Customer IO

Automate powerful behavioral messages for web & mobile apps

★★★★★ 4.6/5 from 24 reviews

Email marketing Marketing automation platforms Customer loyalty platforms

What is Customer IO?

A tool that lends you a helping hand to craft ideal customer interaction for your clients. It is a B2C solution that connects emails to mobile phones and helps in sending all types of messages across all platforms.

Pros & Cons

Pros

Behavioral messaging
Personalized communication
Automation capabilities
Free startup plan
Segmentation
User engagement
Customer support
Email builder
Multi-channel messaging
Workflow customization

Cons

Complex interface
Email editor issues
Inflexible journeys
Limited CMS features
Slow UI

Tool Details

Categories	Email marketing, Marketing automation platforms, Customer loyalty platforms
Website	customer.io
Became Popular	January 29, 2014
Platforms	Web
Social	Twitter · Instagram

Recent Reviews (5)

Vova Jan 14, 2025

★★★★★

We made the switch to Customer.io after trying out Loops and Userlist, and it’s been a great decision. It’s powerful enough to handle all our SaaS communication needs, yet still easy to use. It works smoothly across multiple integrations and makes personalizing content simple. On top of that, the support team is always quick to respond and super helpful.

Danielle May 13, 2025

★★★★★

Our new email campaign provider with a user-friendly interface, clear visual logic for campaign triggers, and lots of customization. The level of flexibility has encouraged us to be more creative and specific with how we reach out to our customers and potential leads.

Ali Dec 29, 2024

★★★★★

Customer IO stands out for its powerful automation capabilities and behavioral messaging tools. It allows us to create highly personalized communication workflows, improving engagement and retention effortlessly.

User engagement Behavioral messaging Automation capabilities Personalized communication

Erik May 31, 2024

★☆☆☆☆

We use CustomerIO to send emails to our customers. It's continuously painful. The email editor is a mess. The deliveries and draft features fail to show everything.

Email editor issues

Holly Mar 17, 2025

★☆☆☆☆

Not suitable for small teams without dedicated marketing and tech leads. Inflexible journeys and unnecessarily confusing UI.

Complex interface Inflexible journeys

Frequently Asked Questions about Customer IO

When did Customer IO become popular?

Customer IO became popular around January 29, 2014.

What are the main advantages of using Customer IO?

The top advantages of Customer IO include: behavioral messaging, personalized communication, automation capabilities, free startup plan, segmentation.

What are the disadvantages of Customer IO?

Some reported disadvantages of Customer IO include: complex interface, email editor issues, inflexible journeys, limited CMS features, slow UI.

What is Customer IO's overall user rating?

Customer IO has an overall rating of 4.6/5 based on 24 user reviews.

What type of tool is Customer IO?

Customer IO belongs to the following categories: Email marketing, Marketing automation platforms, Customer loyalty platforms.