Compare: Customer.io vs MailerCheck

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

Customer.io

Paid($50–$200/mo)

Yes (free trial available)

Paid(Under $50/mo)

Yes, free trial includes a set number of test credits.

Budget Tier

Customer.io$50–$200/mo

MailerCheckUnder $50/mo

Free Trial

Customer.ioYes (free trial available)

MailerCheckYes, free trial includes a set number of test credits.

Company Size Fit

Customer.ioSmall Team (2–20), Mid-Market (20–200)

MailerCheckSolo / Freelancer, Small Team (2–20), Mid-Market (20–200)

Business Type Fit

Customer.ioB2B, B2C

MailerCheckB2B, B2C, D2C / E-commerce, Agency

Target Channels

Customer.ioEmail Lists, Website Visitors, Existing Customers

MailerCheckEmail Marketers, Growth Hackers, Agency Owners

Best For

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

MailerCheckMarketers wanting to clean email lists and improve inbox placement.

Pros

Customer.io

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

MailerCheck

Cons

Customer.io

MailerCheck