Customer.io vs Klaviyo
Both sit in email marketing. Here is how they differ on the things you can actually check.
On price: Klaviyo starts $80 a month cheaper than Customer.io ($20 against $100, 80% less). Where a price could not be read from the vendor's page it is marked indicative below.
Customer.io
customer.io
Triggers messages from product events rather than lists — email, push, in-app and SMS driven by what a user actually did. Data-warehouse-friendly.
Klaviyo
klaviyo.com
Marketing automation that plugs directly into store data — browse and purchase behaviour drive segments, flows and predictive audiences. Heavily used on Shopify.
| Customer.io | Klaviyo | |
|---|---|---|
| Entry price | $100/mo | $20/mo |
| Entry plan | Essentials | — |
| Paid annually | — | — |
| Price checked | 21 Sept 2026 | not verified |
| Pricing model | Free trial | Free plan |
| Free plan | No | Yes |
| Category | Email Marketing | Email Marketing |
| Around since | 2012 | 2012 |
1 of these 2 prices were read from the vendor's own pricing page, most recently on 21 Sept 2026; the rest are indicative. Entry tier only — vendors change pricing without notice.
Customer.io vs Klaviyo, answered
- Is Customer.io cheaper than Klaviyo?
- No — Klaviyo is the cheaper entry point, at $20 a month against Customer.io's $100, 80% less.
- Do Customer.io or Klaviyo have a free plan?
- Klaviyo publishes an ongoing free plan; Customer.io does not.
- What is the difference between Customer.io and Klaviyo?
- Customer.io: Triggers messages from product events rather than lists — email, push, in-app and SMS driven by what a user actually did. Data-warehouse-friendly. Klaviyo: Marketing automation that plugs directly into store data — browse and purchase behaviour drive segments, flows and predictive audiences. Heavily used on Shopify.
