Customer.io vs Ghost

Customer.io

Marketing

Send automated messages based on user behavior.

Customer.io is a behavior-based messaging platform — bootstrapped to significant scale before raising; founder-led roots.

Founded

2012

Team

51-200

Listing

Free (nofollow)

Listed

May 2026

Ghost

Marketing

The professional publishing platform.

Ghost is a powerful open-source publishing platform for newsletters, blogs, and member sites — used by indie creators and large media brands.

Founder

John O'Nolan

Founded

2013

Team

11-50

Listing

Free (nofollow)

Listed

May 2026