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

"Supercharged our lifecycle marketing program"

What do you like best about Customer.io? Here are my 3 favorite things about C.io: World-Class User Segmentation: C.io simplifies user cohort creation and segmentation based on attributes/events Transparent Email Metrics: C.io provides transparency into email metrics, including deliverability, open rates, click-through rates, and bounce classification (i.e. soft vs. hard). We've found this super valuable when it comes to diagnosing delivery/engagement issues. Automation: C.io has an ...

"Smooth integration and great capabilities"

What do you like best about Customer.io? Very intuitive, Customization capabilities. What do you dislike about Customer.io? Documentation sometimes is not very clear. What problems is Customer.io solving and how is that benefiting you? Automate follow-ups with our customers because we had a low conversion rate.

"I've created multiple email flows on the platform and have really enjoyed the ease of use so far."

What do you like best about Customer.io? The ability to build an intricate email flow with many different rules. What do you dislike about Customer.io? The video and visual formatting can be made easier within email flows. What problems is Customer.io solving and how is that benefiting you? It segments ceratin members of our community and helps us personalize email flows to each different group.

"Review"

What do you like best about Customer.io? I like how intuituve the platform is, and it's very helpful because I need to take care of CRM with very minimal marketing and engineering knowledge. The guideline documentations are very clear and easy to navigate. Pricing seems reasonable so far. What do you dislike about Customer.io? I have yet to run into any major inconveniences, but there was slight confusion with setting the campaign message via "campaigns" and "content". I'd naturally start a ...

"Good CRM, but needs polish."

What do you like best about Customer.io? I like that I can use it as both a data tool as well as an email CRM. We've been able to create segments of consumers based on our actions/events/messages that we would not have been able to otherwise. What do you dislike about Customer.io? I feel like the "Metric" section in the workflow is slow sometimes. Also, I really wish I could segment a segment instead of having to try another way to find people who overlap two segments. But mostly, I hate ...

"Best in class"

What do you like best about Customer.io? Their support is fast and always solve our issues. We don't need coders to work with APIs, webhooks and Whatsapp What do you dislike about Customer.io? I don't have nothing to complain about CIO What problems is Customer.io solving and how is that benefiting you? We can scale our full business without the need to rely on different platforms

"customer.io is a rules engine"

What do you like best about Customer.io? Powerful, flexible workflow GUI integrated with a marketing platform. It is great no matter if you're a one-person marketing team or a 15 person marketing team. What do you dislike about Customer.io? Wish the Broadcast support was a little more robust (integrated landing pages, for example). What problems is Customer.io solving and how is that benefiting you? Helps us deliver and rapidly iterate on our activation content. All Prefect users get an ...

"Easiest way to make custom emails"

What do you like best about Customer.io? What I really like is the easy it is to design email and to send them via API. This make our developing time shorter and our designer can directly edit our templates. Also the history of emails sent is pretty cool, this have help us a lot in customer support terms, to know if a client received their emails, if they opened it, etc What do you dislike about Customer.io? I understand is for security reasons but having to double authenticate every time I ...

"The gift that keeps on giving!"

What do you like best about Customer.io? Customer.io seems to always bee one step ahead of me. Whenever I have an idea and am curious if Customer.io is able to support me in completing it, it seems like it always can. What do you dislike about Customer.io? Not much. Sometimes it can be a bit technical, but that is likely my fault more than the platform. What problems is Customer.io solving and how is that benefiting you? Automation of campagins and broadcasts inside and outside of our platform.

"Smooth integration and great capabilities"

What do you like best about Customer.io? Very intuitive, Customization capabilities. What do you dislike about Customer.io? Documentation sometimes is not very clear. What problems is Customer.io solving and how is that benefiting you? Automate follow-ups with our customers because we had a low conversion rate.