Customer.io
Behavioural messaging for SaaS and digital products.
Overview
Customer.io is the platform for SaaS companies and digital products that need to send the right message at exactly the right moment, based on what users actually do in your product.
Key Features
What makes Customer.io powerful
Event-Based Triggers
Send messages based on any event your product tracks — page views, feature usage, subscription changes, or custom actions — with millisecond latency.
Visual Workflow Builder
Build complex multi-step journeys with branching logic, time delays, and A/B splits using a visual canvas that non-developers can understand and maintain.
Liquid Templating
Use Liquid templating to personalise every message with dynamic content, conditional blocks, and computed attributes drawn directly from your data.
Multi-Channel Campaigns
Coordinate email, SMS, push notifications, and in-app messages within a single campaign flow, ensuring consistent messaging across every touchpoint.
Switching to Customer.io was the best platform decision we made. The event-based model let us finally build the onboarding sequence we'd always wanted but couldn't achieve with our old ESP.
James Okoro
Co-founder & Head of Strategy
Best Fit
Who Customer.io works best for
Every platform has a context where it truly shines. Here's where we see Customer.io deliver the most consistent results.
SaaS Companies
Customer.io was designed for SaaS. Its event-driven architecture maps directly to product usage data, making it ideal for onboarding sequences and feature adoption campaigns.
Digital Products and Apps
Any product with meaningful user behaviour data — sign-ups, feature usage, inactivity — can leverage Customer.io to automate the right message at the right moment.
Technical Marketing Teams
Teams comfortable with APIs and data will get the most from Customer.io's flexibility. It rewards investment in clean data with far more precise targeting than traditional ESPs.
What we do
How Flow works with Customer.io
Customer.io acts as your product-to-communication layer, translating user behaviour and lifecycle events into automated, personalised messages across email, SMS, push, and in-app.
Workspace setup and event schema design
Integration with your product via API or Segment
Lifecycle campaign architecture (onboarding, activation, retention, re-engagement)
Segment and attribute-based personalisation
Transactional and triggered messaging setup
Data validation and testing framework
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