Customer.io vs Klaviyo
A side-by-side comparison for e-commerce sellers — platforms, pricing, free trials and ROI.
| Category | Email & SMS | Email & SMS |
|---|---|---|
| Platforms | DTC Shopify WooCommerce | Shopify WooCommerce DTC |
| Pricing | 14-day free trial | Free up to 250 contacts; paid from $20/mo |
| Free trial | Yes | Yes |
| Affiliate program | — | Direct |
| ROI | Trigger personalized lifecycle messages from real customer behavior to drive more impact from every send. | Automated flows like abandoned cart and welcome series typically drive 30-40% of total email revenue on autopilot. |
Which should you choose?
Customer.io
Product and growth teams that want granular, first-party-data-driven behavioral messaging across channels.
Klaviyo
DTC and Shopify/WooCommerce brands that treat email and SMS as a primary, data-driven retention channel.
Customer.io
Pros
- 14-day free trial with no credit card required
- Powerful behavioral and data-driven triggering
- Trusted by 9,000+ brands
Cons
- Headline plan pricing not shown on the homepage
- Data-centric setup can require technical effort
- More builder-oriented than templated tools
Klaviyo
Pros
- Most powerful ecommerce data and segmentation engine on the market
- Excellent revenue attribution shows exactly what each email earns
- Vast library of integrations and benchmark data for ecommerce
Cons
- Per-contact pricing gets expensive fast as your list grows
- Feature depth creates a learning curve for beginners
- SMS is billed separately and adds meaningfully to the bill
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