Openverse Global is a Layer0 hub network based on blockchain technology. It is based on the existing blockchain technology and proposes the concept of "fully open protocol cross-chain". It will realize "the transmission of value (token/NFT/message) between different blockchains, metaverses and the traditional Internet is as simple as sending email". Openverse has proposed protocol systems such as the "Bitcurrency VRC10 Protocol", "Privcurrency VRC11 Protocol", and "Public Currency Issurance Mechanism, PCIM".

Hyperlane is the platform for developers building the interchain universe. It provides an on-chain API for sending information between blockchains. Developers can use Hyperlane as an API to easily and securely communicate between blockchains, or they can utilize the Hyperlane SDK and tooling to quickly build interchain applications.

Omni is the Ethereum interoperability layer enables developers to program global applications that span Ethereum’s entire rollup ecosystem. When developing applications, developers won't have to be restricted to a single rollup or execution environment anymore; they will be able to build applications that exist everywhere in Ethereum's ecosystem, accessing all users and capital simultaneously. Omni was formerly known as Rift Finance, the DeFi protocol that provides financial services for Web3 projects.

Axelar is a decentralized cross-chain communication network, aiming to level-up interoperability in Web3 by connecting heterogeneous blockchains and enabling asset mobility and program composability in an optimized way for both builders and end-users. The two layers of Axelar are the network and the API above it. At the core of Axelar is a permissionless overlay network that provides Turing-complete cross-chain communication through proof-of-stake and permissionless protocols. On top of the network are APIs and protocols, an application-development layer that developers use to compose across any number of chains. Once integrated, all new interconnected blockchains become interoperable with the application, resulting in limitless network effects.

ZetaChain is the foundational, public blockchain that enables omnichain, generic smart contracts, and messaging between any blockchain. ZetaChain envisions and supports a truly fluid, multi-chain crypto ecosystem. These "omnichain" smart contracts can send data and value between connected blockchains, including Ethereum, Polygon, Binance Smart Chain, and eventually, non-smart chains such as Bitcoin and Dogecoin. ZetaChain is built on Cosmos SDK and Tendermint Consensus.

exSat is a Docking Layer that was built to bridge the gap between Bitcoin’s native layer and a multitude of Layer 2 scaling solutions for the Bitcoin ecosystem. By facilitating direct queries of BTC and ecosystem token balances, exSat enables a seamless flow of assets and information across different networks and Bitcoin Layer 2 scaling solutions.

Router Protocol is a cross-chain messaging protocol that uses a mesh network architecture to facilitate communication between different chains. Router offers a suite of products, including its main application, Voyager, a flexible widget, and an SDK called CrossTalk.

PicWe is a decentralized, trustless, omni-chain liquidity infrastructure enabling seamless, cost-efficient trading across multiple blockchains and liquidity pools.

MailZero is a platform that enables Web2 to Web3 interoperability for Stamp2Earn.The underlying layer that MailZero plans to develop hopes to achieve the vision of true interoperability by connecting all chains, whether they are part of the EVM ecosystem, IBC ecosystem, or other ecosystems. Users will no longer be constrained by whether mainstream protocols support certain chains.

Polymer is the interoperability uub of Ethereum. Polymer provides IBC execution to connected Layer 2s without requiring a native IBC integration, enabling new L2s to permissionlessly connect to the IBC network. Polymer enhances composability between Ethereum rollups while leveraging IBC’s expanding network of applications.

deBridge is a secure interoperability layer for Web3 that enables decentralized transfers of arbitrary messages and value between various blockchains. Validation of cross-chain transactions is performed by a network of independent validators, elected by and working for deBridge governance. These validators maintain the blockchain infrastructure and each run a deBridge node to sign all transactions that pass through deBridge smart contracts in different blockchains.

Zeus Network serves as a crucial permissionless layer, harnessing the formidable strengths of both Solana and Bitcoin, that enables dynamic, secure composability, creating a decentralized ecosystem for seamless user engagement and liquidity interaction. Zeus Network is NOT a bridge. Because liquidity providers on each chain do not receive liquidity back on the other chain, the assets provided on each chain are protected by their respective protocols.

Analog is a completely decentralized layer-0 platform for communicating validated event data with the Proof-of-Time consensus mechanism. At the core of the platform are tesseracts and time nodes that can privately fetch and confirm event data from sovereign chains, allowing different ecosystems to speak the same language. Analog aims to bring trustless, omnichain interoperability, enabling developers to build their applications via a universal protocol and an API. Additionally, Analog is unveiling a novel, superfast PoT protocol that creates verifiable event data on the Timechain, allowing DApp developers to build next-generation event-based applications.

