Fluid

Fluid is a DeFi infrastructure protocol that consolidates lending, borrowing, and decentralized exchange functionality into a single shared capital base called the Unified Liquidity Layer. Originally launched in 2018 as Instadapp—a middleware aggregator for protocols like MakerDAO, Aave, and Compound—the project pivoted to building its own protocol stack and rebranded to Fluid in December 2024 following the breakout success of its DEX launch. The protocol is built by brothers Samyak Jain and Sowmay Jain, who started the project at ETHIndia Hackathon 2018 and grew it into one of Ethereum's most capital-efficient DeFi systems before expanding to Solana.

Core Architecture

The defining feature of Fluid is its Unified Liquidity Layer: a central contract that holds all protocol funds and routes them across multiple specialized applications simultaneously. Rather than fragmenting capital across isolated lending pools and separate DEX liquidity, Fluid's architecture allows the same deposited assets to serve borrowers in vaults, earn yield in lending markets, and provide liquidity for trading—all at once.

Three factory contracts sit atop this liquidity layer:

• LendingFactory deploys fTokens, which are ERC4626-compliant yield-bearing tokens representing deposits in the lending protocol. Depositors earn yield automatically as borrowing demand fills.
• VaultFactory creates vault instances for advanced borrowing. Users lock collateral and borrow against it at loan-to-value ratios up to 95%, among the highest in DeFi. This efficiency comes from Fluid's liquidation engine, which is designed for precision rather than brute-force penalties.
• DexFactory establishes DEX pools that sit directly atop the liquidity layer, enabling two distinguishing features: Smart Collateral (using LP positions as borrowing collateral) and Smart Debt (carrying borrowed positions that simultaneously generate LP fee revenue).

A stETH Protocol module provides a specialized path for users to unwind leveraged stETH positions at a 1:1 rate with Lido, reducing deleveraging costs by roughly 10x compared to market-rate alternatives.

Growth and Market Performance

Fluid's DEX v1 launched in October 2024 and achieved rapid adoption without token incentives. Within months it surpassed Uniswap's ETH/USDC pool in volume—generating $10 billion in cumulative volume within its first 100 days and doing so with only $6 million in TVL at the time. For the full year 2025, Fluid processed $156.45 billion in DEX volume on Ethereum, finishing as the second-largest Ethereum DEX by volume. Its lending protocol held over $5 billion in deposits by the same period, with USDC and USDT supply APYs in the 4–5.5% range as of mid-2026.

In April 2025, Fluid launched DEX v2, a permissionless framework allowing external developers to deploy custom DEX instances on top of the shared liquidity layer.

Solana Deployment: Jupiter Lend

Fluid's entry onto Solana came through a partnership with Jupiter, the dominant Solana DEX aggregator and DeFi superapp. Jupiter Lend, powered by Fluid's liquidity engine and liquidation architecture, launched in public beta on August 29, 2025—Fluid's first non-EVM deployment. The Solana implementation is built natively and housed in the open fluid-solana-programs repository on GitHub under the Instadapp organization.

The launch exceeded expectations immediately. Jupiter Lend surpassed $500 million in total value locked within its first 24 hours and crossed $1 billion TVL within eight days. By December 2025 it held over $1.5 billion in TVL—approximately 35% of Solana's entire lending market—making it the second-largest Solana money market behind Kamino Finance.

The Solana deployment inherits Fluid's core efficiency advantages. Users can borrow at up to 90% LTV with liquidation penalties as low as 0.1%, substantially below the 5–10% penalties common across most lending protocols. This efficiency reflects Fluid's precision liquidation engine, which uses targeted liquidations rather than large fixed penalties to maintain solvency.

Supported assets at launch included wrapped Bitcoin variants (cbBTC, xBTC, WBTC), liquid staking tokens (JupSOL, JitoSOL), major stablecoins (USDC, USDT, EURC, USDG, USDS, syrupUSDC), Jupiter's JLP token, and the JUP governance token as collateral. JupUSD, Jupiter's native stablecoin, was added as both a collateral and borrowable asset in January 2026.

In August 2026, Fluid expanded the Solana product further with two additions: Smart Vaults (the v2 upgrade to Jupiter Lend), which allow users to simultaneously earn lending interest and DEX trading fees on the same capital, and the launch of Solana DEX v1, bringing the unified liquidity layer natively to the Solana trading environment.

Security and Audits

Fluid carries one of the stronger security records in DeFi by tenure. The Instadapp infrastructure underpinning Fluid operated for over seven years without a loss of user funds before the Fluid rebrand. The core protocol on Ethereum has been audited by PeckShield (pre-launch), StateMind (protocol and liquidity layer updates), MixBytes (vault, DEX, and liquidity layer modules), and Cantina (DEX protocol).

For the Solana deployment specifically, Zenith and Offside Labs completed independent audits before the Jupiter Lend public beta launch, with three additional audits underway at that time ahead of full open-sourcing of the code. Over $2 million in launch incentives accrued from day one across earning and borrowing vaults. All audit reports for the EVM protocol are published publicly through the Fluid documentation portal.

Token

The FLUID token is the protocol's governance and utility token. It has attracted institutional interest: UAE-based asset manager Kinetic Group announced plans to purchase $11.7 million in FLUID on the open market in July 2026, and AppWorks disclosed a strategic investment in the FLUID token the same month.

Solana Ecosystem Fit

Fluid enters Solana not as a standalone protocol but as the backend infrastructure for Jupiter, the ecosystem's most widely used DeFi application. This positioning gives Fluid immediate distribution through Jupiter's user base and swap interface while allowing it to compete directly with Kamino Finance for lending market share. The addition of Smart Vaults in August 2026 introduces a product unavailable elsewhere on Solana: a single position that generates both interest income and trading fee revenue simultaneously.

The broader Fluid roadmap points to cross-chain liquidity consolidation—the same architecture that unified Ethereum's lending and DEX liquidity now running on Solana's faster and lower-cost settlement layer.