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

"An Effective Email Marketing Tool"

What do you like best about Customer.io? What I like best about Customer. io is the possibility of personalization. There are many ways to personalize this email marketing tool. Segmentation is one of them: If you integrate Customer with your CRM or/ and other platforms it gets even more interesting. Let's say you have several campaigns for different products and specific audiences established in your CRM. By integrating Customer with your CRM you can send personalized campaigns to each ...

"Marketing Operations Manager"

What do you like best about Customer.io? Easy to manipulate templates to your marketing preferences. Easy to integrate sms and emails within a single campaign. What do you dislike about Customer.io? No control f / search function - makes coding emails difficult No folders to organize campaigns What problems is Customer.io solving and how is that benefiting you? Email marketing / Sms marketing

"Great product and potential"

What do you like best about Customer.io? I love how developer friendly Customer.io is - their new webhooks feature gives a lot of power and you always get the feeling that the platform is robust and well tested. What do you dislike about Customer.io? I find that it falls a little in-between what we need - it's not quite marketing-centric enough to be our marketing automation tool, and it doesn't have the live chat option of something like Intercom. But I suspect these aspects will come with ...

"Decent tool for prospecting"

What do you like best about Customer.io? I like that it is integrated into the chrome browser although I would like the option to use with Firefox or Outlook. What do you dislike about Customer.io? No way to schedule emails for prospects at the moment. Could be beneficial to offer this to users. What problems is Customer.io solving and how is that benefiting you? Prospecting has been easier but it seems there are several tools like this that offer similar data.

"affordable trigger email campaign"

What do you like best about Customer.io? I like the affordable price and ease of use What do you dislike about Customer.io? there are a ton of bugs that aren't fixed often. once you learn them you learn to work around them Recommendations to others considering Customer.io: its the most affordable option when you are looking to build out a more robust email campaign. What problems is Customer.io solving and how is that benefiting you? trying to build an event based email campaigns to ...

"I thought it would offer more flexibility, but it's actually quite limited."

What do you like best about Customer.io? API is fairly simple to post user data, and event data. Email editor is flexible. Team is fairly responsive. What do you dislike about Customer.io? No saved views. Shared objects like Newsletters, Segments, etc between 'Multi-Environments' is problem some. Refresh in interface is a bit slow. Filtering is poor. Search (ed) fields is limited to just email address of user. No branching logic in campaigns. No Relational Data model. No Triggering on ...

"powerful but can get complex"

What do you like best about Customer.io? Great for handling bulk emailing, mass drip emailing, A/B testing, integration with other software What do you dislike about Customer.io? too many customization options can make it confusing to use at times. Not easy to make email look pretty for non-tech users who don't know HTML Recommendations to others considering Customer.io: Need someone who has basic level of HTML and data integration (e.g. Segment) to connect with your other data bases (e.g. ...

"Brilliant way to lighten the load for developers"

What do you like best about Customer.io? I love the fact that, as an engineer, I'm not constantly having to build specific product for our growth team, sales teams, customer service team, etc etc. What do you dislike about Customer.io? There's not much that I dislike. I guess if I had to come up with something, it would be the steep cost. Well worth it, but the cheapest tier is currently $100. Recommendations to others considering Customer.io: Send your data to segment and have that forward ...

"Love it!"

What do you like best about Customer.io? I love the Ruby API! https://customer.io/docs/api/ruby.html We have some custom events that are not available from the JS snippet, so being able to add our own events through the API has allowed us to set up some awesome drip campaigns through Customer.io. Special mention for their adorable mascot. What do you dislike about Customer.io? I haven't run into anything that I didn't like so far! Recommendations to others considering Customer.io: Use the ...

"Good Product"

What do you like best about Customer.io? UI is good and very fast with the ability to customize. Also the different features contact manager, List segmentation, Template selection, Template Editor, and Social media marketing to name a few What do you dislike about Customer.io? •Their API does not allow to find a customer by email; •They do not support merging of duplicate profiles in any way. •They refusing to provide a backup copy of generated events; •There is not support for batch change ...