Klaviyo vs Customer.io
Side-by-side from the Top 11 ranking of The 11 Best Marketing Automation Software (2026). Last verified June 7, 2026.
The short answer
Klaviyo ranks higher on Top 11 (#3 vs #6) for Marketing managers choosing marketing automation platforms (HubSpot vs Marketo vs ActiveCampaign vs Klaviyo). The gold standard for e-commerce, with deep data integration and powerful segmentation for online stores.
At a glance
| Klaviyo | Customer.io | |
|---|---|---|
| Top 11 rank | #3 / The 11 Best Marketing Automation Software (2026) | #6 / The 11 Best Marketing Automation Software (2026) |
| Score (out of 9.4) | 8.9 | 8.2 |
| Best for | E-commerce & DTC brands | Event-driven messaging for tech |
| Pricing | $$ ($60 to $1,955/mo) | $$ ($100 to $1,500/mo) |
| HQ | Boston, USA | Portland, USA |
| Founded | 2012 | 2012 |
Klaviyo
The gold standard for e-commerce, with deep data integration and powerful segmentation for online stores.
www.klaviyo.comSee full entry in The 11 Best Marketing Automation Software (2026)
Customer.io
A flexible, API-first platform for tech companies to automate messaging based on user behavior.
customer.ioSee full entry in The 11 Best Marketing Automation Software (2026)
Methodology and scoring weights live at /methodology. No vendor pays for placement — see about.