What Is Suilend? Sui Lending Protocol & SEND Token Guide 2026

Suilend, the Lending Engine That Pushed Sui Past One Billion in TVL

Sui spent most of its first eighteen months as the Move chain that everyone watched and few used. Then a lending protocol called Suilend launched in March 2024, and by early 2025 it had crossed one billion dollars in total value locked, dragging the entire Sui DeFi ecosystem into relevance along the way. Today Suilend is the largest money market on Sui and the home of one of the most discussed token launches of the cycle.

This guide unpacks the protocol from first principles. We will cover what Suilend does, who built it, how the mdrop mechanism reinvented the airdrop, why isolated lending pools matter, and how Suilend stitched together lending, liquid staking through SpringSui, and integrated swaps into a single Sui dApp. We will compare it to Scallop, Navi Protocol, and Aave with real numbers.

By the end you should be able to deposit collateral, borrow stablecoins, leverage staked SUI, manage liquidation risk, and understand what the SEND token does inside the upcoming SEND DAO. We will also be honest about the risks, because every lending protocol has them.

Suilend in Sixty Seconds

That paragraph is the pitch. The rest is proof, mechanics, and walkthrough.

Origin Story, From Solend to Save to Suilend

To understand Suilend you have to understand Save, and to understand Save you have to remember Solend. Solend launched on Solana in August 2021 as one of the first major money markets on the chain, rode the 2021 bull run, and weathered the 2022 collapse better than most. In 2024 the team rebranded to Save and started building a multichain lending stack. Sui was the second deployment, branded Suilend, and it inherited Save's audited code, oracle infrastructure, and risk engineering.

This matters because Sui DeFi in early 2024 was a graveyard of forks and unaudited Move experiments. Suilend arrived with a team that had already shipped a billion dollar money market on another chain, raised six million dollars from Lightspeed Venture Partners, Polychain Capital, and a handful of other tier one funds, and knew exactly how to model collateral risk. The result was immediate trust capital that no native Sui project could replicate.

The March 2024 launch was deliberately quiet. No token, no farming incentives, just deposits and borrows priced by an interest rate curve. By summer 2024 Suilend had already pulled past Scallop, the incumbent native Sui lender, in total deposits. By December, when SEND finally arrived, the protocol was sitting on more than seven hundred million in TVL and a community that had been farming points for nine months. The mdrop distribution converted that latent loyalty into one of the cleanest token launches of the year.

If you are new to Sui itself, the chain was launched in 2023 by Mysten Labs, founded by former engineers from Meta's Diem and Novi projects. Sui uses Move, an object centric data model, and parallel execution. See our guide to the Sui network and Move L1 and a separate Sui blockchain breakdown. Suilend would not exist without those primitives.

How Suilend Actually Works

At its core Suilend is an overcollateralized money market. You deposit an asset, the protocol mints you an interest bearing receipt token, and you can borrow other assets against that collateral up to a loan to value ratio set per asset by the risk team. If the value of your collateral falls or your borrow grows past a liquidation threshold, anyone can repay part of your debt in exchange for a discounted slice of your collateral. The mechanics are familiar to any Aave or Compound user.

What makes Suilend different lives in three architectural choices: isolated pools, integrated peripherals, and oracle design. Each one deserves its own section.

Isolated Lending Pools

Aave V2 and V3 use a main pool model. Every asset in the same pool shares risk with every other asset. If a long tail token gets attacked or its oracle breaks, the bad debt can spill into the main pool and threaten depositors of unrelated assets. Aave mitigates this with isolation mode and efficiency mode flags, but the default is shared risk.

Suilend inverted the default. Each market on Suilend is an isolated pool. The main market holds the blue chips, SUI, USDC, USDT, wETH, and walUSDC, all with conservative loan to value caps. A separate isolated market hosts riskier assets, like long tail Sui native tokens or experimental liquid staking derivatives. If something blows up in the isolated market, the damage is ring fenced. Depositors in the main market are not exposed.

This is the same lesson Compound learned the hard way with their COMP token incident and the same one Euler Finance learned at much greater cost. Isolated pools are slightly less capital efficient because you cannot collateralize across markets, but the risk reduction is dramatic. For a lending protocol on a young chain, where new oracle integrations and new token contracts ship every week, isolation is the only sane default.

