Online therapy for depression is identical to in-person therapy, but the persons communicate with their therapists virtually through online platforms like chat, video conferencing, emails, etc. The best thing about these is that you can try them in your own time, and when you are perfectly comfortable and happy, you should carry on with the therapy. Usually, the sessions last for a minimum of an hour. Of course, it also depends on the therapist and your requirement.
You can also avail of Skype, web conferencing, or video chat services when you seek online therapy. It depends on you and the extent of the problem. However, this mode of therapy can prove helpful for those who need it the most. Online therapy for depression too is available via live chat services, online chat rooms, online forums, and many other online platforms too.