiences in Customer.io syncs high-intent segments to ad platforms, automates exclusions, and keeps targeting current as customers convert.

Add or Update People

Learn how to add or update people in Customer.io to keep identities, attributes, and events accurate—powering reliable segments, personalization, and timing.

Add & Preview Liquid

Learn how to add and preview Liquid in Customer.io to QA personalization, catch missing data, validate logic, and ship reliable dynamic templates.

Adobe Target Integration

Operational guide to push Customer.io segments and events into Adobe Target so you can personalize onsite experiences, amplify retention campaigns, and increase repeat purchase and recovery.

Advanced Integration Config

Practical operator guidance for Customer.io Advanced Integrations (Data Out): sync audiences to ad platforms, stream events to analytics/warehouse, and amplify retention campaigns with reliable downstream activation.

AI Segment Builder

Use AI Segment Builder in Customer.io to turn shopper behavior into high-intent audiences fast—powering cart recovery, upsells, and reactivation.

Algolia Insights Config

Practical operator guidance for sending Customer.io behavioral data to Algolia Insights so you can improve product discovery, amplify retention campaigns, and drive repeat purchase with better search and recommendations.

Alias Identity Config

Operator guidance for implementing Customer.io Alias Spec: how alias events enter Customer.io, how profiles merge, and how to keep cart recovery + repeat purchase triggers firing correctly across guest-to-known transitions.

Amazon Redshift Data

How to pipe warehouse-grade events and attributes from Amazon Redshift into Customer.io so segments stay accurate and retention automations (cart recovery, repeat purchase, winback) trigger reliably.

Amazon Redshift Data Export

Practical guide to sending Customer.io people, events, and campaign outcomes into Amazon Redshift so you can build better audiences, measure incrementality, and amplify retention programs across email, SMS, and paid.

Amazon Redshift Data Push

Operational guide to sending Customer.io data into Amazon Redshift for audience syncing, retention reporting, and campaign amplification across ads and analytics.

Amazon S3 Data Export

Push Customer.io people, events, and delivery data into Amazon S3 so you can power warehouse models, ad audiences, and retention reporting that improves repeat purchase, recovery, and reactivation.

Amazon S3 Data Push

Set up Customer.io Amazon S3 (Advanced) to push customer and event data to S3 for audience syncing, LTV analysis, and campaign amplification across ads and analytics.

AMP for Email

Use AMP for Email in Customer.io to add interactive inbox experiences like size selection, bundles, and forms—reducing clicks and boosting conversions.

Amplitude Data Export

Practical setup and operating guidance for sending Customer.io audiences and events into Amplitude so you can analyze retention, power reactivation, and amplify campaigns with cleaner downstream measurement.

Amplitude Message Metrics

How to push Customer.io message performance into Amplitude Message Metrics so you can build audiences, optimize retention flows, and amplify campaigns with ads and analytics.

Analysis Pages and Reports

Use Customer.io analysis pages and reports to measure journey performance, find drop-offs, compare variants, and optimize timing and offers for revenue.

Android Notification Channels

Operator-focused guide to implementing Android notification channels with the Customer.io Android SDK—so your push delivery, preferences, and identity stitching stay clean for cart recovery, repeat purchase, and reactivation.

Android Notification Channels 1

Operator-focused guide to implementing Android notification channels with the Customer.io Android SDK—so push delivery, segmentation, and identity stitching stay clean for cart recovery, repeat purchase, and reactivation.

Android Notification Channels Setup

Operator-grade guidance for implementing Android push notification channels with the Customer.io Android SDK—tracking, identity stitching, and channel strategy for cart recovery, repeat purchase, and reactivation.

Android Push Channel Config

Operator-focused guide to implementing Android notification channels with the Customer.io Android SDK—so cart recovery, reorder nudges, and winbacks route to the right channel with clean identity stitching and accurate tracking.

Android Push Channels

Operator-focused guide to implementing Android push notification channels with the Customer.io Android SDK—installation, identify, event tracking, and channel strategy for cart recovery, repeat purchase, and reactivation.

Android Push Channels 1

Operator-focused guide to setting up Android push notification channels with the Customer.io Android SDK—so cart recovery, replenishment, and winback pushes route correctly and track cleanly across devices.

