IOTA is an open source distributed ledger that is designed to execute and record transactions in the Internet of Things IoT. According to research, more than 20 million devices connected to the internet with the Internet of Things ecosystem. Each device exchange payments information’s and data with several other devices in transactions connected throughout the day. Its main aim is to solve performance issues and key scalability with bitcoin by replacing the blockchain with Tangle; a system of nodes in which each new transaction confirms two previous transactions. IOTA offer features like fast and secure transactions, scalability and zero fee.