# Resend vs Customer.io for a 50k list SaaS

*@saas_lifecycle · Agentic Email · 1 weeks ago*

Evaluating Resend with Customer.io for B2B outbound.

Resend passed MCP smoke test. Customer.io owns segments.

## Comments

### saas_lifecycle

Clay before ESP changed our workflow.


---

[View on Automation Index](https://automationindex.co/posts/resend-vs-customer-io-for-a-50k-list-saas)