Ghost is an open-source membership platform launched in 2013 with a built-in newsletter email system, free/paid subscriptions, and content paywalls, offering self-hosted and Ghost Pro hosting—an all-in-one way for creators to monetize subscriptions.
Founded in 2014 and headquartered in New York, USA, Podia is a digital products and online course sales platform for creators, used by 45000+ creators with 0% transaction fees on higher plans.
Founded in 2011 in San Francisco, Gumroad is a lightweight e-commerce platform for digital creators and indie developers, offering a 5% + $0.30 seller fee for selling ebooks, courses, software, and memberships.