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

"Feature full campaigns, super fast UI, decent pricing"

What do you like best about Customer.io? The ability to send emails in the timezone of the user is super important when you have customers globally like us. The UI is modern, fast, and intuitive (compared to other tools), I find it similar to Intercom in terms of user experience, but with more affordable pricing. The API works really well. What do you dislike about Customer.io? If you have a freemium SaaS like us, pricing could be a little worrying after 50k users, what we decided to do is ...

"Customer.io integrates with big tools for tomorrows emails"

What do you like best about Customer.io? My favorite part about customer.io is that this tool integrates with other tools our company uses like Segment.com and Twilio. What do you dislike about Customer.io? Customer.io is not as easy to use as Constant Contact, but the features and integrations are more advanced. Recommendations to others considering Customer.io: If you are considering more advanced email marketing and understand the benefits of insights into your user experience, ...

"Customer.io integrates with big tools for tomorrows emails"

What do you like best about Customer.io? My favorite part about customer.io is that this tool integrates with other tools our company uses like Segment.com and Twilio. What do you dislike about Customer.io? Customer.io is not as easy to use as Constant Contact, but the features and integrations are more advanced. Recommendations to others considering Customer.io: If you are considering more advanced email marketing and understand the benefits of insights into your user experience, ...

"Best email automation"

What do you like best about Customer.io? Customer io really takes email automation to the next level. The ways you can segment, add time delays, and additional conditions to email campaigns are outstanding. Easy A/B tests as well. What do you dislike about Customer.io? If I resize all the text in an email from 12 pt font to 14 pt font, the spaces between the lines of text stay at 12 pt font for some reason. Recommendations to others considering Customer.io: Try it out- they have a free ...

"The control and QA ability plus the simplicity of use are great. Lacks complex campaign logic"

What do you like best about Customer.io? Simplicity of use. Ability to preview and release emails instead of just test emails. Ease of adding custom designs. Reliability and transparency. What do you dislike about Customer.io? Lack of complex campaign logic and SMS hold it back. What problems is Customer.io solving and how is that benefiting you? Easy to stand up marketing, drip, and transactional emails.

"Advance Marketing Email Automation with Customer.io"

What do you like best about Customer.io? Customer.io is a solid tool for marketing automation. It can easily take the marketing game of a company to the next level. We in our company use Customer.io to manage all our communication with the customer primarily with email and push notifications. Managing users, events and attributes is very easy with customer.io, it is very easy to add attribute or remove them based on their event. Creating workflows for campaigns is very easy. Creating ...

"Fantastic for the advanced user!"

What do you like best about Customer.io? Lightweight, fast, highly customizable, with all sorts of logic ready to go. This is absolutely a ESP for advanced users, requiring developer time and a coherent plan before starting out. If you're new to email or workflow automation, or don't have devs on staff, or don't like making HTML emails, this isn't the right choice. However, if you're a tech company, this blows the alternatives out of the water. The campaign builder allows for a ton of ...

"Fantastic for the advanced user!"

What do you like best about Customer.io? Lightweight, fast, highly customizable, with all sorts of logic ready to go. This is absolutely a ESP for advanced users, requiring developer time and a coherent plan before starting out. If you're new to email or workflow automation, or don't have devs on staff, or don't like making HTML emails, this isn't the right choice. However, if you're a tech company, this blows the alternatives out of the water. The campaign builder allows for a ton of ...

"It is very easy and practical to use and configure my email marketing campaigns in a simple way"

What do you like best about Customer.io? Bankog Customer.io Pros: It is a fairly easy and practical tool to use that allows me to configure my email marketing campaigns in a simple, fast, orderly and efficient way, which guarantees a much more efficient operation of the strategy outlined when wanting to evaluate the results obtained, the support service is highly responsive and quite fast when it comes to solving any problem or concern that may arise, not to mention that this is practically ...

"Keep your database updated at all times"

What do you like best about Customer.io? It is an excellent tool for marketing and managing services and campaigns, it can store an immense database of potential clients and manage all the fields that are needed to keep everything in order within the work area up to date. What do you dislike about Customer.io? It is a little slow on some occasions and honestly it could be much better, the truth is that it is a complete system, but it has that problem of being a bit heavy. Recommendations to ...