Constant Finance Opens Public Beta for Fixed-Rate, Fixed-Term DeFi Lending

Now available on Ethereum’s Sepolia testnet, the product combines financing terms selected upfront with built-in refinancing.

Constant Finance, a fixed-rate, fixed-term DeFi lending protocol, today announced that the public beta of its lending product is now available on Ethereum’s Sepolia testnet. The beta gives borrowers, lenders, and DeFi users a hands-on way to explore loans with an agreed rate and maturity while helping the team improve the product before mainnet.

A Rate Is Not a Financing Plan Without a Term

In many DeFi lending markets, borrowing rates change with conditions in a shared liquidity pool. That flexibility supports open access to liquidity, but the rate displayed when a position opens may not remain the same throughout the loan.

For a strategy with a defined horizon, this creates a planning problem. A borrower may know the current rate without knowing what the capital will cost over the period for which it is needed. The position must be monitored as utilization changes, and its economics may need to be recalculated along the way.

Variable-rate lending is not broken; floating-rate credit serves a real purpose. It simply does not fit every financing need. Strategies with a known duration require two inputs from the start: a rate and an end date.

Terms Selected Upfront, Loan by Loan

Constant Finance is built around fixed-rate, fixed-term loans. Borrowers and lenders select an interest rate and maturity at origination rather than inheriting an open-ended rate generated by a pool-wide utilization formula.

The product uses signature-based order matching so participants meet on terms they chose. Once matched, each agreement becomes a discrete on-chain loan with its own principal, rate, maturity, and collateral, rather than a proportional position in a shared lending pool. This makes the financing terms explicit at the individual-loan level.

Known terms do not remove smart-contract, collateral, or liquidation risk. They make one part of the agreement explicit and calculable: the scheduled rate and duration established when the loan begins.

Constant Finance also includes built-in refinancing. When an eligible position no longer fits a borrower’s needs, the refinancing flow replaces the existing loan with new terms in a single transaction. Fixed terms therefore do not require borrowers to predict every future change perfectly. They provide a defined starting agreement and a direct path to seek different terms when circumstances change.

“A borrowing rate is only part of a financing plan; the term matters too,” said Cola, Founder at Constant Finance. “Constant Finance is designed so borrowers and lenders can choose both upfront. The public beta lets users test that structure directly and helps our team identify what still needs to become clearer before mainnet.”

Public Beta on Ethereum Sepolia

The public beta runs on Ethereum’s Sepolia testnet and uses test assets with no monetary value. A faucet is built into the Constant Finance interface, allowing participants to request test tokens without leaving the product.

Testers can review lending and borrowing offers, choose a rate and maturity, create or take an offer, monitor a position, repay a loan, and try refinancing. Constant Finance is seeking feedback on the clarity of terms, wallet and transaction prompts, position status, repayment, refinancing, error handling, and general usability.

The public beta is available at app.constant.finance. Instructions are available at https://constant-finance.gitbook.io/docs/quick-start, and reproducible issue reports can be submitted through the Discord beta-test channel.

The beta is experimental. Features, interfaces, supported assets, and workflows may change before mainnet. Test assets are not real funds, and participation does not guarantee rewards, allocations, eligibility for future programs, or financial returns. Users should never share a recovery phrase or private key.

About Constant Finance

Constant Finance is building fixed-rate, fixed-term lending infrastructure for decentralized finance. Its product enables borrowers and lenders to select an interest rate and maturity in advance and includes built-in refinancing when financing needs change.

Learn more at constant.finance and follow Constant Finance on X.