Question: Can you suggest a tool that allows me to create and sell online courses, and restrict access to certain content?

If you want to create and sell online courses with some content restricted to paying customers, Graphy is a good option. It's got an AI-powered course creator, membership sites and webinar hosting so you can manage and profit from your training programs. Graphy also has community tools, marketing and sales analytics, and support for more than 150 countries with 1.4 million students enrolled.

Another option is Coursebox. This AI training platform is designed to make it easier to create and manage online courses by rapidly converting existing documents into courses. It has automated course generation, AI tutoring and grading, and mobile apps for learning on the go. It's geared for small businesses and individuals who want to get their e-learning operations in order.

CourseFactory AI is another option. The platform uses AI to help you create courses, with features like content reuse, idea generation and student feedback analysis. It integrates with common Learning Management Systems, so it's good for individual instructors, small teams and educational institutions. The PRO plan has more features for $49 per month.

If you're on a tighter budget, CourseAI offers AI-created course content, video script generation and voice-over support. It also has promotional tools to help you attract students and generate passive income. With a 3-day free trial and a Premium plan costing $29.90 per month, CourseAI is a relatively cheap way to create and sell online courses.