Solend Crypto Explained: How the Solana-Based Lending…

KEY TAKEAWAYS

1. Solend, which rebranded as Save in July 2024, is a decentralized lending protocol on Solana that launched in 2021 and saw its total value locked peak near $1 billion before the 2022 FTX collapse.
2. Users deposit assets into liquidity pools and receive tokenized receipts representing their deposits and accruing interest, while borrowers must over-collateralize positions according to the applicable collateral requirements.
3. A June 2022 governance crisis erupted when one whale wallet controlled approximately 95% of the protocol's SOL deposits, prompting a controversial vote to take control of the account.
4. Save (formerly Solend) offers lending and borrowing on Solana, where transaction fees are generally low. Aave supports multiple blockchains, and Ethereum mainnet fees have fallen substantially from the $20 to $50 levels seen during peak congestion in 2021–2022.
5. Smart contract vulnerabilities, oracle pricing failures, and liquidation cascades remain risks, despite security audits from Kudelski Security and Neodyme.

Decentralized lending on Solana benefits from fast transactions and generally low fees. Solend, which rebranded as Save in July 2024, is one of the earliest lending protocols built natively on the network. Save continues the project's lending and borrowing services under its updated brand.The protocol lets users earn interest by depositing assets into liquidity pools and borrow against their holdings with over-collateralized positions. Solana's total lending market reached $4.8 billion in early 2025, reflecting a 33% surge during broader market volatility. This article covers how Solend's lending mechanics work, what risks the protocol carries, and how its design differs from Aave's multi-chain approach.

How Solend's Lending and Borrowing Mechanics Work

Save (formerly Solend) matches lenders and borrowers through smart contracts that eliminate the need for a central intermediary. Users deposit assets into supported liquidity pools and receive cTokens in return. These tokenized receipts represent their deposits and accrue value as borrowers pay interest determined by the protocol's algorithmic rate model.Save uses an algorithmic interest rate model that adjusts borrowing costs according to pool utilization. When borrowing demand rises, interest rates can increase to encourage additional deposits. Rates vary by asset, pool and market conditions.Borrowers must over-collateralize their positions before accessing funds. Borrowers must maintain sufficient collateral to support their loans, with collateral requirements, borrowing limits and liquidation thresholds varying by asset and pool.All loans on Save (formerly Solend) are open-ended, with no fixed repayment schedule. Borrowers can repay their loans at any time, while interest accrues over the life of the loan. Solana transactions generally have low network fees, although actual costs vary by transaction and network conditions.

The 2022 Governance Crisis and Its Aftermath

Save, then known as Solend, faced a major governance crisis in June 2022 when a single whale wallet deposited roughly $170 million worth of SOL as collateral. That position represented approximately 95% of the protocol's total SOL deposits and 88% of its USDC borrows, Blockworks reported.The protocol's team proposed a governance vote to take emergency control of the whale's account. The plan would have allowed Solend Labs to execute an over-the-counter liquidation if SOL fell below $22.30. A forced on-chain liquidation of that size risked creating cascading sell pressure across Solana's decentralized exchange liquidity.The first vote passed with over 1.15 million votes in favor, representing 97.5% of participating tokens. However, a single account cast more than 1 million of those votes, drawing immediate criticism from DeFi observers. Critics described the protocol as "a DAO in name only" and questioned whether the governance process was genuinely decentralized.A second governance proposal reversed the first, extending voting periods from six hours to a full day. The team pledged to develop a new framework without emergency account seizure powers. Withdrawals spiked during the crisis, pushing USDC and USDT pool utilization to 100% and temporarily blocking remaining depositors from accessing their funds.

