While there is no single standards organization and practitioners practice as they will, some choose to form Reiki communities to bring together often diverse knowledge and experience. Some of these communities have grown out of informal groupings of practitioners who organized Reiki circles for working together, while others have formed around a particular school or teacher.

Many of the Reiki communities also emerged due, in part, to the expanding popularity of the internet. Global initiatives have been introduced (like healing the planet or global peace fostering) and a great deal of online services (like training and healing) is available.