Customer.io Reviews & Product Details - Page 5

Customer.io has become the backbone of our lifecycle marketing. Its real-time segmentation and event-driven automation make it easy to build highly personalised journeys that adapt to user behaviour. We’ve used it to run structured onboarding campaigns, abandoned cart flows, and reactivation series — all of which can be tailored at scale without heavy developer lift.

I particularly value how Customer.io integrates seamlessly with our wider stack. Combined with RudderStack and BigQuery, it enables a closed-loop system: capturing user attributes, segmenting audiences, sending personalised emails/push, and feeding engagement data back into our warehouse for analysis. We’ve even extended it to drive ad personalisation with AdButler banners via webhooks, which shows the platform’s flexibility beyond core messaging.

The workflow builder is intuitive but still powerful — you can run no-code campaigns or drop into API/webhook mode when you need more control. From onboarding emails to gamification-based engagement rewards, Customer.io has allowed us to run sophisticated, conversion-focused campaigns that respond directly to user behaviour.

Finally, Customer.io has been strong for data-driven marketing. With detailed activity logs, behavioural triggers, and custom events, we’ve been able to build a comprehensive customer lifecycle journey map, keeping messaging consistent across acquisition, activation, retention, and win-back. Review collected by and hosted on G2.com.

The main challenge is that some advanced integrations (e.g., syncing with third-party ad servers or building custom event pipelines) can require developer involvement and ongoing maintenance. While Customer.io offers strong webhook support, there’s no native integration with certain platforms, so you sometimes have to engineer workarounds. Review collected by and hosted on G2.com.

I find Customer.io valuable for setting up onboarding and marketing automation emails. These create a lot of value in user activation, monetization, and retention. I appreciate the flexibility that the feature set enables. The features I find most useful include the campaign builder, broadcasts, and transactional emails. I would choose it again for the effective feature set, and I have no intention of switching. Review collected by and hosted on G2.com.

Setting up Customer.io easy if you have experience with workflow tools. Customer.io's UX could be better and more user-friendly. There are signs that they're moving in a user-friendly direction, with capabilities like setting up segments based on natural language prompts. Review collected by and hosted on G2.com.

I've been using CustomerIO for 1.5 year now, and it has been a great experience. I really enjoyed using some of the recently introduced features: the new email editor and the design studio. While I was happy using the traditional editor, this new version is more versatile and lets me design even better and visually appealing marketing emails and newsletters. Awesome work, team :) Review collected by and hosted on G2.com.

Don't have any specific suggestions as of now. Everything has been great so far. Review collected by and hosted on G2.com.

The flexibility in campaign setup and the Liquid templating engine continue to be very helpful for creating personalized user journeys. I also appreciate the improvements in UI, which make navigation smoother. Review collected by and hosted on G2.com.

I still find the analytics and reporting capabilities limited compared to other platforms. It would be very useful to have deeper cohort analysis, funnel tracking, and more customizable dashboards directly within the tool, without relying on external exports. Review collected by and hosted on G2.com.

Customer.io is a fantastic automation tool that allows us to centralize our marketing on one platform . Some coding experience is needed to make full-use of Customer.io, but the upside of this is the ability to integrate with almost any other tool. We have Customer.io connected to Snowflake to run smart, data-driven campaigns and send messages in our app and through the tools we already use. Review collected by and hosted on G2.com.

The Customer.io UI sometimes slows down when you have many active campaigns. Some features like the message drafts, broadcasts, and events are somewhat unintuitive to use. Review collected by and hosted on G2.com.

I'm using Customer.io almost daily, and it's one of my favorite tools to work with.

We can play around with HTML emails, and even in the general format of emails, we can add a lot of visual elements, and make them for desktop or mobile only.

Also, creating data-driven segments (if we integrate it with our CRM - which is pretty easy to do) is easy and intuitive. Review collected by and hosted on G2.com.

I'd love to be able to do A/B tests in broadcasts. Right now, you can only do it in campaigns. Review collected by and hosted on G2.com.

The customer support team at customer.io is incredible. They are prompt, kind, efficient, and literally go out of their way to figure out the answer to your questions. One person even recorded a Loom for me, and did tests on Zapier to help diagnose the problems! Review collected by and hosted on G2.com.

The only support channel is email. They should at least open live chat, or better, allowing for limited use of Zoom or calls would be delightful. Review collected by and hosted on G2.com.

Customer.io makes it easy to onboard and re-engage customers. They have a startup program which is huge for small or bootstrapped teams. It integrates with database management software easily, and can reach users across multiple channels. A/B tests are fun. Easy to track opens and understand if campaigns are working. Just rolled out a design studio that has made it easy to create great looking emails. Review collected by and hosted on G2.com.

At the end of the day, Customer.io is for email tracking/automation. Great at what it does, but not a huge horizontal. Review collected by and hosted on G2.com.

What I like best about Customer.io is the flexibility and control it gives me over transactional emails. I can trigger messages instantly via API, personalize content with user data, and track deliverability in real time. The platform helps me keep everything consistent and scalable as my SaaS grows. Review collected by and hosted on G2.com.

The initial setup can feel technical.

Its cost seems high (until our business becomes more profitable I believe) Review collected by and hosted on G2.com.

It has all the features that we need to send our emails, newsletters, transactional emails, and email sequences. In fact, it's the most feature-rich product in its category. Plus, they have done a great job at documenting everything. Review collected by and hosted on G2.com.

It does not allow sending email campaigns to people who are not our users. Review collected by and hosted on G2.com.