Customer.io vs Klaviyo
Updated June 2026 · A structured head-to-head comparison.
Automated messaging based on real-time data.
The verdict
Both Customer.io and Klaviyo are credible marketing automation tools, and the right pick comes down to your priorities.
Choose Customer.io if you want a longer free trial (14 days). Automated messaging based on real-time data.
Choose Klaviyo if you'd rather have a lower starting price (free – $45/mo) and a free plan to start on. The data-driven marketing platform for ecommerce.
Customer.io vs Klaviyo: side by side
| Dimension | Customer.io | Klaviyo |
|---|---|---|
| Starting price | From $100/mo | Free – $45/moWinner |
| Free plan | No | YesWinner |
| Free trial | 14 daysWinner | — |
| Pricing model | Subscription | Freemium |
| Best for | Saas, Product Teams | Ecommerce, Dtc Brands |
| Platforms | Web, Api | Web, Api |
| Rating | 4.4/5 | 4.6/5 |
Customer.io key facts
- Vendor
- Customer.io
- Pricing
- Subscription — From $100/mo
- Free tier
- Free trial (14 days)
- Platforms
- Web, Api
- Best for
- Saas, Product Teams
- Editor rating
- 4.4 / 5
- Founded
- 2012
- Headquarters
- Portland, OR, USA
Klaviyo key facts
- Vendor
- Klaviyo
- Pricing
- Freemium — Free – $45/mo
- Free tier
- Yes
- Platforms
- Web, Api
- Best for
- Ecommerce, Dtc Brands
- Editor rating
- 4.6 / 5
- Founded
- 2012
- Headquarters
- Boston, MA, USA
Frequently asked questions
Is Customer.io better than Klaviyo?
Neither is universally better — Klaviyo edges ahead on overall rating, but the best choice depends on price, platforms, and your use case. See the side-by-side table above.
Is Customer.io or Klaviyo cheaper?
Klaviyo is the more affordable of the two to get started, at free – $45/mo. Customer.io starts at from $100/mo; Klaviyo starts at free – $45/mo.
Can Customer.io replace Klaviyo?
Yes for most teams — both are marketing automation tools with heavily overlapping features. The main trade-offs are pricing and platform support, covered in the comparison above.