Osero

Osero is a stablecoin yield infrastructure project focused on providing access to yield-bearing stablecoin products. Its products include Osero Earn, which provides integration infrastructure for platforms, and Osero App, a consumer application that routes stablecoin deposits into sUSDS and the Sky Savings Rate. ^[9]

Overview

Osero Earn is a stablecoin savings infrastructure product that allows fintechs, wallets, exchanges, neobanks, and custodians to offer yield on users' stablecoin balances without building their own DeFi infrastructure or managing the underlying assets. It packages the Sky Savings Rate into a developer-facing SDK that handles stablecoin conversion, approvals, routing through Sky's Peg Stability Module, and deposits into the sUSDS vault across supported chains. Users can deposit supported stablecoins, receive sUSDS, and redeem their positions without lock-ups or withdrawal queues, while Osero remains non-custodial and the underlying yield is generated through Sky Protocol's diversified collateral and lending activities.

Osero also provides transparency and risk-management infrastructure for platforms integrating the product. Its Transparency SDK exposes information on the assets backing the yield, available liquidity, and junior and senior risk capital, while the Integration SDK provides a unified interface for minting and redeeming sUSDS across Ethereum, Base, Arbitrum One, OP Mainnet, and Unichain. The system also supports multi-stablecoin deposits through Enso and provides transaction previews, typed execution plans, and chain-specific routing to simplify integration. The underlying Sky structure uses liquid reserves and onchain money-market positions to support redemptions, while junior risk capital held by strategy participants and Sky's backstop capital provide layers of loss absorption. ^[1] ^[4]

Features

Sky Savings Rate

The Sky Savings Rate (SSR) is the yield mechanism underlying Osero’s stablecoin savings products, with yield accruing automatically to sUSDS, Sky Protocol’s yield-bearing savings token. The SSR is determined through Sky governance and is generated from a diversified balance sheet that, as of August 21, 2026, included USDC stablecoins, onchain and OTC crypto-backed lending, short-duration Treasury bills, AAA corporate debt, and other assets. Osero routes supported stablecoin deposits into USDS and then sUSDS, after which the value represented by each sUSDS token increases as the SSR accrues; users therefore may receive fewer sUSDS tokens than the amount of stablecoins deposited because each token can represent more USDS over time. Sky’s risk framework uses layers of capital, including Junior Risk Capital supplied by ecosystem Agents and Senior Risk Capital provided by Sky, to absorb losses before they reach depositors. The SSR can change through governance, and sUSDS remains subject to risks associated with USDS and Sky Protocol, including stablecoin, smart-contract, market, liquidity, wallet, network, and transaction-execution risks. ^[5] ^[7]

Products

Osero App

Osero App is a non-custodial stablecoin savings application that allows users to deposit supported stablecoins and receive sUSDS, a yield-bearing savings token issued by Sky. The app consolidates the steps normally required to access stablecoin yield, including asset conversion and cross-chain transfers, so users can deposit from different assets and networks without managing the underlying DeFi infrastructure themselves. Users connect their wallet, select the stablecoin and network they want to use, review the proposed route, expected output, and fees, and approve the required wallet transactions before the deposit is completed. Osero uses Enso and LI.FI to handle swaps and cross-chain transfers when required, selecting a route based on the asset, network, and available liquidity. The resulting sUSDS accrues the Sky Savings Rate over time, and withdrawals follow the same routing process in reverse. The application remains non-custodial, with users retaining control of their funds and approving the transactions required to deposit or withdraw. ^[3] ^[6]

Funding

Osero announced its $13.5 million funding round in May 2026, with the round led by the Sky Ecosystem through its genesis capital allocation and co-led by Plasma. Additional participation came from angel investors associated with Spark, USDT0, Maple Finance, Accountable, RedStone, RollupTV, Four Pillars, and Kairos Research. The funding accompanied Osero’s launch following a year of incubation by Stablewatch and was intended to support its stablecoin yield infrastructure, including products that provide access to the Sky Savings Rate through platforms such as wallets, exchanges, and neobanks. Osero operates as a legally separate foundation from Stablewatch, with Stablewatch serving as a contributor and Soter Labs supporting its incubation, governance, and operations. ^[2]