IOTA DAG for IoT

Market position

IOTA was one of the first crypto projects to use a DAG rather than a blockchain as its distributed ledger, and as of 2020 was described as the largest DAG by market capitalization, with MIOTA consistently ranked among the top-50 crypto coins. It competes with other DAG-based ledgers such as Nano and Hedera Hashgraph, and positions itself against high-fee, lower-throughput blockchains including Bitcoin and Ethereum. The IOTA Foundation is a board member of the International Association for Trusted Blockchain Applications (INATBA) and a founding member of the Trusted IoT Alliance and the Mobility Open Blockchain Initiative (MOBI).

IOTA's distinguishing characteristics are its block-less DAG ledger, in which any transaction can be validated by multiple other transactors concurrently, the absence of dedicated miners and transaction fees, and claimed throughput of several thousand transactions per second versus the tens of TPS typical of many blockchains. The company additionally cites permissionless access, energy efficiency, censorship resistance and equitable tokenomics, together with a Move-based mainnet paired with EVM support and native identity features for verifying tokenized asset authenticity.

Technology

The core technology is the Tangle, a directed acyclic graph ledger in which transactions reference two prior transactions instead of being grouped into blocks, motivated by higher scalability than blockchain-based ledgers and enabling feeless microtransactions. The ledger uses the Ed25519 hash function with a supply limit of 2,779,530,283,277,761 tokens. Consensus historically depended on a Coordinator node run by the IOTA Foundation that issued milestones, making the network centralized and creating a single point of failure; the Coordicide/IOTA 2.0 program aims to remove it. The present stack centers on a Move-based Layer 1 mainnet with object-centric architecture, EVM compatibility, parallel transaction processing for scalability and instant settlement, and the Starfish consensus protocol, plus modular components for identity, tokenization, hierarchies, notarization, audit trails and a gas station, and programmable transaction blocks with shared objects and dynamic fields.

Go-to-market

Adoption is pursued through open-source developer documentation, guides, tooling and a workshop series covering Move package publishing and programmable transaction blocks; community events, hackathons, meetups and a builder Discord; and the IOTA Business Innovation Program, which provides technical resources, community support and funding. Ecosystem and lighthouse projects with named partners serve as reference deployments, and the Imperial College London I3-Lab supports translational research.

Web3 developers and builders of varying skill levels, node operators and token holders who stake, and enterprises and public-sector bodies pursuing real-world asset tokenization, digital identity, compliance traceability, trade finance and circular-economy applications.

Geography

The IOTA Foundation is chartered as a Stiftung in Berlin, Germany. The IOTA Ecosystem DLT Foundation was established in the United Arab Emirates in November 2023 under the Abu Dhabi Global Market to support growth in the Middle East, and the I3-Lab operates at Imperial College London in the United Kingdom. Lighthouse work includes a pan-European blockchain procurement project.

History

After the 2015 conception and the 2016 network launch, early IOTA token investors donated 5% of the total token supply in 2017 to fund continued development and endow what became the IOTA Foundation, which was chartered as a Stiftung in Berlin in 2018 for research, development, education and standardization of IOTA technology. In September 2017 researchers from Boston University and MIT's Digital Currency Initiative reported potential security flaws in the Curl-P-27 hash function, an episode that drew criticism of the Foundation's response. Co-founder Sergey Ivancheglo resigned from the board on 23 June 2019 following a dispute with David Sønstebø, and on 10 December 2020 the Foundation announced it had parted ways with Sønstebø. The Chrysalis (IOTA 1.5) network update launched on 28 April 2021. In November 2023 the IOTA Ecosystem DLT Foundation was established in the United Arab Emirates, the first crypto-centric organization approved by regulators of the Abu Dhabi Global Market, and in 2024 IOTA was certified as Sharia-compliant. Also in 2024, the Imperial IOTA Infrastructures Lab (I3-Lab) launched at Imperial College London.

Risks & controversies

IOTA has drawn criticism for an unusual design whose practical viability has been questioned and for reliance on a centralized Coordinator node that constitutes a single point of failure. In September 2017 researchers from Boston University and MIT's Digital Currency Initiative disclosed potential flaws in the Curl-P-27 hash function; the Foundation faced backlash over its handling, with FT Alphaville reporting legal posturing by a founder against a security researcher and aggressive language toward journalists, and University College London's Centre for Blockchain Technologies severing ties over legal threats. Security incidents include the January 2018 seed-generator scam in which more than US$10 million of tokens were stolen from over 85 victims (an arrest followed in Oxford, England in January 2019), and a November 2019 compromise of a third-party MoonPay payment service integrated into the Foundation-managed wallet that affected over 50 seeds and about US$2 million in tokens. In February 2020 the Foundation shut down the Coordinator, effectively halting the network until it was restarted on 10 March 2020. Governance disputes led to Sergey Ivancheglo's board resignation in 2019 and the separation from David Sønstebø in December 2020. Critics also note that throughput claims remain untested at scale and that progress on removing the Coordinator has been slow.