Ghost
Used by 2 peopleghost.org ↗

“My newsletter is currently on Ghost, because it's got a lot of bells and whistles, and because it's a non-profit, which makes me think it'll be more stable in the long run.”
Jude Ellison S. Doyle Interview, Writer · via Uses This 
“The Listener newsletter runs on Ghost, so I use that CMS every day, and my personal newsletter is on that platform too.”
Caroline Crampton Interview, Writer, podcaster · via Uses This