DeFi protocol comparison
Compare Ducat's Bitcoin L1 stablecoin loans with Stackit.ai's Aave-based BTC/ETH treasury policy and automation layer.
Last reviewed July 11, 2026 · Official sources linked below
Short answer
Ducat is building a Bitcoin L1-native protocol for borrowing UNIT or USDC against BTC with a one-time fee and no ongoing interest. It is currently labeled mainnet closed alpha/coming soon. Stackit.ai is an Aave-based BTC/ETH treasury-policy layer with a live sandbox and rate data but assisted production access. Both remain availability-sensitive.
This compares product structure, not just the lowest advertised APR. Rates, LTVs, eligibility, fees, and market parameters can change.
| Dimension | Stackit.ai | Ducat Protocol |
|---|---|---|
| What it is | A treasury policy and orchestration layer that uses third-party lending markets. The public product currently includes a self-serve sandbox and live market-rate reads; production access is assisted and the Base production API is marked in development. | An experimental Bitcoin L1-native overcollateralized stablecoin and credit protocol, currently closed alpha/coming soon. |
| Borrow rate | The underlying Aave variable borrow rate is passed through and shown separately from Stackit.ai action fees. Live native-USDC rates are available for Base, Arbitrum, and Polygon. | Ducat advertises 0% ongoing APR plus a one-time 1% origination fee for the described product. |
| LTV and downside response | Rules are designed to monitor LTV and prepare or execute approved repayment actions as risk rises. Exact thresholds and execution depend on the approved policy, liquidity, oracle data, gas, and production availability; liquidation risk cannot be eliminated. | Up to 62.5% of BTC value; liquidation eligibility begins below a 135% collateral ratio under current published mechanics. Users add BTC or repay to maintain collateralization; protocol liquidation, oracle/guardian, software, stablecoin, and availability risks remain. |
| Custody and control | Documented wallet-sovereign flows return unsigned transactions. Delegated automation requires revocable, policy-scoped permission; Stackit.ai says it does not hold private keys. | BTC is locked in a 2-of-2 Taproot vault requiring the user and guardian threshold network under Ducat's design. |
| Term | No separate fixed loan term in the public sandbox; the underlying onchain market determines the debt mechanics. | No fixed term is advertised; repay to redeem BTC, subject to the protocol being available and functioning. |
| Other costs | Aave interest plus published Stackit.ai per-action fees and network/protocol costs. Current fees are itemized in fees.json; protection and repayment actions carry no Stackit.ai fee, though gas and protocol costs can still apply. | One-time origination fee, Bitcoin transaction fees, UNIT/USDC conversion mechanics, and liquidation/stablecoin risks. |
About the alternative
Ducat's current site describes 2-of-2 Taproot vaults, up to 62.5% borrowing against BTC, a 1% origination fee, and liquidation below a 135% collateral ratio. The protocol also discloses experimental software risk and says it is not available to U.S. persons.
The key distinction
Ducat is Bitcoin-only, Bitcoin-L1-native stablecoin issuance. Stackit.ai spans BTC and ETH treasury workflows and relies on EVM lending markets, currently Aave, with policies and agent interfaces above those markets.
Future eligible non-U.S. Bitcoin users who specifically want native Bitcoin L1 collateral without wrapping or bridging and accept closed-alpha protocol risk.
BTC/ETH treasury teams and agents that want EVM market rates, recurring policies, and integration tooling.
No. Ducat's current official site labels the product 'Mainnet Closed Alpha' and 'Coming soon.'
Ducat's current risk FAQ says it is not available to U.S. persons.
Ducat describes a stablecoin-minting protocol with a one-time 1% origination fee rather than ongoing interest. Users still face transaction, stablecoin, liquidation, oracle, and software risks.
Competitor facts come from official product or protocol documentation. Stackit.ai facts come from its public docs, endpoints, and current availability switch. Marketing rates are not treated as guaranteed offers. Review your personalized terms before borrowing.
Educational comparison only; not financial, legal, tax, or investment advice. Crypto-backed loans can lose collateral through liquidation, smart-contract failure, oracle error, market gaps, custody failure, or other execution risks.
Start with live protocol rates, add every fee, then test how your LTV behaves before you choose a borrowing path.
