Customer.io vs Klaviyo AI: Which Should You Choose in 2026?
Both prices below were read from each vendor's own pricing page on the date shown.
Pricing side by side
| Plan | Customer.io | Klaviyo AI |
|---|---|---|
| tier 1 | $100/mo — From $100/mo for 5,000 profiles (people and objects) | Free — Up to 250 profiles, 500 emails a month, $5 of mobile messages |
| tier 2 | $1000/mo — From $1,000/mo billed yearly — custom profile volume | — |
| tier 3 | On request — Dedicated infrastructure and support | — |
read from both vendors' pricing pages · 20 Aug 2026 · how we verify
Choose Customer.io if
- Product teams triggering messages off events rather than segments
- Funded startups under $10M raised — the first year is free
Choose Klaviyo AI if
- Ecommerce brands already on Shopify
- Teams that want email and SMS in one place
Where each one disappoints
Customer.io
- Products with many objects per user — profiles count objects too, not just people
Klaviyo AI
- B2B lifecycle — the product is built around ecommerce events
Compiled by Stepan Noianov from both vendors' own sites. Something wrong? Report an inaccuracy.