IBC is an open-source protocol developed by a global community, funded by the Interchain Foundation. It aims to enhance cross-chain communication's robustness, security, and functionality, maintained and evolved by various organizations.

GVNR is a General Message Passing Protocol that enables seamless connection between every compatible chain, peer-to-peer. GVNR is built for all users and especially AI Agents. GVNR enables permissionless universal control of all chains and all assets. GVNR can be deployed to any permissionless or permissioned blockchain, and will be self-deployable by chains, foundations or enterprises that wish to access the widest possible liquidity.

LI.FI is a bridge aggregation protocol with DEX connectivity and cross-chain data messaging capabilities. All of these functions will be made available on an API/Contract level, and as a widget for other developers to plug directly into their products.

Hyperbridge is a cryptoeconomic coprocessor for secure, verifiable interoperability powered by consensus and storage proofs. Hyperbridge is the HTTPS of blockchain interoperability, providing developers with onchain and off-chain SDKs for securely sending cross-chain messages (POST requests) and reading on-chain storage (GET requests).

Stripchain is a cross-chain interoperability protocol allows developers to create commands called intents to perform actions like transferring data between blockchains. Based on a system called stripVM, it will enable applications to communicate and coordinate with different protocols.

TeleSwap is a trustless and universal interoperability protocol that provides developers with an infrastructure to build cross-chain applications. With it, users can transfer any data, such as messages, contract calls, tokens, or NFTs, between blockchains.

Darwinia is a cross-chain messaging infrastructure that offers a reliable and programmable platform for decentralized applications. It provides developers with an SDK, allowing them to easily integrate cross-chain capabilities into their Dapps.

oooo is a modular omnichain interoperability protocol supporting the Bitcoin ecosystem. Its modular communication protocol architecture ensures the integrity and reliability of data and transactions within the system. This approach resolves blockchain isolation and liquidity fragmentation, boosting capital efficiency and utilization, and ultimately improving the user experience. oooo is pioneering the next evolution in blockchain interoperability by introducing AI Omninet — an intelligent protocol that transforms cross-chain intents into seamless operations.

Glacis is a protocol that empowers developers to simplify, secure, and manage their cross-chain applications. Developers are shifting from single chain to multichain deployments to reach as many users as possible. By leveraging Glacis to aggregate cross-chain General Messaging Passing protocols (GMPs) such as Axelar, Wormhole, and LayerZero — commonly known as bridges — developers gain the ability to define routing and security logic for their cross-chain applications.

Sygma is a cross-consensus interoperability protocol, enabling general message passing, asset transfers, non-fungible tokens, and decentralized finance. Evolved from the humble beginnings of ChainBridge, it provides native interoperability between the Ethereum and Polkadot ecosystems.

Paloma is a fast, permissionless, Cosmos-SDK blockchain that securely moves messages between any other blockchains. It is designed for developers who want to manage bi-directional messages between chains in a secure and scalable way. Volume provides blockchain messaging software that is secure, scalable, and enables developers to communicate across multiple blockchains at the lowest cost.

Electron Labs is an universal ZK-proof aggregation layer for Ethereum. It uses light clients and zero-knowledge proofs to maintain decentralization. Electron uses UPA underneath to aggregate proofs from multiple source into a single superproof, thus amortizing the cost per use case.

Satoshi Protocol is a cross-chain messaging bridge built on BTC-Light-Node and Chain Abstraction technology.

Elk is a peer-to-peer network for cross-chain value transfers and blockchain interoperability. ElkNet, the powerful cross-chain engine at the heart of the network, enables secure and efficient transfers of value and information, reducing friction and asset fragmentation between blockchains. Community projects and developers can also build dynamic multi-chain applications that leverage ElkNet with features such as proxy tokens and cross-chain messaging.

MAP Protocol is the interoperable layer for the Bitcoin network, built upon ZK light-clients. It is the gateway for Bitcoin ecosystem developers and users and the way for different Bitcoin L2s as well as the Bitcoin ecosystem to become interoperable with EVM & non-EVM ecosystems.

MultichainZ is a cross-chain interoperability protocol acts as a unifying layer, allowing different blockchain networks to seamlessly interact, communicate, and transact with one another.

Auran is building the first cross-chain Bitcoin protocol based on its own custom L1 built with Cosmos SDK, Tendermint, and a decentralized TSS network. This protocol serves as a liquidity layer, bridging the nascent Bitcoin Layer 2 (L2) ecosystem with the Bitcoin blockchain. It enables users to conduct native swaps, with support for principal metaprotocols such as Runes, BRC20s, and Ordinals. Additionally, the protocol integrates a messaging system that enables cross-chain smart contract interactions within the Bitcoin ecosystem.