Integrated Peripherals, Swaps and Liquid Staking

Most lending protocols live in isolation. You deposit, you borrow, you leave to do anything else. Suilend collapsed that workflow by integrating two adjacent products directly into the lending dApp. The first is a built in swap aggregator. If you want to deposit USDC but you hold SUI, you do not need to bounce to a DEX. Suilend routes the swap through Cetus, Aftermath, and other Sui DEX liquidity, lands you in USDC, and deposits in the same transaction.

The second integration is SpringSui, the team's own liquid staking protocol. SUI holders can stake their tokens with SpringSui to receive sSUI, a yield bearing liquid staking token that compounds the validator rewards. That sSUI is accepted as collateral on Suilend, which means you can stake SUI, earn the seven to nine percent staking yield, and borrow stablecoins against the staked position without unbonding. This is the same pattern that made Lido and rETH so dominant on Ethereum.

If you want to compare the design philosophy with another well known liquid staking pair, look at Rocket Pool and rETH. The architectural lesson is the same: when liquid staking and lending live in the same ecosystem and trust each other's tokens, capital efficiency goes vertical.

Oracle Design

Every lending protocol depends on accurate price feeds. Get the oracle wrong and your liquidation engine misfires, either liquidating users who should be safe or letting underwater positions accumulate bad debt. Suilend uses a combination of Pyth Network pull oracles for low latency price updates and Switchboard as a secondary feed, with internal sanity checks that block updates if the two sources diverge beyond a threshold.

Pyth is particularly important on Sui because it publishes prices at a sub second cadence sourced from major market makers and exchanges. For liquidation accuracy on a fast moving asset like SUI itself, that latency matters. The combination of two independent oracles plus protocol level validation is the standard that any serious money market should meet. Suilend meets it.

The mdrop Mechanism, A Better Way to Launch a Token

Most DeFi protocols launch tokens with a snapshot airdrop. Pick a date, scan eligible wallets, distribute tokens, watch most recipients dump on day one. The mechanism is well understood and badly broken. By the time the token is liquid, the people who built the community have been diluted by mercenary farmers who arrived a week before the snapshot.

Suilend launched SEND in December 2024 with a different mechanism it branded the mdrop. Instead of a single snapshot, the protocol had spent nine months awarding points to depositors and borrowers, weighted by asset, duration, and risk taken. When the token launched, those points converted to SEND on a sliding curve that rewarded early loyal users more than late stage farmers. There was no team unlock cliff that dumped immediately, no private sale tokens hitting the market in the first quarter, and no separate insider allocation that surprised the community.

The numbers spoke for themselves. SEND traded at a strong premium for weeks after launch, the protocol retained most of its deposits through the unlock period (the inverse of what happens in most farm and dump launches), and the mdrop format has since been copied by several other Sui ecosystem projects. The lesson is simple. Token distributions that reward duration outperform token distributions that reward timing.

SEND Token, Utility and the Upcoming DAO

SEND launched as a utility and governance token. Today it does several things at once. Holders can stake SEND to receive a share of protocol revenue, which comes from the spread between borrow and lend rates plus liquidation penalties. Holders can also boost their deposit and borrow rewards, similar to the Curve veCRV model but with a lighter touch. Finally, SEND will gate participation in the upcoming SEND DAO, the governance body that will steer risk parameters, asset listings, and revenue distribution.

The DAO has not gone fully live as of this writing. The roadmap published by the team points to a phased rollout where DAO controlled treasury operations and parameter votes activate after the initial token distribution period ends and circulating supply stabilizes. This phased approach has become best practice in DeFi governance. Curve, Aave, and Compound all moved through similar stages before handing meaningful control to token holders.

SEND is not a stablecoin and it is not pegged to anything. Its price floats. If you want exposure to dollar denominated assets through Suilend, you should hold USDT, USDC, or walUSDC inside the protocol, not SEND. Confusing the two is the most common mistake new users make.

