Mellow Protocol
Infrastructure for institutional vaults and onchain yield — built on Ethereum, designed for capital that demands precision.
Mission
The team behind Mellow Protocol set out to solve a specific gap. Onchain capital management lacked the primitives that institutional participants actually need. Not just basic deposit-and-earn mechanics, but programmable vault logic with curator-defined strategies, risk parameters, and composable yield layers.
That gap is what Mellow Protocol addresses. The protocol lets curators — asset managers, DAOs, and protocol treasuries — deploy vaults with defined strategies on Ethereum. Each vault handles risk controls, asset routing, and yield distribution through smart contract logic rather than manual intervention.
The mission is narrow on purpose. Mellow Protocol does not try to be a lending protocol, a DEX, or a portfolio tracker. It does one thing: provide the infrastructure layer that makes institutional-grade vault management viable onchain.
Technology
Mellow Protocol operates through a modular vault architecture. At its core, each vault is an ERC-20 token representing a share of the underlying strategy. Depositors receive vault tokens; curators configure the logic that determines how those assets are deployed across one or more DeFi protocols.
The protocol integrates with Lido's stETH and wstETH primitives, restaking infrastructure, and various Ethereum-based yield sources. Version 2 of the Mellow Protocol protocol introduced expanded curator controls and multi-asset support. Networks currently supported include Ethereum mainnet, Mezo, and Rootstock.
Security is handled through multiple audited contracts. The codebase has been reviewed by OpenZeppelin, ChainSecurity, Statemind, Sherlock, Decurity, and Nethermind — six independent firms. That breadth of review is not standard for protocols of this size. Visit the vault listing to see active deployments, or read the protocol questions page for technical detail.
Approach to Yield
Most yield aggregators abstract strategy selection away from users. Mellow Protocol takes a different position. The platform makes curator identity and strategy logic visible. Users selecting a vault can see which curator manages it, what the underlying yield source is, and what the 7-day moving average APY has been.
Yield sources span staking rewards from Lido (currently around 3.3% APR on ETH), decentralized validator infrastructure through the DVstETH vault (combining Lido staking, Obol incentives, and SSV incentives), and Bitcoin-denominated vaults on Mezo delivering up to 27% APY at current rates. These numbers change. The protocol surfaces them in real time rather than presenting fixed marketing figures.
Points programs operate alongside APY. Mellow points accrue at 0.00025 per hour per dollar deposited. These are separate from APY calculations and disclosed as such — a choice that reflects a broader commitment to transparency in how returns are communicated.
Protocol Governance and Curators
Curators occupy a specific role in the Mellow Protocol architecture. They are not passive index providers. A curator sets strategy parameters, approves underlying protocol integrations, and takes on responsibility for vault risk management. The protocol does not delegate that to an algorithm.
Current curators operating on Mellow Protocol include Lido, Mellow itself, Stakehaus, and Perseus Digital. Each curator manages distinct vaults with distinct risk profiles. The Decentralized Validator Vault, for instance, is curated with a focus on distributed validation infrastructure — a different mandate than the EarnETH vault targeting broad ETH yield.
This model reflects a view that onchain yield should be curated by accountable parties, not purely by code with no human oversight. The protocol provides the infrastructure; curators provide the judgment. Users choose between curators based on track record and strategy fit. That is the governance model in practice.
Growth and Scale
Total value locked across Mellow Protocol vaults currently exceeds $339M. The EarnETH vault alone holds over 110,000 ETH ($250M), making it one of the larger single-strategy ETH vaults operating on Ethereum. The EarnUSD vault holds approximately $7.1M in USDC at a 4.96% APY.
Expansion beyond Ethereum is active. The Mezo BTC vault and Mezo cbBTC vault represent Mellow Protocol's push into Bitcoin-adjacent yield infrastructure. The Rootstock deployment, managed by Tyr Capital, brings vault infrastructure to the RSK sidechain. These are not speculative roadmap items — each is live with deposited capital today.
The protocol launched with a narrow focus, and scale has followed from that focus. Rather than spreading across every chain and asset class simultaneously, Mellow Protocol built depth on Ethereum first, then expanded to adjacent networks where vault infrastructure was absent or underdeveloped.
Where to Go Next
If you want to understand specific vault mechanics, risk disclosures, or how deposits and withdrawals work, the questions page covers those topics in depth. For live vault data and deposit access, the main app shows all active vaults with current TVL, APY, and curator information.
Documentation is available at docs.mellow.finance. Source code is published on GitHub under the mellow-finance organization. The Terms of Service, Privacy Notice, and Risk Disclosure Statement are linked in the footer of the main application.