What Email Platform Do You Use?

The website company recommended that I start with MailerLite. So I did. After I signed up and have subscribers…they informed me that they can’t link my RSS blog feed to an email list because now MailerLite requires you to have a paid service. They are willing to switch me to KIT for free. What would you recommend. I am not very technical and the thought is overwhelmingly to switch but it might be best in the long run. I do have WordPress and my website company just informed me that they have Jetpack which can also send newsletters but they are not familiar with it. Below each blog there is a way for people to sign up to receive an email for my blog but it’s not working…and my website company said they don’t know how to use it since it’s new….but they would be willing to switch me to KIT. What are your thoughts? What newsletter program do you have and like?