rewrite this title Stablecoin Rails Company Kast Pays Stablecoin Yield with Gauntlet’s Vault – Finovate

Kast has launched Kast Earn, a yield-bearing cash management feature that uses Gauntlet’s institutional-grade DeFi vaults to generate variable APY (currently 4%–9%) on user deposits.

User funds are deployed via onchain lending strategies and actively managed using quantitative risk models, with earnings accruing continuously and remaining liquid through Kast’s spending account.

The move positions Kast in direct competition with banks and money market funds.

Stablecoin-based challenger bank Kast is making its stablecoin banking platform more enticing this week. The company is launching Kast Earn, a tool that allows accountholders to earn yield on funds in their account.

Powered by Gauntlet, Kast Earn will employ users’ deposits for onchain lending, allowing users to earn yield on fiat funds in their account. Founded in 2018, Gauntlet offers an automated risk platform with institutional-grade vaults that enable decentralized finance to provide risk-adjusted yields at scale. Kast said it partnered with Gauntlet because of its experience building quantitative decentralized finance strategies.

When a user deposits US dollars, their funds go into the Gauntlet USD Alpha vault, which is designed to generate sustainable yield by prioritizing long-term, risk-adjusted returns and proactively adapting as markets change. This vault has $73.8 million in total value locked, or TVL (roughly equivalent to assets under management).

Once a user deposits funds, their capital is distributed across a diversified set of established digital lending markets and actively managed using quantitative risk and performance models developed by Gauntlet. The yield compounds continuously through Vault Share tokens, and the users’ earnings are reflected in the rising value of their shares. Accountholders can cash in on their shares at any time by transferring funds back to their KAST spending account. While the rate of return is variable, the vault currently offers a variable APY between 4% and 9%.

Founded in 2024, Kast bridges traditional finance and decentralized finance by offering a digital money app where users can deposit cash, USDC/T, and crypto. It also allows users to spend their crypto like cash with its Solana payment cards that are accepted at more than 150 million merchants and ATMs and in over 160 countries.

In 2025, Kast evolved from a simple solution to spend stablecoins into a full-fledged global money app. Last year alone, the company launched MOVE cashback, KAST Convert, USD virtual accounts, global bank transfers, and KAST Tags to add more bank-like functionality.

By offering yield-bearing cash management, Kast is placing itself in competition with banks and money market funds. By embedding onchain lending and quantitative risk management directly into a consumer-facing banking app, Kast is testing whether DeFi-based yield products can be delivered with the simplicity, liquidity, and trust. If users are able to trust Kast’s offerings as much as those from their traditional financial institutions, offerings like Kast Earn could change how both challenger banks and incumbents think about generating returns on customer balances in a stablecoin-driven financial system.

Views: 65