What Is DeFindex? Stellar Yield Vaults for Wallets and Fintechs

DeFindex is built for companies first. A partner integrates its API once, chooses which strategies its vault may use, and sets its own fee. It then shows users a single balance and APY ¹. The Stellar Development Foundation named the Beans wallet as one app that routes deposits through DeFindex ¹¹. If you hold a balance in a Stellar wallet that advertises "earn" on stablecoins, DeFindex may be the layer underneath. Check that wallet's disclosures to confirm.

DeFindex has three on-chain parts:

1. Vault. This is the contract users deposit into, usually one per partner. It is the only layer that holds funds. It issues share tokens (dfTokens) and reports one balance and APY ¹.
2. Strategies. Each strategy is a small contract that knows how to supply funds to one yield source and withdraw them. DeFindex writes and audits each one before release ¹. Current strategies are ³⁷:
   • Blend Autocompound supplies USDC, EURC or XLM to Blend lending pools and reinvests the reward emissions.
   • K2 Autocompound does the same on Kinetic lending, supply-only with no borrowing.
   • RWA Wrapper holds a value-accruing sovereign bond token (CETES, Mexican government bills) against USDC.
3. Yield sources. Blend, Kinetic and the bond issuers are separate protocols run by their own teams ¹⁷.

A vault's set of strategies is fixed when it is created. No vault function can add or swap a strategy later. Only a contract upgrade can change it, and only on vaults deployed as upgradable ⁵. For background on reward-reinvesting strategies, see yield farming.

Each vault has four roles ⁴:

According to the docs, none of these roles can withdraw user funds, send assets to an arbitrary address, or freeze deposits and withdrawals ⁴⁵. These are design claims that can be checked in the open-source contracts. They are not a guarantee against bugs.

DeFindex charges only a performance fee on yield, never on principal ². The partner sets the rate, and the fee is split between the partner and the DeFindex protocol. The docs don't publish the split ². There are no deposit or management fees by default. The APY returned by the API is already net of fees ².

Docs example: with a 20% fee, a 1,000 deposit that earns 100 pays 20 in fees, leaving the user with 1,080 ². Stellar network fees apply to transactions. Partners can sponsor them through fee-bump transactions.

Partners can display a fixed rate instead of a floating one. DeFindex then adjusts the vault fee within a floor and ceiling the partner chooses. If yield runs above the target, the excess becomes fee revenue. If it falls short, the fee drops toward the floor. Once the fee is at its floor, only extra money the partner adds through a separate product, Boost, can close the gap ⁸. A "fixed" rate in an app built on DeFindex is therefore a partner commitment backed by the partner's own funding. It is not a protocol guarantee.

DeFindex describes itself as non-custodial. It says it never holds users' keys and is not a bank, custodian or broker ⁹. Its listed risks are ⁵:

• Smart-contract risk. The docs say plainly that in a hack "funds could be at risk."
• Underlying-protocol risk. A loss or freeze at Blend, Kinetic or a bond issuer flows through to the vault.
• Asset risk. Stablecoins can depeg, and bond tokens depend on their issuer and currency (see types of stablecoins).

Audits: OtterSec reviewed the vault, factory and Blend strategy (March 2025). Runtime Verification reviewed the Stable APY contracts (July 2026). Halborn reviewed the Kinetic and RWA Wrapper strategies (September 2026) ⁵. An audit is a point-in-time review, not insurance. No DeFindex-specific bug bounty is listed ⁵.

Track record: DefiLlama first listed DeFindex in February 2026, so its public mainnet history is short ¹⁰.

Users deposit through the partner app, which builds the transaction with the DeFindex API and asks the user to sign it. Withdrawals are always open according to the docs, and no role can block them ⁵. If a strategy is rescued during an emergency, its funds return to the vault as idle balance that users can withdraw ⁵. Liquidity inside an underlying pool, such as a highly utilized Blend pool, can still delay how quickly funds come back from that strategy.