Chain Fusion vs Zeus Network: Bitcoin access compared (2026)

Chain Fusion and Zeus both let users use Bitcoin-linked assets beyond Bitcoin, but their designs and reach differ. Chain Fusion connects Bitcoin and Ethereum through the Internet Computer’s chain-key system. Its canisters use threshold signatures to sign transactions on other chains, and its underlying wallets are managed by smart contracts rather than an intermediary. It offers ckBTC and ckETH and does not require a separate project token.

Zeus focuses on locking native BTC and issuing zBTC for use in DeFi. It uses an MPC and Guardian setup, and lists zBTC on Solana, Ethereum, Base, and Sonic. Its ecosystem also includes ZEUS delegation and BitcoinKit for developers. The key choice is between Chain Fusion’s protocol-level approach and Zeus’s wider set of stated destinations and DeFi routes. Zeus names more chains, while Chain Fusion has the higher TVL.

Chain Fusion describes chain-key token transactions as reaching finality in about one second with negligible fees. However, it does not publish specific fee levels or the costs of minting and redeeming. Users should also account for the underlying network fees when moving assets in or out, particularly on Bitcoin or Ethereum.

Zeus does not publish fees for minting zBTC, redeeming BTC, or using its bridge. Network fees on Bitcoin and the destination chain may apply, as may fees from third-party DeFi protocols where zBTC is used; amounts are not published. In either case, check the relevant wallet or interface before committing funds. Chain Fusion gives a qualitative claim about low transaction fees, but neither project provides enough figures here for a precise cost comparison across a full transfer and redemption.

Chain Fusion’s approach avoids a single trusted bridge operator, but it depends on the Internet Computer’s threshold-signature design, canister code, and cryptography. Two audits are listed, yet the auditors and scope are not publicly named. The project describes ckBTC and ckETH as backed 1:1 and redeemable, but contract or signing flaws could still affect redemption.

Zeus says zBTC is pegged 1:1 and has a Proof of Reserves intended to let users verify its backing. Its Bitcoin security depends on the MPC and Guardian setup, so guardian compromise, smart-contract bugs, or peg failure are risks to consider. No audits are listed, and the project launched in 2025, giving it a short track record. Using zBTC in other DeFi protocols adds those protocols’ risks. Neither approach removes the risks of using a tokenized Bitcoin asset; only commit what you can afford to lose.

Chain Fusion has about $23.8 million in TVL, compared with about $1.9 million for Zeus. Those figures suggest Chain Fusion currently has the larger amount of value deposited, though TVL alone does not establish redemption reliability or liquidity for every token. Chain Fusion’s listed scope is narrower: Bitcoin and Ethereum. Its description says chain-key tokens can be redeemed, but detailed minting and redemption limits are not published.

Zeus lists a broader set of chains for zBTC: Solana, Ethereum, Base, and Sonic, alongside Bitcoin as the source asset. Its homepage also describes access to lending, borrowing, staking, and liquidity pools across 16 or more Solana DeFi protocols. These routes can extend what users do with BTC, but they bring additional third-party contract risks. Choose based on the chains and applications you need, not chain count alone, and check current availability and redemption details before transferring assets.

Choose Chain Fusion if you want a BTC or ETH representation using the Internet Computer’s chain-key system, prefer not to depend on a conventional bridge operator, and do not want exposure to a separate project token. Its higher TVL and two listed audits may also matter to users comparing the projects, though the audit details are not named and fees remain unclear.

Choose Zeus if your priority is putting BTC to work through zBTC across Solana, Ethereum, Base, or Sonic, particularly if you want the stated Solana DeFi routes or developer tools. Accept that Zeus has a much smaller TVL, no audits listed, and an MPC and Guardian security model. Neither is a universal winner: Chain Fusion is the more fitting choice for a narrower BTC-and-ETH connection, while Zeus is more suited to users seeking broader chain access and DeFi utility.