IoTeX is developing a privacy-centric blockchain platform for the Internet of Things (IoT). Their decentralized network is designed to enable better cooperation and exchanges of data between devices, in a way that will be scalable and will protect the privacy concerns of users. The IoTeX network is currently powered by the Ethereum-based IOTX token.

SmartMesh is developing a blockchain-based protocol for the Internet of Things. SmartMesh has built-in blockchain light nodes, and extends the Raiden and Lightning Networks' second layer architecture network protocols. SmartMesh's blockchain-based network allows devices to communicate and make transactions without an internet connection. Users establish P2P connections when they are online, and are then able to transact with each other offline. Spectrum and Ozone, which are part of the SmarMesh network, are designed for developing decentralized applications.
The SMT token is used to reward the nodes that contribute computing resources to SmartMesh's network, and are also the medium of exchange for P2P transactions.

IOTA was specifically designed to manage transactions for the rapidly growing network of devices that are connected to the internet. Instead of focusing on peer-to-peer transaction, IOTA aims to create the underlying infrastructure that will allow self-regulating transactions to occur between machines (watches, refrigerators, TVs, cars, etc.) on the Internet of Things.
Although IOTA cannot be strictly defined as a blockchain protocol, it uses a distributed ledger protocol called a Tangle, that has many of the same trustless features, but is fundamentally different because it has a different data structure that does not depend on blocks. The IOTA Tangle is a decentralized architecture with no transaction fees and no limitations on the amount of transactions that can be confirmed.
IOTA has several innovative features that are aimed at solving the scalability problems of blockchains. The Tangle drastically improves transaction times and reduces the storage requirements that are typical of other decentralized transaction protocols. This is achieved by removing the necessity of miners to confirm transactions, and making validation an intrinsic aspect of using the platform.