MailerLite is free to start but has advanced features like ConvertKit. I switched from MailChimp to MailerLite. Here are 7 reasons I'm not switching again.

MailerLite vs. MailChimp vs. ConvertKit

MailerLite vs MailChimp vs ConvertKit, and 7 reasons why I'm NOT switching again!

How to create a Gmail email signature

Create a Branded Gmail Signature