The pie chart presents the distribution of Blockchain & Distributed Ledger projects by platform type (permissioned vs permissionless) developed worldwide by companies and surveyed by the Observatory in the period 2016-2020. Platforms that require registration and identification to access the network and therefore approval from a central authority or the network itself are considered Permissioned. Whereas permissionless are platforms to which anyone can participate and freely perform any type of activity, and in which the public ledger content is public and available to everyone.