My All-time Favorite Email Marketing Software.
January 06, 2026

My All-time Favorite Email Marketing Software.

Ajay Jagtap | TrustRadius Reviewer
Score 10 out of 10
Vetted Review
Verified User

Overall Satisfaction with Customer.io

We use it for all things email marketing. If I’ve to list, these are the things I use CustomerIO for: - email marketing sequences - weekly newsletters - transactional emails - lead nurturing campaigns - audience segmentation and retargeting - tracking app activity and segmenting users - and others.

Pros

  • I really like its new feature where AI provides suggestions about the email.
  • New drag-and-drop email editor is much better compared to its traditional.
  • I really enjoy segmenting users. It really helps us with purchase and activity tracking.
  • Recommended send time feature is also a great addition.

Cons

  • I would love to see some more font options. I wanted to have the fonts that we use on our website for the email as well, but it doesn't have that option.
  • Integrating web forms can be a pain sometimes, but its also not a major drawback.
  • No evident suggestions as such, it's been good so far otherwise.
  • Improved user retention, leads conversion, and overall user satisfaction.
  • Starting a weekly newsletter helped increase user satisfaction among our existing converted users.
  • We convert a great deal of leads through our lead nurturing campaigns.
I have tried multiple email marketing software, including MailChimp, ConvertKit, CustomerIO, and HubSpot, but I really liked how CustomerIO solved our problem. I think it’s the best email marketing tool, especially for SaaS companies or anyone with a large email list and diverse requirements.
I have tried multiple email marketing software, including MailChimp, ConvertKit, CustomerIO, and HubSpot, but I really liked how CustomerIO solved our problem. They were all somehow solving our problem, but lacked a few things here and there. For instance, ConvertKit’s forte is newsletter emails and landing pages that it creates for you. It wasn’t a desiccated email software company. HubSpot was good, but with CustomerIO’s recent AI updates, I like it much better. Plus, support is impeccable.

Do you think Customer.io delivers good value for the price?

Yes

Are you happy with Customer.io's feature set?

Yes

Did Customer.io live up to sales and marketing promises?

Yes

Did implementation of Customer.io go as expected?

Yes

Would you buy Customer.io again?

Yes

Talking from the perspective of a marketer at a SaaS with average. 50K email subscribers, Customer IO has been an excellent tool for us. Our requirements include sending users newsletters, marketing emails, and transactional emails, running lead-nurturing campaigns, and more. For a comprehensive use case like ours, CustomerIO is great. While it also has a learning curve, when you have such requirements, it’s worth it. I don’t think CustomerIO is the best fit if you have basic requirements like only weekly newsletter emails.

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