Any Revue replacements?

Hey everyone, My name is Herco and I am a developer on DoinFine, and app which will be launching in a couple of months. We are at a point where we want to share updates with our users using a newsletter. I used Revue in the past, however, since Revue has been shutdown by Twitter, I have struggled to find a similar tool. I am aware of tools like Mailchimp, Brevo (our current solution), etc. However, Revue had this special touch of feeling like a simple newsletter tool. I have been considering Substack as the replacement. Are there any other teams who have had this scenario and have you found any products for this?