Klaviyo vs Customer.io
Side-by-side from the Top 11 rankings of Klaviyo vs Omnisend vs Drip: 11 Best Email Marketing Platforms for Ecommerce 2026 and HubSpot vs ActiveCampaign vs Klaviyo: 11 Best Marketing Automation Software 2026. Last verified June 11, 2026.
The short answer
Klaviyo ranks higher on Top 11 (#1 vs #6) for Ecommerce brands running flows and campaigns / Marketing managers choosing marketing automation platforms (HubSpot vs Marketo vs ActiveCampaign vs Klaviyo). Unbeatable Shopify data integration for powerful segmentation.
At a glance
| Klaviyo | Customer.io | |
|---|---|---|
| Top 11 rank | #1 / Klaviyo vs Omnisend vs Drip: 11 Best Email Marketing Platforms for Ecommerce 2026 | #6 / HubSpot vs ActiveCampaign vs Klaviyo: 11 Best Marketing Automation Software 2026 |
| Score (out of 9.4) | 9.4 | 8.2 |
| Best for | Shopify power users | Event-driven messaging for tech |
| Pricing | $$$ ($200 to $1,500+/mo) | $$ ($100 to $1,500/mo) |
| HQ | Boston, USA | Portland, USA |
| Founded | 2012 | 2012 |
Klaviyo
Unbeatable Shopify data integration for powerful segmentation.
www.klaviyo.comSee full entry in Klaviyo vs Omnisend vs Drip: 11 Best Email Marketing Platforms for Ecommerce 2026
Customer.io
A flexible, API-first platform for tech companies to automate messaging based on user behavior.
customer.ioSee full entry in HubSpot vs ActiveCampaign vs Klaviyo: 11 Best Marketing Automation Software 2026
Methodology and scoring weights live at /methodology. No vendor pays for placement — see about.