Customer.io Reviews & Product Details

The data model. Everything is built around events and attributes so segmentation actually reflects what users are doing, not just the fields you filled in. The visual campaign builder is fast after you understand it, and Liquid templating gives real control over personalization without needing a developer for every change. Review collected by and hosted on G2.com.

The built-in analytics are close to useless for real analysis. You have to pipe everything into an external platform just to answer basic questions about campaign performance.

Campaign-level exit criteria is limited to one condition. On complex journeys that gets restrictive fast.

The UI has small but constant friction points: no column sorting, no custom default views, things you'd expect from any mature SaaS tool.

The canvas is rigid. You can't move elements freely, which makes building and reading complex flows harder than it should be.

Event and attribute data has no visual layer. There's no quick way to sanity-check that data is flowing in correctly without digging into raw logs.

Testing a full journey is basically impossible. If you're building something with many branches and conditions, you need a way to walk a test user through the entire flow. That doesn't exist. Review collected by and hosted on G2.com.

I like that Customer.io makes it so easy and simple to create marketing emails across our dozens of clients. I love the integration with Twilio for SMS. But mostly, I love how responsive they are to questions, issue, concerns and feedback. The new AI integration has been great. I've spent the last few days training it on our workspaces and using it to assist with ideas for new projects and so far, I have been impressed. I cannot wait to integrate this new tool more into our email and sms workstreams. Review collected by and hosted on G2.com.

There really isn't much I dislike! I do think sometimes new features are rolled out without a ton of prior communication. And during testing or rollout of these new features, the platform can get slow or wonky. I think the huge features are communicated well. But for smaller things, it often creates issues, like when it only displayed emails up to 30 days for a week or two- a refinement that was not necessary and added more work. Review collected by and hosted on G2.com.

I like Customer.io because it helps me format my newsletters in a more accessible way and embed media like images and YouTube videos, which is great because I don't have to link out to them. It also allows me to have colored backgrounds to create my own company-themed color scheme, which has been well-received by our very visual team. Customer.io lets me use our company color palette as the background and even customize the color for my hyperlinks. I appreciate how easy it was to set up, as it took just a brief explanation from my team for me to get the newsletters up as templates. Review collected by and hosted on G2.com.

I can't import my Microsoft Outlook mailing list as a dynamic list, so I have to send the newsletters to myself and then forward from there. This means that I can't use the analytics features. Review collected by and hosted on G2.com.

I use Customer.io to send emails and in-app messages, and the Agent feature has been a massive help. It has really reduced my manual work, and I love that I can just ask it to look for something, and it takes care of it for me. The Agent acts like a personal assistant, a one-stop shop that I can describe tasks to and it handles them, plus it can pull data for me. Overall, it has made my life easier, and as I continue to train it, I'm confident it will continue to make my tasks even more manageable. The initial setup was relatively easy, and I'm using it integrated with Mobivate through webhook, with plans to integrate with Claude. I wouldn't trade Customer.io for any other product. Review collected by and hosted on G2.com.

The translation time. Whenever I translate, there are times it takes so much time. I wish it could be faster. Also, whenever I ask the agent to translate for me, it leaves weird characters or codes in replacement of emojis. I wish it just totally deletes the emoji instead of these codes. Review collected by and hosted on G2.com.

I really like the interface of Customer.io; it feels easy to use and has a clean, clear design. I love the customer support team. Everyone is always helpful with any questions, and I can submit queries right as I'm working on a campaign. They can help me with my questions. I appreciate the ability to set up blogs and time delays to create campaigns. I also like that I can send newsletters either right away or schedule them for a specific time. Overall, the interface and customer support are the main features I appreciate. Review collected by and hosted on G2.com.

Sometimes when I'm creating a campaign, there are features that seem missing, like setting an email to be sent on a specific weekday. The options for controlling delays aren't very extensive or varied. Also, if I create a campaign for one segment of clients and later want to add another segment to the same campaign, it doesn't recognize everyone already in the segment and only picks up new users. Adding additional segments to a campaign after it's already created would be helpful. There was a bit of a learning curve at the start to learn how to use it. I would have liked more educational videos on specific topics to help with setup initially. Review collected by and hosted on G2.com.

I really love Design Studio in Customer.io because it lets me completely and flexibly design my emails. As a front-end developer, I always use code, and having the code tool integrated makes it so easy to use. It's super handy and enhances my speed and productivity, especially when designing a new email update. I just have to do it once, and with the help of an AI tool, updates are quick, taking barely five minutes. Plus, I can see the design live next to the code, which is a really good user experience. I also loved the new user interface; it's even easier and better. Review collected by and hosted on G2.com.

I couldn't find how to write a very plain email without design elements in Customer.io, like sending it from my phone. I had to use a workaround with code because there's no direct button for that. Also, there's no functionality for sending a threaded email, which would really help, especially in stacking emails one under the other in an automated workflow. Review collected by and hosted on G2.com.

I use Customer.io for lifecycle marketing, particularly newsletters and in-app pushes. It gives me a fast and easy way to engage with my customers. I really like the newsletter functionality because I can easily edit it in HTML to maximize functionality and achieve the look and feel I'm looking for. The ability to use HTML is great because I can leverage AI to create dynamic newsletters. I don't have to settle for out-of-the-box templates. If I can think of something, I can make it and put it in a newsletter. Review collected by and hosted on G2.com.

Sometimes the fact that the newsletter is an HTML prohibits me from speed to market. Yeah being that everything's an HTML I have to type everything out and that sort of sucks sometimes. It will be great if I could like build my own templates that I use. Review collected by and hosted on G2.com.

I like using Customer.io because it allows me to focus on the content of emails while letting developers handle the data aspects. The design studio is a good tool that lets me quickly create emails that look nice on both mobile and desktop. I also appreciate the workflow capabilities that let me create different branches and customize when emails are sent based on data-associated conditions. The help documentation has been a good source for learning how to create emails and format liquid syntax, and the initial setup was relatively easy with the help of the documentation. Review collected by and hosted on G2.com.

Fields associated with date and time are frustrating. I don't see any reason why the UNIX timestamp format needs to be used to compare dates for logic within liquid code or within the workflow. It should allow a regular date time stamp in ISO format to do the same thing. I also would prefer to have more control over field formats when creating fields associated with customers or events. Right now, fields are very flexible, which can be powerful, but I would prefer to specify field types to enforce the data format. Review collected by and hosted on G2.com.

I like the variety of messaging that Customer.io allows. Not only does it have email campaigns, but I can also use in app messages and broadcast. It even integrates into what we call our marketing site for anonymous messages, which are for users that are not registered or signed into any account. Additionally, the initial setup was fairly simple, and Customer.io did a pretty good job of providing onboarding and the knowledge needed to get it working correctly. Review collected by and hosted on G2.com.

I would like more notification preferences. So, for example, if a customer fills out a form and submits it or some sort of action is taken within Customer.io campaign, for me to be notified via email and not have to go to the Customer.io dashboard to see these types of actions. Review collected by and hosted on G2.com.