Customer.io Reviews in June 2026: User Ratings, Pros & Cons

"Amazing tool with sea of possibilities"

What do you like best about Customer.io? CSio works very intuitively and I have been able to create any campaign I could imagine. It is very clear how the tool works and the customer support is super helpful. The documentation is a great resource and I have gained some inspiration from their community pages. They keep adding new features very frequently and our campaigns have benefitted from it greatly! A big plus: I'm not great at coding myself, so it's really nice that I can work on my ...

"Very simple yet very robust"

What do you like best about Customer.io? Very simple way for a developer to reach out to customer and egage based on their activity What do you dislike about Customer.io? Sending texts using webhooks. Lack of multi branch if/then. Email domain verification isn't compatible with wix managed domains What problems is Customer.io solving and how is that benefiting you? Engaging our users based on events

"A very useful and insightful tool"

What do you like best about Customer.io? You can customize and target the messages you want to send to the users. You can also run an a/b test when creating a flow, and after you launch a broadcast or a campaign, the metrics are straightforward to follow and keep track of. What do you dislike about Customer.io? We cannot set a timeframe for when we want to launch or send a push notification to our users. i.e., Only users who perform a specific event between 7 am-10 am will receive a push ...

"Excellent email service provider that just works"

What do you like best about Customer.io? Customer.io deliveres high deliverability through an easy-to-use interface. It has fairly advanced features and is not plagued by cluncky UI-bugs as many of its competitors. What do you dislike about Customer.io? There is not much to dislike about Customer.io. What problems is Customer.io solving and how is that benefiting you? Customer.io makes it easy for us to reach customers in a reliable way. It's easy enough for anyone to use, yet offers ...

"Great product and a great company"

What do you like best about Customer.io? - ease of use: complexity is up to you, and the product will allow you to get creative! - supports wide variety of use-cases What do you dislike about Customer.io? - no custom reusable webhooks - can't setup devices without official SDK What problems is Customer.io solving and how is that benefiting you? A product that supports campaign management flows, easy personalization, and customer lifecycle management is necessary for B2C SaaS companies!

"Experienced Customer.io User"

What do you like best about Customer.io? This is your all-in-one system to communicate with your customers. Instead of having multiple systems to push, email, text or otherwise communicate, Customer.io makes it easy to set every system up and get your messaging out. Analytics are also terrific. What do you dislike about Customer.io? I do not have any issues as a Customer.io user. However, we did need the developer to help set up the initial stages of our account. After that, with the ...

"Feature-rich platform to create powerful customer experiences"

What do you like best about Customer.io? Support is top-notch; The ability to ingest custom data attributes and events from our data warehouse allows us to respond to customer journeys quickly. What do you dislike about Customer.io? Significant learning curve; it pays off to invest time to get acquainted with the terminology involved in campaign building. What problems is Customer.io solving and how is that benefiting you? Reaching out to customers in a timely manner as they move through ...

"Very intuitive"

What do you like best about Customer.io? The visualizations when making a campaign workflow is tremendously helpful to assure customer are moving through it as you intend. Liquid tags are easy to understand and intuition implement. What do you dislike about Customer.io? It would be awesome to be able to upload and update multiple messages at once. Currently I must click on and out of each message in a workflow. Uploading them all at once and then arranging them as desired would be ...

"Great email marketing platform for data-driven communications"

What do you like best about Customer.io? Customer.io makes it easy for our developers to get our customer data actions into the platform. That allows our marketing team to create complex email workflows without doing one-off uploads or asking developers to do one-off projects. The data model is simple and effective (with user attributes + triggered events + page views). It provides the necessary information to create compelling emails and well-time customer journeys. What do you dislike ...

"Great Technical Support"

What do you like best about Customer.io? When I am stuck, the technical support, provided both by the online chat functionality and also by our own personalized account manager has been fantastic. They have been on hand whenever I have needed them, in a timely manner. What do you dislike about Customer.io? The downside of the application is the lack of ability to be to send an email within a workflow at a specific date and time. An example of this would be sending an email the day before an ...