Marketing Automation
Customer.io
API integration
Ship Marketing Automation features without building the integration. Full Customer.io API access via Proxy, normalized data through Unified APIs — extend models and mappings to fit your product.
Talk to usUse Cases
Why integrate with Customer.io
Common scenarios for SaaS companies building Customer.io integrations for their customers.
Sync billing events to trigger automated dunning campaigns
Subscription and billing platforms can push payment failure events and account status changes into their customers' Customer.io workspaces, enabling marketers to build omnichannel dunning journeys without developer intervention.
Power lifecycle marketing with real-time product behavior data
Product-led SaaS companies can pipe behavioral events like feature adoption milestones or onboarding completions directly into Customer.io, letting their users' marketing teams build triggered campaigns based on what users actually do in the product.
Surface email engagement data inside customer success dashboards
CS platforms can pull message delivery, open, and click data from Customer.io so account managers see the full picture of marketing touchpoints before renewal conversations — without switching tools.
Sync audience cohorts for targeted in-app and email campaigns
Analytics and engagement platforms can push dynamically computed user segments into Customer.io, giving marketers precise audience targeting for campaigns without manual list uploads.
Keep contact profiles enriched with live SaaS platform attributes
Any B2B SaaS can continuously upsert user attributes like health scores, plan tiers, or usage metrics into Customer.io contacts, ensuring marketers always segment on fresh, accurate data.
What You Can Build
Ship these features with Truto + Customer.io
Concrete product features your team can ship faster by leveraging Truto’s Customer.io integration instead of building from scratch.
Bi-directional contact and attribute sync
Continuously upsert user profiles with custom attributes like MRR, plan tier, and last activity date into your customers' Customer.io workspaces, and read contact data back for display in your own UI.
Behavioral event forwarding engine
Push named product events (e.g., invoice_failed, feature_activated) from your platform into Customer.io so end users can use them as journey entry triggers without writing code.
Campaign and message engagement timeline
Fetch message-level delivery, open, click, and unsubscribe metrics from Customer.io and render them as a native activity timeline or ROI dashboard inside your product.
Segment audience sync
Create and update Customer.io segments from cohorts defined in your platform, enabling marketers to target precise user groups for campaigns without manual CSV imports.
Workspace-aware environment routing
Read workspace metadata from Customer.io to let end users map your platform's staging and production environments to the correct Customer.io workspace during setup.
Transactional message trigger with dynamic variables
Let your users fire API-triggered transactional emails or SMS through Customer.io, passing custom Liquid variables like secure links or invoice amounts at send time.
Unified APIs
Unified APIs for Customer.io
Skip writing code for every integration. Use Truto’s category-specific Unified APIs out of the box or customize the mappings with AI.
Unified Marketing Automation API
Campaigns
The campaign represent a campaign in the remote system.
Contacts
The contact represent a contact in the remote system.
Messages
The message represent a message in the remote system.
Segments
Represents a segment of contacts in the remote system.
Templates
The template represent a template for marketing asset in the remote system.
Users
The user represent a user in the remote system.
Workspaces
The workspace represent a workspace in the remote system.
How It Works
From zero to integrated
Go live with Customer.io in under an hour. No boilerplate, no maintenance burden.
Link your customer’s Customer.io account
Use Truto’s frontend SDK to connect your customer’s Customer.io account. We handle all OAuth and API key flows — you don’t need to create the OAuth app.
We handle authentication
Don’t spend time refreshing access tokens or figuring out secure storage. We handle it and inject credentials into every API request.
Call our API, we call Customer.io
Truto’s Proxy API is a 1-to-1 mapping of the Customer.io API. You call us, we call Customer.io, and pass the response back in the same cycle.
Unified response format
Every response follows a single format across all integrations. We translate Customer.io’s pagination into unified cursor-based pagination. Data is always in the result attribute.
FAQs
Common questions about Customer.io on Truto
Authentication, rate limits, data freshness, and everything else you need to know before you integrate.
What authentication method does Customer.io use?
Customer.io uses API key-based authentication. The Track API uses a Site ID and API Key pair, while the App API uses a separate App API Key. Truto handles storing and managing these credentials so your end users authenticate once during the connection flow.
Does Customer.io have separate APIs for reading and writing data?
Yes. Customer.io splits its API into two distinct surfaces: the Track API (and Pipelines API) for ingesting contacts, attributes, and events, and the App API for reading campaigns, messages, segments, and workspace metadata. Truto abstracts this split behind a single unified interface.
Are Customer.io tools available today in Truto?
Customer.io integration tools are built on request. Once requested, Truto builds and exposes them through the Unified Marketing Automation API, covering resources like Campaigns, Contacts, Messages, Segments, Templates, Users, and Workspaces.
How does Truto handle Customer.io's rate limits and pagination?
Truto manages rate limiting and pagination automatically. When you query resources like messages or contacts through the Unified API, Truto handles page cursors and respects Customer.io's rate limits transparently, so your application never needs to deal with retry logic or partial responses.
Can I sync custom attributes and events that aren't part of a standard schema?
Yes. Customer.io supports highly flexible custom attributes on contact profiles and arbitrary named events. Truto's Unified API passes through custom fields and event properties, so your integration isn't limited to a fixed set of attributes.
What Unified API resources map to Customer.io capabilities?
Truto's Unified Marketing Automation API covers Campaigns, Contacts, Messages, Segments, Templates, Users, and Workspaces — mapping to Customer.io's core concepts for managing audiences, triggering communications, and reading engagement data.
Customer.io
Get Customer.io integrated into your app
Our team understands what it takes to make a Customer.io integration successful. A short, crisp 30 minute call with folks who understand the problem.
Talk to us