Union Labs, a blockchain startup focused on interoperability, has raised $12 million in a Series A funding round led by Gumi Cryptos Capital and LongHash Ventures. The funds will be used to scale the company’s operations, grow its team, and further develop its modular zero-knowledge interoperability layer, which connects major blockchain ecosystems such as Ethereum, Cosmos, and Bitcoin.
This funding round highlights the growing importance of interoperability solutions in the blockchain space, as developers and users increasingly demand seamless communication across decentralized networks.
Tackling Blockchain Fragmentation with Zero-Knowledge Technology
Union Labs’ core product is a modular, zero-knowledge (ZK) interoperability layer that allows for the secure and efficient transfer of assets and messages across blockchain networks. Unlike traditional solutions, which rely on centralized intermediaries or trust assumptions, Union’s ZK approach enables fully decentralized interoperability.
The technology is designed to address one of blockchain’s most persistent challenges: fragmentation. By connecting ecosystems like Ethereum, Cosmos, and Bitcoin Layer 2s, Union aims to create a unified multichain experience for developers, users, and enterprises.
Expanding Ecosystem Connections
Earlier this year, Union announced its integration with Polygon’s AggLayer, signaling deeper connections between Ethereum scaling solutions and Cosmos’ Inter-Blockchain Communication Protocol (IBC). Now, Union is turning its attention to Bitcoin.
Despite being the first blockchain, Bitcoin has historically faced limitations in interoperability due to its scripting constraints. Union plans to address this by enabling secure asset transfers across Bitcoin Layer 2s, bringing the Bitcoin ecosystem closer to decentralized finance (DeFi) and other Web3 innovations.
The company’s mainnet launch is planned for early 2025, which will further expand its reach and functionality, supporting a growing network of interconnected blockchains.
Backed by Leading Investors
The $12 million Series A funding round drew participation from notable investors, including Borderless Capital, along with key figures from the Polygon, Celestia, and Berachain communities. These investments reflect widespread confidence in Union Labs’ mission to reduce fragmentation in Web3 and unlock the full potential of blockchain interoperability.
Founder Karel Kubat emphasized that this funding validates Union’s vision of building a secure, sovereign, and seamless interoperability layer for the decentralized world.
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