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

"My favorite platform for Product Led Growth (PLG) and Marketing Automation"

What do you like best about Customer.io? - Attractive Pricing for B2C businesses (with a lot of users) - User friendly - Very developer-friendly and transparent in terms of data - Very flexible with many integrations, webhooks and very advanced personalization and data modifications that can be implemented using either Liquid or Javacript - Supports various channels: Email, mobile push notifications, in-app news, SMS or WhatsApp (via Twilio) and even more through webhooks - Pricing is not ...

"A powerful flexible platform with great customer support"

What do you like best about Customer.io? I most like the flexibility of the product and the ability to tackle a wide variety of use cases greater than I expected. The ease of integration means that it's easy to get prototypes up and running in very short time. What do you dislike about Customer.io? Getting on top of email creation and styling is quite time consuming and can require some specific skill sets. The more cio can provide out of the box assistance with this the better. What ...

"My favorite platform for Product Led Growth (PLG) and Marketing Automation"

What do you like best about Customer.io? - Attractive Pricing for B2C businesses (with a lot of users) - User friendly - Very developer-friendly and transparent in terms of data - Very flexible with many integrations, webhooks and very advanced personalization and data modifications that can be implemented using either Liquid or Javacript - Supports various channels: Email, mobile push notifications, in-app news, SMS or WhatsApp (via Twilio) and even more through webhooks - Pricing is not ...

"Comprehensive all-in-one communication solution"

What do you like best about Customer.io? We have been using Customer.io for over a year now, and we have been extremely happy with the ease of use, simple setup (good documentation), and comprehensive native integrations. Before switching to customer.io, we tested a range of other providers, but none of them provided all the features we were looking for; some were too simple, whereas others were too complicated for no reason. We now use customer.io every day for all of our communications ...

"Customer.io is a great tool to setup all your marketing channels"

What do you like best about Customer.io? CIO is so versatile. Setting up new channels, campaigns and broadcasts is easy and the integrations and automation are incredible. What do you dislike about Customer.io? The ramp-up time to understand how CIO works and how to use it and how to set up different campaigns, broadcasts, segments, etc is a bit higher as few use cases come out of the box. What problems is Customer.io solving and how is that benefiting you? We were able to setup our entire ...

"Great platform for segmentation"

What do you like best about Customer.io? I love customer.io for grouping my audiences together and creating automatic and manual segments. Sending broadcasts is similar to most other mailout platforms I've used, so it's easy to switch to using the platform without too much learning time. What do you dislike about Customer.io? The only things I'd add to improve Customer.io is the ability to add notes to a record so it can serve as our one -stop-shop for our CRM data, and secondly, the ...

"It's a very great tool that can help you in your relationship with your customers."

What do you like best about Customer.io? The personnalization of your campaigns, the reactivity of the support, the possibilities this tool offers you. What do you dislike about Customer.io? Kind of hard to handle all the features and understand all technical aspects, you may use it with a technical profile to be very efficient. What problems is Customer.io solving and how is that benefiting you? The fact that we used to adress our customers the same way .. Considering they are all ...

"Easy to get started and powerful tool"

What do you like best about Customer.io? Customer.io is very intuitive to use and easy to integrate with our different platforms. We use customer.io regularly to contact our users across different platforms, and it's met all of our needs. We haven't had to contact customer support often, but when we have, they have been quick to respond and helpful. What do you dislike about Customer.io? When building complex flows, it gets a little difficult to see all the steps What problems is ...

"Powerful customer communications tool"

What do you like best about Customer.io? Their customer service is incredible; they're always shipping new features and expanding the product. What do you dislike about Customer.io? They don't have survey capability, which requires us to have another tool. Also, their in-app messaging is not very flexible since it's so new. What problems is Customer.io solving and how is that benefiting you? Easy way to build workflow logic to send the proper communications to the right customer at the ...

"Easy to use, but complex enough to do what you want"

What do you like best about Customer.io? I like the integrations with webhooks and our APIs. They make sense and are reactive and self explanatory. The liquid formatting system for sending content is intuitive and flexible enough for my needs. It was easy to set up with our current database of candidates and we had great support during this time. Data is insightful and relevant. What do you dislike about Customer.io? Some of the email content formatting is not able to do what I want, but ...