Announce Events (Objects)

Learn how to announce events using Customer.io Objects: model events as structured data, relate people, personalize messages, and automate reminders.

Anonymous Activity

Capture on-site behavior before a visitor identifies, then merge events into known profiles to power accurate segmentation, journeys, and recovery messaging.

Anonymous Activity Capture

Operator-focused guide to implementing Customer.io anonymous activity with mobile/web SDKs: accurate pre-login tracking, identity stitching on login, and retention use cases like cart recovery and reactivation.

Anonymous Activity SDK Tracking

Operator guide to implementing Anonymous Activity with Customer.io SDKs: track pre-login browsing and cart behavior, stitch identities on login, and power higher-performing retention automations.

Anonymous Activity Tracking

Track pre-login browsing and cart behavior with Customer.io SDK anonymous activity, then stitch it to known profiles on signup/login to improve cart recovery, repeat purchase, and reactivation targeting.

Anonymous Activity Tracking 1

Operator guide to tracking anonymous activity with Customer.io SDKs: install, identify, track events, and stitch pre-login behavior to power cart recovery, repeat purchase, and reactivation.

Anonymous Activity Tracking 2

Operator guide to implementing Customer.io anonymous activity with web/mobile SDKs—accurate pre-login tracking, identity stitching, and retention-ready events for cart recovery and repeat purchase.

Anonymous Activity Tracking 3

Operator guide to implementing Customer.io anonymous activity via SDK: track pre-login browsing and cart behavior, stitch identities on login, and power cart recovery, repeat purchase, and reactivation.

Anonymous Activity Tracking 4

Operator-focused guide to implementing anonymous activity with Customer.io SDKs—track browse and cart events before login, stitch identity on signup, and power higher-converting cart recovery and repeat purchase flows.

Anonymous Activity Tracking 5

Operator guide to implementing Customer.io anonymous activity with mobile/web SDKs: track pre-login behavior, stitch identities on signup, and power cart recovery, reactivation, and repeat purchase flows with accurate event data.

Anonymous Activity Tracking 6

Operator guide to implementing anonymous activity with Customer.io SDKs—track pre-login behavior, stitch identity on signup, and power cart recovery, product browse retargeting, and reactivation flows.

Anonymous Events

Capture pre-identification shopper behavior in Customer.io with anonymous events, then merge it into profiles to trigger smarter browse and cart recovery.

Anonymous Messages

Use anonymous messages in Customer.io to target visitors before they identify, trigger on-site prompts from behavior, and merge activity into profiles.

Anonymous People

Learn how Anonymous People in Customer.io capture pre-identification behavior, merge it into known profiles, and power higher-converting journeys.

Anonymous Session Authentication

Practical guidance for implementing Customer.io authentication in your SDK tracking so logins, device IDs, and anonymous sessions stitch cleanly—powering cart recovery, repeat purchase, and reactivation.

API Call Simulator

Operator guidance for using Customer.io’s API Call Calculator to pressure-test Track/App API event volume, identity resolution, and segmentation reliability for cart recovery, repeat purchase, and reactivation.

API-Triggered Broadcast Errors

Learn the most common API-triggered broadcast errors in Customer.io, why they happen, and how to fix identity, payload, and deliverability issues fast.

API-Triggered Broadcasts

Learn how API-triggered broadcasts in Customer.io send real-time, targeted messages for restocks, flash sales, drops, and shipping updates.

App Event Tracking

Operator guidance for implementing Customer.io SDK tracking: install, identify users, track events, stitch anonymous-to-known behavior, and keep retention journeys accurate for cart recovery, repeat purchase, and reactivation.

Apple Private Email Relay Authentication

Set up Apple Private Email Relay authentication in Customer.io to reduce bounces from Hide My Email addresses and improve deliverability for key flows.

Archiving Old Layouts

Archive old layouts in Customer.io to keep your template library clean, prevent outdated creative in key sends, and speed up production workflows.

Assets Library

Centralize and reuse images, logos, GIFs, and downloadable files in Customer.io’s Assets Library to keep email production fast and brand-consistent.

Attio Data Export

Operational guide to sending Customer.io segments and events into Attio so your team can sync audiences, trigger outbound touches, and amplify retention campaigns with clean data flow and orchestration.

