WordPress.com is a hosted platform where you can create a website without the need for separate hosting. It offers limited customization options, and you have to pay for certain features and use a subdomain (e.g., yourwebsite.wordpress.com) unless you upgrade to a paid plan.
WordPress.org, on the other hand, is the self-hosted version of WordPress. It gives you full control over your website, allows complete customization, and offers access to thousands of themes and plugins. You need to purchase a domain and web hosting to use WordPress.org, but it provides more flexibility and scalability for your website.