Which platform is the best for live courses?

I think the better platforms for the live class are Gaotu, Cloud Class, homework help Live Class and Road Class. High road, offering a variety of course types and strong interaction; Cloud classroom, quickly create and offer courses, which can be invited by WeChat; Homework help live class, supported by a large database, provides an easy preparation environment; Provide on-the-road classes of subject courses from primary school to high school, and adopt the online live broadcast dual-teacher mode.