What are some alternatives?
When comparing PostDiva and Buttondown, you can also consider the following products
Lasso Content Curation - Become an information ninja. Stop losing the info you need.
Substack - Substack makes it simple for a writer to start an email newsletter that makes money from subscriptions.
elink - Create Beautiful Curated Newsletters & Web Pages in Minutes.
Revue - The easiest way to create and send a curated newsletter
DrumUp - Content Marketing & Social Media Management Software
TinyLetter - Start writing your own newsletter instantly.