Paid Memberships Pro is described as 'offers a complete membership solution for WordPress featuring unlimited levels, recurring payments, registration & profile fields, protected member content, robust member management and more'. There are more than 10 alternatives to Paid Memberships Pro for a variety of platforms, including Self-Hosted solutions, Wordpress, Online / Web-based, iPhone and iPad. The best alternative is Teachable, which is free. Other great apps like Paid Memberships Pro are User Meta (Freemium), WP-Members (Free, Open Source), WP User Frontend (Freemium, Open Source) and Ultimate Member (Freemium).
The s2Member® Framework (free) integrates with PayPal Website Payments Standard (also free). Sell "Buy Now" or Membership access to your site. Restrict access to Roles, Capabilities, Posts, Pages, or anything else in WordPress.
Tutor LMS is a robust WordPress LMS plugin. Create courses on a frontend course builder, test learners with multiple quizzes, award certificates with a rich certificate builder, and do much more. Best for instructors, marketplaces, institutions, etc.