How to Lend and Borrow on Suilend, Step by Step

Time to walk through the actual user flow. You will need a Sui wallet (Sui Wallet, Suiet, or Phantom with Sui support), a small amount of SUI for gas, and the asset you intend to deposit. The protocol UI is at suilend.fi.

A few practical notes. Start small. The first time you interact with any new protocol you should move enough capital to learn the UI, but not enough that a mistake hurts. Even with the best UX, lending positions need active monitoring. SUI is volatile. A twenty percent move can liquidate a thinly hedged position in minutes.

Once you are comfortable, the more advanced workflow is the looping or recursive borrow strategy. Deposit SUI, borrow USDC against it, swap USDC back to SUI, deposit again, repeat. This is how leveraged staking yield is constructed. The math works only if the staking yield exceeds the USDC borrow rate by a comfortable margin and SUI does not crash mid loop. We will not walk through every iteration here, but the pattern is identical to the one we covered in our Aave lending and borrowing tutorial. The same risks apply.

Suilend versus Scallop versus Navi Protocol

Sui has three serious lending protocols. Each took a different path. Suilend is the late mover that imported proven design from Solana. Scallop is the native Sui pioneer that launched first and stayed conservative. Navi Protocol is the newer entrant that bet on a more aggressive listing strategy and integrated yield products. A user choosing where to deposit should understand the tradeoffs.

Scallop launched first and earned a reputation for conservative risk management. Its main weakness was speed of asset listings. New tokens often had to wait months for Scallop integration, which pushed yield seekers elsewhere. Navi Protocol moved faster on listings but at the cost of taking risks Suilend would not accept. Suilend threaded the needle by isolating risky markets while keeping the main market disciplined, and the TVL numbers reflect that.

If you want to read about the chain Suilend sits on top of versus its main Move alternative, our Aptos versus Sui Move L1 comparison covers the technical differences between the two Move chains and why Sui has pulled ahead in DeFi adoption.

Suilend versus Aave, a Cross Chain Look

The natural comparison off Sui is Aave. Aave is the largest lending protocol on Ethereum and across EVM, with more than ten billion dollars in TVL across Ethereum mainnet, Polygon, Arbitrum, Base, Optimism, and Avalanche. Suilend is the largest on Sui but its TVL is roughly one tenth of Aave's. The honest comparison is not size but design philosophy.

Aave's strengths are battle tested code, deep liquidity, governance maturity, and a massive supplier base. Its weaknesses are slow listings, EVM gas costs (especially on Ethereum mainnet), and a default risk model that ties unrelated assets together. Suilend's strengths are sub second finality on Sui, near zero transaction fees, isolated pool defaults, and integrated peripherals. Its weaknesses are youth and a much smaller pool of liquidations and bad debt scenarios to learn from.

For deep dives into the EVM benchmark, see our Aave protocol guide. Both protocols are worth knowing if you operate across chains, because they represent two valid answers to the same question of how to run a money market safely.

SpringSui, the Liquid Staking Half of the Story

Suilend's reach extends past lending because the team also runs SpringSui. SpringSui is a liquid staking protocol for SUI. Users stake their SUI through SpringSui, get sSUI in return (the liquid staking token), and the underlying SUI is delegated across a curated validator set. The validator rewards accrue to the sSUI exchange rate, which means one sSUI is worth slightly more SUI every epoch.

Two things make SpringSui interesting beyond just being yet another LST. First, the validator set is curated for performance and decentralization, not picked for delegated cash kickbacks. Second, sSUI is accepted as collateral on Suilend with a high loan to value ratio, which makes the loop staking strategy viable. You stake SUI, get sSUI, deposit sSUI as collateral, borrow USDC, swap to SUI, stake again, repeat. The capital efficiency is what drove a chunk of Suilend's TVL growth in late 2024 and early 2025.

For the broader context of liquid staking as a category, our piece on Rocket Pool and rETH covers the canonical Ethereum example. The mechanics are different in detail (SpringSui delegates SUI, Rocket Pool delegates ETH through node operators) but the financial primitive is the same.

Risks You Need to Take Seriously

No lending protocol is risk free. Suilend has been audited, has survived almost two years of mainnet operation without a major exploit, and has a strong risk team behind it. None of that eliminates risk. Here are the categories that matter and how to think about each.

