Klaviyo vs Customer.io: Which Should You Choose in 2026?
Choosing between Klaviyo and Customer.io comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.
By Toolradar Team · Last updated March 22, 2026 · Methodology
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
Klaviyo
Email marketing for e-commerce
Best for you if:
- 0
- • You want to try before committing
- • You need email marketing features specifically
- • Klaviyo is an email and SMS marketing platform built specifically for e-commerce
- • It provides advanced segmentation, automation flows, and predictive analytics for online stores
Customer.io
Automated messaging based on user behavior
Best for you if:
- 0
- • You need workflow automation features specifically
- • Customer.io is a marketing automation platform for sending targeted emails and push notifications
- • It triggers messages based on user behavior with powerful segmentation and workflow builders
| At a Glance |  Klaviyo |  Customer.io |
|---|---|---|
Price | Free + Paid | Paid |
Best For | Email Marketing | Workflow Automation |
Rating | — | — |
| Feature | Klaviyo | Customer.io |
|---|---|---|
| Pricing Model | Freemium | Paid |
| Community Rating | No ratings yet | No ratings yet |
| Total Reviews | 0 | 0 |
| Community Upvotes | 0 | 0 |
| Categories | Email MarketingMarketing Automation | Workflow AutomationCustomer Data Platform |
How Klaviyo and Customer.io Compare
Klaviyo
Email marketing for e-commerce
Free tier available
Customer.io
Automated messaging based on user behavior
Paid
Klaviyo is a email marketing tool. Customer.io is in workflow automation.
Who Should Use What?
On a budget?
Klaviyo has a free tier. Customer.io is paid only.
Go with: Klaviyo
Want the highest-rated option?
Neither has user reviews yet.
Go with: Klaviyo
Value user reviews?
Neither has user reviews yet.
Go with: Klaviyo
3 Questions to Help You Decide
What's your budget?
Klaviyo is freemium. Customer.io is paid. Klaviyo lets you start free.
What's your use case?
Klaviyo is a email marketing tool. Customer.io is in workflow automation. Pick the category that matches your needs.
How important are ratings?
Neither has user reviews yet.
Key Takeaways
Klaviyo
- 0
- Free tier available
- Our pick for this comparison
Customer.io
- Better fit for workflow automation
The Bottom Line
Klaviyo is our pick.
Frequently Asked Questions
Is Klaviyo or Customer.io better?
Klaviyo is rated high in our evaluation. Klaviyo is freemium and Customer.io is paid.
What are Klaviyo and Customer.io used for?
Klaviyo: Email marketing for e-commerce. Customer.io: Automated messaging based on user behavior.
What does Klaviyo cost vs Customer.io?
Klaviyo is freemium (free tier + paid plans). Customer.io is a paid tool. Visit their websites for detailed pricing.