Authentication Tracking

Practical guide to Customer.io authentication for SDK-based tracking: install, identify users, stitch anonymous sessions, and send accurate events that power cart recovery, repeat purchase, and reactivation.

Azure Blob Data Export

Practical setup and ops guidance for exporting Customer.io data to Azure Blob Storage so you can power ad audiences, warehouse analytics, and retention amplification without breaking your segmentation or data flow.

Azure Blob Data Export 1

Operational guidance for exporting Customer.io people, events, and delivery data to Azure Blob Storage so you can power ad audiences, warehouse reporting, and retention amplification.

Batch Update

Learn how Batch Update in Customer.io quickly updates many customer profiles at once to fix segmentation, consent flags, and campaign eligibility fast.

Behavioral Data Capture

Operator guidance for sending events into Customer.io: event design, identity resolution, payload mapping, and the practical setup that keeps cart recovery, repeat purchase, and reactivation triggers accurate.

BigQuery Data Setup

Operator guidance for sending BigQuery data into Customer.io with clean identity resolution, event mapping, and segmentation reliability for cart recovery, repeat purchase, and reactivation.

Bing Ads Audience Sync

Operator-focused guide to pushing Customer.io segments into Bing Ads/Microsoft Advertising for cart recovery, repeat purchase, and reactivation. Includes setup steps, audience strategy, and common pitfalls.

Birthday & Anniversary Campaigns

Set up birthday and anniversary automations in Customer.io with clean date fields, smart segments, and purchase exits to drive repeat revenue on schedule.

Branch Types

Learn how Branch Types in Customer.io route customers by behavior, attributes, and tests to personalize Journeys, improve conversions, and lift revenue.

Brand & Campaign Registration

Set up brand and campaign registration in Customer.io to verify your sending identity, meet carrier rules, and protect SMS deliverability as you scale.

Branded Subscription Pages

Create on-brand preference and unsubscribe pages in Customer.io to reduce churn, protect deliverability, and guide shoppers to opt down instead of leaving.

Braze Cohorts Data Export

Operator-focused guidance for sending Customer.io segments to Braze Cohorts so you can sync audiences, amplify retention campaigns, and keep downstream targeting clean.

Braze Data Out Setup

Operational guide to push Customer.io segments and events into Braze so you can amplify retention campaigns (cart recovery, repeat purchase, reactivation) with consistent audiences and downstream orchestration.

Broadcasts

Learn how to use Customer.io Broadcasts for one-to-many sends: build segments, apply exclusions, schedule sends, QA, and measure revenue impact.

Campaign & Broadcast Metrics

Learn how to use Customer.io campaign and broadcast metrics to diagnose deliverability, engagement, and conversion drop-offs and optimize revenue.

Campaign Concepts & Settings

Learn how campaign triggers, filters, frequency caps, schedules, and goals work in Customer.io to control entry, timing, and conversions.

Campaign Entry Troubleshooting

Learn how to troubleshoot campaign entry in Customer.io by validating triggers, filters, frequency rules, identity resolution, and event payloads.

Campaign Journeys

Learn how to build Campaign Journeys in Customer.io: set entry triggers, eligibility filters, branching logic, and goals to control timing and conversions.

Campaign Scheduling

Learn how to schedule Customer.io campaigns to control start times, send windows, and workflow timing—so messages align with promos and operations.

Campaigns Page

Learn how to use the Campaigns page in Customer.io to monitor live vs paused automations, manage tags, troubleshoot issues, and keep revenue flows healthy.

Campaigns vs Broadcasts vs Transactional

Learn how campaigns, broadcasts, and transactional messages work in Customer.io—when to use each, how to set triggers, and keep reporting clean.

Cart Abandonment

Set up cart abandonment in Customer.io with clean cart events, reliable purchase exits, and personalized email/SMS follow-ups that recover revenue.

CDP API Comparison

Operator guidance for D2C retention teams choosing between Customer.io Pipelines and Track (CDP) API. Learn backend mechanics, payload patterns, and how to wire events for cart recovery, repeat purchase, and reactivation.

Change Campaign State

Learn how to change a campaign’s state in Customer.io (draft, active, paused, stopped) to prevent bad sends, protect margin, and fix issues fast.

