Customer.io is described as 'Automate email, SMS, push, and webhooks using behavioral data, advanced segmentation, analytics, and A/B testing for tailored customer communications' and is a Email Marketing service in the business & commerce category. There are more than 50 alternatives to Customer.io for a variety of platforms, including Web-based, SaaS, Android, iPhone and Self-Hosted apps. The best Customer.io alternative is FreeScout, which is both free and Open Source. Other great apps like Customer.io are Listmonk, Text App, OpenChat and Chatwoot.