What a successful SaaS uses to run its business in 2025

Every piece of for-profit software that Buttondown relies on

Note that some links may be affiliate links, and kudos to Cushion for the inspiration behind this page. (All costs are monthly; I list one-time purchases as having an ongoing cost of "$0".)

(Interested in the open source software we use and maintain? Check out the open-source software page.)

Buttondown is the last email platform you’ll switch to.