Union is the frontrunner in all metrics when compared to other solutions that pursue the same mission of building a secure, decentralized and efficient connection between Ethereum and IBC:

Union is the only solution that scales to thousands of chains while preserving efficiency, security, and decentralization. In a modular future of thousands of chains driven by the proliferation of AppChains, Rollups, and Network Extensions across Ethereum, Bitcoin, and Solana, Union’s hub-and-spoke model is the only scalable solution. Layer on top zero-knowledge verifications, Union brings forth a hack-free interop future and puts a top to billions of dollars hacks in bridges.

Due to the O(n2) complexity nature of point-to-point models vs hub-and-spoke models, Union has a fundamental architectural advantage over most of its competitors.

https://lh7-rt.googleusercontent.com/docsz/AD_4nXfWLv7IALwucBaLKZc_5MXWyJbsUZ8AQrvJ5po3DkDDlA9pD6cfItvHQYreUYTa2W3gX3FiNTjcMTItiRKYy0qcsJUwtLKu1KCY4aiPMpKa22W9PAVAzjv0ov3aIovf2iE21BF_UYWh7zmKj9r8iWyDaZuc?key=6qr7DsYPaDwqoitAyRk0LQ

Union outperforms competition across all metrics:

Notes:

• LayerZero utilizes a 2/2 multi-signature system where both a relayer and an oracle must agree on specific data to be transmitted.
• Axelar: Our settlement time to Ethereum is faster than Axelar’s. In addition, Union’s use of consensus verification makes it much more scalable than oracle-based solutions like Axelar which can only support ~100 chains. Each new chain still requires N-1 number of corresponding chains for verification.
• Wormhole: Similar to Axelar, Wormhole cannot effectively scale beyond 100 chains without incurring significant operational overhead
• Polyhedra (ZkBridge): Scales computation over hundreds of machines, making it economically infeasible for any decentralized party to contribute to proving.
• Polymer Labs: Their focus is on optimizing Tendermint BFT, which typically takes about 5–10 minutes to generate a zk proof. In contrast, our CometBLS consensus engine generates a zk proof in just a couple of minutes.

See Union’s latest research on gas efficiency against competitos here:

https://research.union.build/zkGasm-II-12e79e5af45d8038b075f64da60f4b64

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