IOTA is an open-source distributed ledger protocol launched in 2015 that goes ‚beyond blockchain‘ through its core invention of the blockless ‚Tangle‘. The IOTA Tangle is a quantum-resistant Directed Acyclic Graph (DAG), whose digital currency has a fixed money supply with zero inflationary cost.
IOTA uniquely offers zero-fee transactions & no fixed limit on how many transactions can be confirmed per second. Scaling limitations have been removed, since throughput grows in conjunction with activity; the more activity, the more transactions can be processed & the faster the network. Further, unlike blockchain architecture, IOTA has no separation between users and validators (miners / stakers); rather, validation is an intrinsic property of using the ledger, thus avoiding centralization.
IOTA is focused on being useful for the emerging machine-to-machine (m2m) economy of the Internet-of-Things (IoT), data integrity, micro / nano-payments, and other applications where a scalable decentralized system is warranted.