Compare: Campaign Monitor vs Customer.io

A side-by-side analysis to help you find the right tool.

Campaign Monitor

Paid(Under $50/mo)

Free trial available; free tier for up to 5 subscribers

Paid($50–$200/mo)

Yes (free trial available)

Budget Tier

Campaign MonitorUnder $50/mo

Customer.io$50–$200/mo

Free Trial

Campaign MonitorFree trial available; free tier for up to 5 subscribers

Customer.ioYes (free trial available)

Business Type Fit

Campaign MonitorB2B, B2C, Agency

Customer.ioB2B, B2C

Target Channels

Campaign MonitorEmail Lists

Customer.ioEmail Lists, Website Visitors, Existing Customers

Best For

Campaign MonitorDesign-conscious brands wanting strong template/branding control

Customer.ioSaaS and product-led growth (PLG) companies needing event-driven behavioral messaging

Pros

Campaign Monitor

Customer.io

Unmatched ability to trigger messages based on exactly what users do *inside* a software product
developer-friendly
excellent visual builder

Cons

Campaign Monitor

Customer.io