Osero raises $13.5 million to boost yield access for Sky stablecoins
Osero, a stablecoin yield infrastructure startup incubated by Stablewatch, has raised $13.5 million in a round led by the Sky Ecosystem, formerly known as MakerDAO. The capital will be used to expand access to the Sky Ecosystem’s stablecoins, USDS and sUSDS, through savings and yield products aimed at both individuals and platforms.
The round was co-led by Plasma, developer of a Layer 1 blockchain focused on stablecoin payments. Other participants included RedStone, The Rollup, Kairos Research, Maple co-founder Flanagan, and USDT0 co-founder Romagnoli.
The raise began in December and closed in March using a simple agreement for future tokens (SAFT). Founder Saczuk declined to share Osero’s valuation. No participants took board, advisory, or observer seats.
Funding details
Osero’s funding round underscores growing interest in yield infrastructure tailored to stablecoins, particularly within the Sky Ecosystem. By structuring the raise through a SAFT and avoiding board or advisory commitments, Osero maintains operational independence while aligning closely with the Sky stablecoin roadmap.
Role within the Sky Ecosystem
Osero positions itself as a distribution agent for the Sky Ecosystem, which operates with a structure that Saczuk compared to a central bank, relying on independent entities to reach different market segments.
Stablewatch incubated Osero over the past year in collaboration with Soter Labs, which manages governance operations for the Sky Ecosystem. Saczuk said Stablewatch remains self-funded and has not accepted outside capital.
Product suite: app, earn, and foundry
Osero is building three core products designed to bring stablecoin yield access to both individuals and institutions.
Osero app
Osero App is a web platform designed to let individuals and institutions earn returns from USDS and sUSDS with a simplified user experience. By abstracting away onchain complexity, the app aims to make stablecoin yield products accessible to users who may not be familiar with DeFi tooling.
Osero earn
Osero Earn is an embedded service that enables financial platforms to offer yields on stablecoin balances without managing underlying strategies. Platforms can integrate Osero Earn to provide users with yield-bearing stablecoin accounts, while Osero handles the back-end yield generation and risk management.
Osero foundry
Osero Foundry is an infrastructure tool intended to help asset managers and issuers launch tokenized financial products onchain. By providing tooling and rails for tokenization, Foundry targets institutions that want to package traditional financial products into blockchain-native formats.
Saczuk did not provide a launch timeline for any of these products.
Capital reserve and risk framework
Of the $13.5 million raised, $10 million will be held as a capital reserve. The reserve is intended to meet internal risk and regulatory requirements and to safeguard both Osero users and Sky Protocol operations.
Each capital deployment will be evaluated using a risk management framework based on Basel III banking standards. The use of a Basel-aligned framework is positioned as a way to appeal to more risk-averse institutions by adopting familiar compliance and risk practices from traditional finance.
Global Basel standards are themselves being updated, with potential changes expected around 2026 that could affect how regulated firms are allowed to handle digital asset exposure.
Business model and hiring plans
Osero plans to generate revenue from two main sources:
- a share of revenue generated by USDS and sUSDS balances held across integrated platforms
- the spread between yields earned on institutional asset placements and the rates paid on borrowed capital
The company currently employs 13 people and plans to expand in credit strategy and business development roles, signaling a focus on both risk management and partnerships.
Market context and competition
The move comes as the stablecoin market continues to grow. Total stablecoin market capitalization has surpassed $320 billion, with transaction volumes in 2025 exceeding $33 trillion.
New entrants are competing with established leaders that control most of the circulating supply. To gain share, they must offer compelling incentives or features to attract liquidity.
Osero’s focus is on simplifying access to yield on stablecoin holdings. This places the company in a crowded segment where sustainable yields on major platforms generally range from about 3% to 8%, while more complex strategies sometimes advertise higher but riskier double-digit returns.
Market participants are likely to track:
- adoption of the Osero App by retail and institutional users
- integration of Osero Earn into other financial platforms
- the growth of USDS and sUSDS in circulation, including on networks like Avalanche, where Sky stablecoins recently expanded natively
Plasma’s role and broader infrastructure bets
Plasma’s participation in the round ties Osero to a broader stablecoin-focused infrastructure play. Plasma operates a Layer 1 blockchain designed specifically for stablecoin payments and has seen its total value locked climb above $2 billion after being selected as a core supported chain for Tether’s self-custody wallet.
That growth highlights how targeted integrations can quickly move capital. The performance of Osero and related platforms will be watched as a test of whether purpose-built blockchains and specialized yield infrastructure can secure a lasting niche against more general-purpose networks and offerings.
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