Customer.io

Customer.io

Paid

Event-driven messaging platform for targeted email, push, SMS, and in-app campaigns

๐ŸŒฑLead Nurturing

About Customer.io

Customer.io is a messaging automation platform built around event-driven data, allowing product and marketing teams to trigger highly targeted emails, push notifications, SMS, and in-app messages based on real-time user behavior. Its flexible data model and powerful Liquid templating make it a favorite among SaaS and mobile app companies.

ยท
Updated April 2026

What's Great

  • โœ“Event-driven architecture triggers messages based on real-time user behavior
  • โœ“Supports email, push notifications, SMS, and in-app messaging channels
  • โœ“Liquid templating provides extremely flexible message personalization
  • โœ“API-first design integrates easily with custom tech stacks

Watch Out For

  • !Requires developer resources for initial setup and event tracking configuration
  • !Not designed for marketers who want a no-code, drag-and-drop experience
  • !Pricing is based on profile count which can get expensive at scale
  • !Less out-of-the-box e-commerce functionality than Klaviyo or Drip

Common Use Cases

1

SaaS company triggering onboarding emails based on in-app user actions

2

Mobile app team sending push notifications based on real-time engagement events

3

Product-led growth company building event-driven lifecycle campaigns

Pricing Model

Paid

Paid subscription required. Check the website for current pricing and free trials.

Category

Lead Nurturing

Platforms focused on scoring, segmenting, and nurturing leads through personalized multi-touch journeys.

Tags

event-driven messagingbehavioral automationpush notificationsSaaSin-app messaging

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