head to head
Customer.io vs Klaviyo
Behavioral lifecycle automation for SaaS versus event-rich ecommerce automation.
Side by side
| Feature | Customer.io | Klaviyo |
|---|---|---|
| Tagline | Behavior-driven lifecycle messaging. | Ecommerce-focused marketing automation. |
| Free tier | No permanent free tier; trial only | 500 emails to 250 contacts |
| Starts at | $100/mo (Essentials) | $45/mo for 5,000 emails |
| Pricing model | subscriber-based | subscriber-based |
| API | Yes | Yes |
| SMTP | No | No |
| SDKs | node, python, go, ruby, php, java | node, python, php, ruby |
| Templates | rich | rich |
| React Email | No | No |
| Webhooks | Yes | Yes |
| Inbound | No | No |
| Multi-tenant | Yes | No |
| Idempotency | No | No |
| Dedicated IP | Yes | Yes |
| Deliverability | Good; reputation managed at the workspace level with optional dedicated IPs. | Solid for ecommerce traffic. |
| DX score | 7/10 | 6/10 |
| Best for | B2B SaaS teams running complex onboarding and lifecycle programs. | Shopify and ecommerce teams. |
Customer.io
pros
- ›Best-in-class behavioral targeting
- ›Strong workflow editor
- ›Multi-channel
cons
- ›Expensive starting price
- ›Overkill for pure transactional
- ›Pricing scales with users
Klaviyo
pros
- ›Ecommerce integrations are deep
- ›Predictive analytics
cons
- ›Weak for non-ecommerce use cases
- ›Pricing climbs fast with contact growth