Hecto - A platform to buy, sell and manage newsletter advertisements
Revue - The easiest way to create and send a curated newsletter
SponsorGap - Finding the right sponsor just got easier
Letterfuel - Grow your audience with a curated newsletter
PEAR - Connecting newsletters and advertisers 🍐
MailChimp UX Newsletter - Tales of researching, designing, and building from Mailchimp