Newsletter Operating System - All-in-one dashboard to launch & grow your newsletter
Startup Quote - Awesome founders provide wisdom about making things
LetterHunt - LetterHunt connects you to 10,000+ niche, active newsletter writers to promote your product.
Mattermark Daily - A curated newsletter of blog posts from investors & founders
Kickstart Side Hustle Newsletter - Dwarf-size newsletter with viral marketing case studies
Plato Stories - The best management stories from our mentors