Smart Contract Risk

Every line of Move code in the Suilend protocol is a potential bug. The codebase has been audited by reputable firms and the team behind it shipped Save and Solend without a catastrophic exploit, but black swan smart contract failures have hit even Aave and Compound forks in the past. The mitigation is to use only a portion of your capital, never bet the farm, and watch the official communication channels for any pause or upgrade.

Oracle Risk

Suilend uses Pyth and Switchboard with cross checks. The combination is among the strongest in DeFi. But oracles can still misfire. A Pyth glitch that briefly reports SUI at half its market price could trigger a wave of unjust liquidations before circuit breakers engage. The mitigation is to leave a generous buffer in your health factor, not the bare minimum. A health factor of 1.05 will be liquidated on any oracle hiccup. A health factor of 2.0 has room to absorb a transient bad print.

Liquidation Risk

This is the risk most users underestimate. The borrow side of any lending position is short volatility. If your collateral drops or your borrow asset rises, your loan to value moves toward the liquidation threshold. Once you cross it, liquidators repay your debt for a discount, taking your collateral. On Sui, where price feeds update in sub second cadence and transactions confirm in roughly half a second, liquidations can happen faster than a user can react. Set conservative limits, use position monitoring tools, and consider exiting before crossing major support levels rather than after. Our explainer on liquidation zones in crypto walks through how to map them out.

Sui Chain Risk

Suilend lives on Sui. If Sui goes down, Suilend goes down. Sui has been operationally reliable since launch but has had brief outages, like every young chain. Diversifying across chains is one mitigation. Keeping a portion of your stack in Ethereum based DeFi primitives is another. There is no perfect hedge, only spread risk.

Governance and Token Risk

SEND is a young token. Its market cap and trading volume are not yet large enough to absorb major sells without price impact. If a large early holder decides to exit, the price impact can be severe. The mdrop mechanism mitigated this at launch but has not eliminated the structural reality that every emerging token has a few wallets that hold a disproportionate share.

Use Cases, From Conservative to Spicy

The conservative end of the spectrum is simple yield generation. Deposit USDC, USDT, or walUSDC into the main market, earn the supply rate, never borrow. You get exposure to the protocol's organic yield (currently mid single digits depending on the asset) plus SEND incentives. The risk surface is smart contract risk only.

A middle ground is collateralized stablecoin borrowing. Deposit SUI or sSUI, borrow USDC, use it to off ramp to fiat, deploy into other DeFi, or hedge a position. You retain SUI exposure and gain liquidity without selling. In many jurisdictions borrowing is not a taxable event, while selling is.

The spicy end is leveraged staking through looping. Maximum capital efficiency, maximum exposure to SUI. Reserved for users who understand how the math falls apart in a fast drawdown. Finally, Suilend is a yield source for treasury and DAO operations. Several Sui ecosystem DAOs park idle treasury in Suilend's main market because the yield is competitive and the position can be wound down in a single transaction.

The Sui DeFi Stack, Where Suilend Fits

Suilend is the largest piece of a broader Sui DeFi stack that has matured rapidly through 2025. To understand the protocol's strategic position you need to see the layers around it. At the base is Sui itself, the L1 (covered in detail in our Sui network deep dive). On top of Sui sit the DEXes (Cetus, Aftermath, Turbos), the lending protocols (Suilend, Scallop, Navi), the liquid staking primitives (SpringSui, Volo, AlphaFi), the perpetuals platforms, and adjacent storage and indexing layers like Walrus.

If you want to go deeper on the storage layer that some Sui projects use for permanent file hosting, see our Walrus protocol guide. It is built by the same Mysten Labs team that built Sui itself and integrates natively with Sui smart contracts.

Suilend sits at the center of this stack because lending is the connective tissue that lets every other primitive compose. A DEX is worth more when traders can borrow inventory cheaply. A liquid staking token is worth more when it can serve as collateral. A treasury management strategy is worth more when idle stablecoins earn safely. Suilend touches all three, which is why its TVL growth has correlated tightly with Sui's overall DeFi growth.

