Customer.io
Klaviyo
| Feature | Customer.io | Klaviyo |
|---|---|---|
| Pricing | From $100/mo | Free / from $20/mo |
| Free Plan | ✗ No | ✓ Yes |
| Rating | 4.4 / 5 | 4.5 / 5 |
| Best For | saas-companies, product-marketers, growth-teams, data-driven-teams | ecommerce, shopify-stores, dtc-brands, online-retailers |
| Founded | 2012 | 2012 |
| Event Triggers | ✓ | ✗ |
| Segmentation | ✓ | ✓ |
| Multi Channel | ✓ | ✗ |
| A B Testing | ✓ | ✗ |
| Data Pipelines | ✓ | ✗ |
| Reporting | ✓ | ✗ |
| Email Campaigns | ✗ | ✓ |
| Sms Marketing | ✗ | ✓ |
| Flows | ✗ | ✓ |
| Analytics | ✗ | ✓ |
| Ai Content | ✗ | ✓ |
✓ Customer.io Pros
- Powerful event-driven automation
- Good segmentation
- Multi-channel messaging
- Developer-friendly
✗ Customer.io Cons
- Expensive for small lists
- Steep learning curve
- Email editor less visual
✓ Klaviyo Pros
- Deep e-commerce integration
- Powerful segmentation
- Revenue attribution
- Great flows
✗ Klaviyo Cons
- Gets expensive with list size
- Complex for beginners
- SMS extra cost
The Verdict
Customer.io is built for saas companies and product marketers, with a focus on event-triggers and segmentation. Klaviyo targets ecommerce and shopify stores and leads with email-campaigns and sms-marketing.
On pricing, Klaviyo is the clear winner for budget-conscious users — starting at $20/mo compared to $100/mo for Customer.io. That $80/mo difference adds up quickly for growing teams.
Klaviyo has a free plan, which gives it a meaningful edge for individuals and small teams exploring their options. Customer.io requires a paid subscription from day one.
This is a genuinely close comparison. If you can, sign up for both free trials (where available) and run a one-week test with your actual team tasks before deciding.