How Solend Compares to Aave Across Key Metrics

Save (formerly Solend) and Aave serve the same fundamental purpose but differ in scope and architecture. Save operates on Solana, while Aave supports lending markets across multiple blockchains, including Ethereum, Polygon, Arbitrum and Avalanche.Transaction costs represent one difference between the two protocols. Transactions on Solana generally incur low network fees, often below $0.01, although costs vary. Aave transactions on Ethereum mainnet cost $20 to $50 at peak congestion during 2021–2022, but Ethereum transaction fees have since fallen substantially and were below $1 for much of 2025. Aave's Layer 2 deployments can offer lower transaction costs than the Ethereum mainnet.Aave's lending infrastructure includes flash loans, which allow users to borrow and repay assets within a single transaction. Aave also has a longer operating history and a larger lending ecosystem, although liquidity and concentration risk vary by market and asset.Both protocols use algorithmic interest rate models that adjust with utilization. Save's reported Q1 2025 figures showed approximately $313 million supplied and $80 million borrowed. Aave's total value locked exceeded $40 billion in May 2025 and reached approximately $44.8 billion in October 2025, reflecting its broader multi-chain deployment.

Risk Factors Every User Should Evaluate

Smart contract risk remains the primary technical concern for any DeFi lending protocol. Solend has completed security audits from Kudelski Security and Neodyme, but audits reduce rather than eliminate vulnerability exposure. No insurance mechanism exists within the protocol to cover losses from potential exploits.Oracle risk presents another layer of exposure. Solend relies on external price feeds to determine collateral values and trigger liquidations. If those oracles deliver inaccurate price data during periods of extreme volatility, positions may face unnecessary liquidation or fail to liquidate when they should.The 2022 whale crisis demonstrated how concentrated deposits can create risks for a lending protocol. A single large depositor controlled enough of the pool to affect other users' access to liquidity.Regulatory uncertainty adds a longer-term risk dimension. The legal status of DeFi governance tokens under US securities law remains unsettled, and regulatory developments could affect participation in governance or access to lending services.

What's Next?

Solana's lending market continues to attract new protocols including Kamino, Drift, and Jupiter Lend, intensifying competition for deposits and borrowers. Solend's ability to retain market share depends on whether its governance reforms and asset expansion keep pace with alternatives offering deeper liquidity and broader chain coverage.

FAQs

What is Solend and which blockchain network does it operate on for decentralized lending? Solend is a decentralized lending protocol built on Solana that lets users deposit crypto to earn interest and borrow against collateral.How do interest rates on Solend compare to rates offered by traditional savings accounts? Interest rates on Save (formerly Solend) vary by asset, pool and market conditions. Unlike traditional savings accounts, DeFi lending yields are not fixed and may change as borrowing demand and pool utilization fluctuate.What happened during the Solend governance crisis involving the large whale wallet position? A whale deposited $170 million in SOL as collateral, and the team proposed seizing the account, triggering backlash and governance reforms.How does Solend's transaction cost structure compare with Aave on the Ethereum blockchain network? Save (formerly Solend) transactions on Solana generally incur low network fees, often below $0.01, although actual costs vary. Aave's Ethereum mainnet transaction fees fluctuate with network demand and have fallen substantially from the $20 to $50 levels seen during peak congestion in 2021–2022. What security audits has Solend completed to protect user funds deposited into its lending pools? Kudelski Security and Neodyme conducted security audits of Solend's smart contracts, though audits reduce rather than eliminate exploit vulnerability risks entirely.Can users earn governance tokens by depositing and borrowing assets through the Solend lending protocol? Rewards depend on the protocol's current incentive programs and the pools eligible to participate. Users should check Save's official interface for available incentives and their eligibility requirements. What collateral ratios does Solend require for borrowing against major assets like SOL and ETH? Collateral requirements and liquidation thresholds vary by asset and pool. Users should check Solend's current market parameters before borrowing, as these settings determine how much they can borrow and when their positions may be liquidated.

References

1. SwissBorg Academy: Solend Decentralised Lending on Solana
2. Blockworks: Solana Lending Protocol Faces Governance Conundrum
3. Best Crypto Lending: Solend Review 2025
4. Yahoo Finance: Solana Lending Soars 33% to $4.8B