How to Think About SEND Long Term

SEND is a bet on the long term growth of Suilend's revenue and the eventual handoff of meaningful control to the DAO. The token captures value in three ways. Staked SEND earns a share of protocol fees, which scale with TVL and utilization. Boost mechanics allow SEND holders to amplify their own deposit and borrow rewards. Governance over treasury and parameter votes means SEND holders can direct future product investment.

The bear case is straightforward. If Sui DeFi growth stalls, if a competitor takes share, or if the protocol suffers an exploit, the token will be hit. The bull case is that Sui continues to outgrow most other L1s, Suilend defends its number one position, and the DAO matures into a serious revenue distributor over the next two cycles. The DAO rollout itself will tell you a lot about the team's discipline. Curve, Aave, and Compound all went through similar phases.

Practical Tips Before You Deposit

One more thing that beginners miss. Suilend's UI shows a max borrow number based on your collateral and the protocol's risk parameters. Do not borrow your max. Ever. Treat the max as a hard ceiling and operate well below it. The further you are from liquidation, the more volatility you can absorb without panic. Borrowing fifty to sixty percent of the maximum is a sane starting point. Above seventy percent you are taking on serious tail risk for a marginal yield gain.

Ecosystem Integrations You Should Know

Suilend is not just a destination, it is a building block. Aggregators route lending and borrowing through Suilend as part of multi step strategies. Yield optimizers automate the loop staking process on top of Suilend rails. Wallet UIs surface Suilend yields as a one click deposit option. By early 2025 Suilend was integrated with most of the top twenty Sui dApps in some form, which is a fast pace by any standard.

If you are exploring Sui DeFi for the first time, our DeFi guide covers the entire category, and the how do cryptocurrencies work guide is a useful low level primer. Lending protocols are advanced. Make sure the basics are solid first.

Looking Ahead, What to Watch in 2026

Several catalysts will shape Suilend's trajectory through 2026. The first is SEND DAO activation. Once governance moves from team controlled to token controlled, the cadence of asset listings and risk parameter changes will shift. A well executed transition could unlock real value capture for SEND holders. A botched one could fragment community trust.

The second is multichain expansion under the broader Save umbrella. If a sister deployment launches on additional Move chains, the playbook could replicate quickly. The third is competition. Aave has not yet deployed on Sui but the Sui foundation is actively recruiting major DeFi protocols. If a well known EVM lender lands on Sui, the landscape shifts, and Suilend's incumbency, isolated pool design, and SEND incentives become its defense.

Frequently Asked Questions

Conclusion, Where Suilend Fits in Your DeFi Stack

Suilend is the most consequential protocol on Sui by any measure that matters. It crossed one billion in TVL faster than any other Sui dApp, it pioneered a token launch mechanism that other projects have copied, it ships isolated pools as the default rather than the exception, and it owns the liquid staking layer that pairs with its lending markets. The team has shipped lending protocols for half a decade across two ecosystems and is one of the most experienced groups in DeFi.

For users, the practical recommendation is this. If you hold SUI, sSUI, USDC, USDT, walUSDC, or wETH and you want to earn yield or unlock liquidity without selling, Suilend is the default venue on Sui. Start with a small position in the main market, get comfortable with the UI and the health factor, then scale up as your understanding deepens. Resist the temptation to lean into looping and leverage until you have weathered at least one volatile week as a depositor. If you want a token bet on the protocol's future, SEND is the vehicle, with the understanding that emerging token risk applies.

The bigger picture is that lending protocols are the connective tissue of every DeFi ecosystem. Without a strong lender, DEXes lack inventory financing, liquid staking tokens lack utility, and treasuries lack a yield destination. Sui needed a great lending protocol to become a great DeFi chain. Suilend filled that gap. The chain and the protocol have grown together, and the next two years will tell us whether that growth was a cycle peak or the start of a new compounding curve. If you want to track the broader chain context that frames Suilend's story, our Ethereum beginner guide offers a useful comparison for how DeFi ecosystems mature over time. The lessons from one chain reliably echo on the next.

Open suilend.fi, connect a Sui wallet, deposit a small amount, and you will learn more in a week than any guide can teach. The best way to understand a money market is to use one.