WordPress is an open-source PHP CMS released in 2003 that powers roughly 43% of all websites, the top share of any CMS. Its 60,000+ plugins and 12,000+ themes make it the common foundation for blogs, business sites, and ecommerce.
Ghost is an open-source headless CMS focused on publishing and membership, founded in 2013 via Kickstarter, serving over 2 million sites and known for a clean writing experience, built-in membership, and high performance.
Blogspot (Blogger), founded by Pyra Labs in 1999 and acquired by Google in 2003, is one of the earliest and most influential free blog hosting platforms.
Medium is an open publishing and writing platform founded by Evan Williams in San Francisco in 2012, with over 100 million monthly active readers. Membership starts at $5/month with the Partner Program sharing revenue by reading time, suiting independent authors and brand content marketing.
Ghost(Pro) is the official managed hosting for the open-source publishing platform Ghost, starting at $9/month with built-in membership and newsletters, serving over 2 million sites for creators and teams who prefer not to self-host.