Tonebase
Tonebase is a relative newcomer to the realm of online piano tuition, aimed at advanced players looking to develop their skills. It offers both guitar and piano instruction, which are taught via a series of videos and textbooks. While the videos are not as clear as a beginner may require, the later are surprisingly useful resources. In fact, we'd only recommend this platform to advanced players because there's a lot of complicated theory to learn, digest, and apply to your game.
You can view and participate in live lessons and seminars in addition to pre-recorded videos. On the platform, there's a bustling 'forum' where tutors organize guided exercises and community practice challenges. In an activity that might feel isolated, it's a way to develop a sense of community.
It costs $29.95 per month or $239 for a yearly subscription, which is comparable to the cost of other music-learning services. It's a good choice if you have a musical background, but it's probably not the ideal choice for novices or small children.