Customer.io Reviews in June 2025: User Ratings, Pros & Cons

"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 ...

"Best in class marketing automation solution"

What do you like best about Customer.io? Easy to use with great amount of flexibility & capabilities What do you dislike about Customer.io? Might be challenging to setup without proper planning What problems is Customer.io solving and how is that benefiting you? Great way to send automated campaigns and regular campaigns across email and mobile

"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.

"Best in class marketing automation solution"

What do you like best about Customer.io? Easy to use with great amount of flexibility & capabilities What do you dislike about Customer.io? Might be challenging to setup without proper planning What problems is Customer.io solving and how is that benefiting you? Great way to send automated campaigns and regular campaigns across email and mobile

"Fantastic for setting up trigger-based email nurture campaigns"

What do you like best about Customer.io? The workflow and audience set up is easy. You can create a lot of different paths and take into consideration key activities within your connected product. It's a fun puzzle building campaigns! When things do get tricky their support team is very accessible. What do you dislike about Customer.io? The math sometimes doesn't math when it comes to the data — or it isn't very clear at a glance. We had to dig in a layer deeper or connect the dots for ...

"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

"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 ...

"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 ...

"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.

"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 ...