Changelog Setup

Operator guidance for using the Customer.io changelog to keep your iOS/Android/Web SDK tracking accurate—identity stitching, event stability, and retention automations that don’t break.

Changelog Updates

Turn Customer.io changelog updates into retention wins by tightening SDK tracking, identity stitching, and event hygiene—so cart recovery, repeat purchase, and reactivation flows stay accurate.

Changelog Updates 1

Turn Customer.io changelog updates into retention wins by validating SDK tracking, identity stitching, and event accuracy before you ship new cart recovery, repeat purchase, and reactivation flows.

Checking Link Status

Learn how to check link status in Customer.io to catch broken, redirected, or mis-tracked URLs before sends—protecting conversion and attribution.

Classic Track API Setup

Operator-focused guide to sending events and profile data into Customer.io via the Classic Track API—identity resolution, event mapping, and setup steps to keep cart recovery, repeat purchase, and reactivation triggers firing correctly.

Clevertap Data Out Config

Practical operator guidance for pushing Customer.io segments and event data into Clevertap to amplify retention: cart recovery, repeat purchase, reactivation, and LTV—plus setup steps, orchestration tips, and common pitfalls.

Close Data Out Trigger

Operator guide to Customer.io Close (Data Out): sync churn-risk and high-LTV audiences to ad platforms, warehouses, and analytics to amplify retention campaigns and measure downstream impact.

Cohort Tests

Use cohort tests in Customer.io to measure true incrementality with holdout control groups, proving revenue lift from automations beyond clicks.

Collaboration

Streamline reviews with Collaboration in Customer.io: collect in-editor feedback, track versions, prevent overwrites, and ship revenue-safe updates faster.

Collections

Learn how Customer.io Collections model products, carts, orders, and subscriptions to power dynamic personalization for cart recovery and lifecycle flows.

CommandBar Data Out Setup

Operational guide to using CommandBar with Customer.io as a data-out motion: sync high-intent audiences to ads/analytics, amplify cart recovery and repeat purchase, and keep data flows clean.

Common Field Mapping

Operator guidance for implementing Customer.io common fields (email, phone, created_at, unsubscribed, etc.) so events resolve to the right person, segments stay accurate, and retention automations trigger reliably.

Compliance Privacy Setup

Practical guidance for setting up data compliance and privacy in Customer.io without breaking retention performance—covering consent, suppression, deletion requests, and data flow patterns for D2C teams.

Composer Errors

Learn what causes Composer errors in Customer.io and how to prevent broken renders with defensive Liquid, safer loops, payload standards, and QA.

Conclusive A/B Test Results

Learn how to design A/B tests in Customer.io that reach statistical confidence, avoid audience contamination, and measure revenue impact accurately.

Conditionals & Directives

Use Customer.io conditionals and directives to personalize email and SMS with dynamic content, smart fallbacks, and clean logic driven by real-time data.

Conditions

Use Conditions in Customer.io to branch journeys by attributes, events, and objects—protect margin, improve conversion, and personalize messaging at scale.

Connect Email to Automation

Connect a single email asset to automation steps in Customer.io so updates sync across journeys, reduce duplicates, speed launches, and improve QA.

Content Security Policy Config

Operator guidance for implementing Content Security Policy (CSP) without breaking Customer.io data-in: event tracking, identity resolution, segmentation accuracy, and trigger reliability for D2C retention.

Content Templates

Learn how Content Templates in Customer.io standardize email layouts, speed up lifecycle builds, and keep branding consistent across campaigns and flows.

Copy Workflow Items

Learn how to copy workflow items in Customer.io to reuse proven journey blocks faster, keep logic consistent, and scale retention workflows with Propel.

Cordial Audience Sync

Practical operator guide to pushing Customer.io segments into Cordial for audience syncing, suppression, and downstream activation that improves cart recovery, repeat purchase, and reactivation.

Create a Campaign

Learn how to create a campaign in Customer.io with the right triggers, filters, messaging, and goals to drive measurable revenue and avoid over-sending.

Create Component from Scratch

Learn how to create a component from scratch in Customer.io to standardize reusable email modules, speed production, and keep brand styling consistent.

Create or Update Person

Keep profiles current by creating or updating people in Customer.io so segments, suppressions, and journeys trigger off fresh attributes and behavior.

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