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

"The API integration is easy and it allows a certain degree of liberty in use cases"

What do you like best about Customer.io? The ease of use of the API and the thorough documentation makes the life of developers easy, on the other hand, the WYSIWYG editor allows our marketing team to write their campaigns without having to prompt the engineering team to do something and they're completely independent What do you dislike about Customer.io? The absence of I18N campaigns is a big issue at the moment, and it brings to an unpleasant duplication of messages and conditions, which ...

"Technical, powerful CRM platform for marketers"

What do you like best about Customer.io? I love how technical customer.io allows me and my team to be — from creating complex customer journeys spanning multiple marketing channels, to syncing with third-party services like Snowlfake, Slack and Facebook, to standing up triggered, data-driven campaigns. There isn't a lot my team and I haven't been able to accomplish with customer.io — if you can dream it up, you can probably accomplish it within the platform. I love that customer.io is a ...

"Innovative platform with great customer service"

What do you like best about Customer.io? The intuitive UX, the frequent rollout of new features, and the high level of customer service. What do you dislike about Customer.io? The reporting features could be a little better. What problems is Customer.io solving and how is that benefiting you? We are solving conversion and retention issues with our database. The rollout of new features gives us the flexibility to perform many of the tasks we require without tech requirements.

"Great Segmentation Engine but limited messaging capabilities"

What do you like best about Customer.io? User Journeys are very well defined and customizable. Segmentation engine works perfectly and doesn't miss out of user actions. What do you dislike about Customer.io? Limited capabilities in terms of Data tracking and messaging templates. What problems is Customer.io solving and how is that benefiting you? We use c.io as a customer communication and retention tool. Been able to drive incremental value from existing and new customers.

"Ugo’s Review"

What do you like best about Customer.io? It's easy to use interface. The customer support team is also great. What do you dislike about Customer.io? No in-app banners. It's something we've asked for a while and haven't still gotten. Recommendations to others considering Customer.io: It's a really advanced tool and it comes at a great price. The customer support is also top notch. What problems is Customer.io solving and how is that benefiting you? Keeping in touch with our customers.

"Excellent service with boundless features and prompt support"

What do you like best about Customer.io? Customer.io makes creating emails, whether they are broadcasts or complex campaigns, incredibly easy. It is extremely feature rich and there is nothing I want to do that I can't. As long as you have good backend data, the segmentation feature is powerful and makes complex workflows a breeeze. What do you dislike about Customer.io? This is an extremely minor complaint, but when I am generating content using HTML, I would love a pop-out that enlarges ...

"Customer.io is the best product marketing platform for B2C apps and websites"

What do you like best about Customer.io? I love that custom.io allows product teams to create complex campaigns without the help of developers. The tool is both easy to use and extremely powerful.amazing What do you dislike about Customer.io? I don't love that the platform is tied to (a very old version of) Liquid templating language. I get that this is a dev dependency for them, but it would be great to have access to a wider range of JS templating languages (like JSX) or broader access to ...

"Best email tool I've used so far."

What do you like best about Customer.io? I really like the ease of use in setting up drip campaigns and the ability to sync with other tools with webhooks. The analytics are also decent along with their database segments and attributes. What do you dislike about Customer.io? I dislike the pricing a bit as it tends to be on the pricier side. There are also some limitations with regard to integrations with some tools and services like Linkedin Recommendations to others considering ...

"Perfect emailing tool for data-focused and technical marketers"

What do you like best about Customer.io? - Data integration capacities - Easy to create campaigns and perform A/B tests: time save compared to Sendgrid - Good customer support What do you dislike about Customer.io? For fast-growing companies, it's a bit of a hassle to keep watching the user count grow. What problems is Customer.io solving and how is that benefiting you? We use customer.io to send email nurturing campaigns: - Post events - Post product sign-up (onboarding flow) As well as ...

"Easy to use and great customer service"

What do you like best about Customer.io? Ease of use and knowing the team is there to solve any problems. What do you dislike about Customer.io? Wish there were a few more features I.e tracking revenue from emails What problems is Customer.io solving and how is that benefiting you? We are using it to email our database and it's a great CRM