Spark Protocol is a lending market deployed by the Sky ecosystem (formerly MakerDAO) using a fork of Aave V3. As of April 2026, Spark holds $6.8B in TVL across Ethereum, Gnosis, and Base — making it the second-largest DeFi lending venue, per DefiLlama's Spark page. The Spark vs Aave comparison is structurally interesting because the two protocols share contract code but diverge sharply on asset listings, rate setting, and governance.
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The short version: Aave is a pure lending protocol governed by the AAVE token; Spark is a Sky-aligned lending market designed to deepen USDS liquidity, distribute the DAI Savings Rate (DSR) onchain, and route Sky-issued credit. Same contracts, different mission.
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Spark launched in May 2023 as part of MakerDAO's Endgame plan. It is a fork of Aave V3 contracts (with a license fee paid to Aave, settled via governance) deployed under Sky's governance and configured for Sky's strategic objectives — primarily, USDS / DAI liquidity expansion and the SparkLend DAI Savings Rate (sDAI) distribution rail.
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The protocol consists of three components:

The spark-protocol GitHub repo contains the deployment configs and divergences from upstream Aave.
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Three differences matter most. First, Spark borrow rates for DAI and USDS track the DSR / SSR. When Sky raises the savings rate to 8%, Spark's USDS borrow rate clears around 8.5–9%; when SSR drops to 5%, Spark borrow drops with it. Aave rates float freely on supply-demand. Second, Spark lists assets primarily for their utility to USDS distribution: ETH, stETH, wstETH, cbBTC, sDAI, and a tightly curated long-tail. Aave V3 lists 30+ assets per chain. Third, Spark deploys and operates the SLL, which bridges USDS and DAI across Spark deployments without user action.
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The most important Spark feature is the Sky Savings Rate (SSR) integration. Sky uses the SSR — a governance-set yield on USDS deposits — as a monetary lever. When Sky wants to attract USDS liquidity, the DAO raises the SSR; when Sky wants to push USDS out into productive deployments, the DAO lowers it.
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Spark distributes the SSR via the sUSDS vault: deposit USDS, get sUSDS, accrue SSR yield. The vault is integrated into SparkLend as collateral, meaning a user can deposit sUSDS, borrow USDS against it, and effectively run a leveraged SSR carry trade. As of April 2026, the SSR is 5.5% per Spark's app, down from a peak of 12% in early 2024.
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This integration is why Spark and Aave produce different rates for the same underlying asset (DAI or USDS). Spark rates anchor to the SSR; Aave rates float.
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The SLL is Spark's cross-chain liquidity rebalancer, built on Chainlink CCIP. It moves DAI / USDS between Spark's Ethereum, Gnosis, and Base deployments to keep utilization roughly even across chains. When borrow demand on Base spikes, the SLL pulls DAI from Ethereum to Base; when Gnosis utilization falls, the SLL pulls liquidity back to Ethereum.
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SLL is governance-controlled and operates on a multi-day cadence — it is not a real-time bridge. Users wanting fast cross-chain liquidity still bridge manually or via aggregators.
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Spark inherits Aave V3's smart-contract risk surface (the contracts are nearly identical) plus Sky governance risk. The Sky DAO controls SparkLend's risk parameters: a captured Sky governance could change LTVs, list malicious assets, or change the SSR adversely.
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The Sky-Aave alignment also creates correlated risk: if either Sky or Aave hits a critical bug, the other may be exposed via the contract code reuse. Both teams audit independently (Sky via ChainSecurity and OpenZeppelin; Aave via Certora and Trail of Bits), and divergences are tracked in the spark-protocol repo, but the shared codebase is structural.
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For the broader risk taxonomy, see the DeFi Lending pillar.
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Use Spark when:

Use Aave V3 when:

Spark and Aave coverage barely overlaps on chains: Spark on Ethereum, Gnosis, and Base; Aave on 15+ EVM chains. A treasury team running positions on both protocols often holds liquidity on chains where one or the other is unavailable. Eco moves stablecoins across 15 supported chains as a single intent — relevant when rebalancing between Spark deployments and Aave deployments, or when sourcing USDS to deposit into Spark from a chain where USDS isn't natively distributed yet. Eco Routes (CLI + API) handles the cross-chain leg in seconds; the SSR / Aave rate decision stays with the user.
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Spark's economic gravity comes from USDS — the rebranded successor to DAI in the Sky ecosystem. USDS launched in September 2024 as part of the Endgame plan. As of April 2026, USDS supply is $7.2B, per Block Analitica's Spark dashboard, with most circulation flowing through Spark deployments and Sky-aligned distribution rails.
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The Sky issuance model:

This integration matters for Spark borrowers because the D3M mechanism means USDS borrow availability on Spark is structurally guaranteed — a borrower can always find USDS at the SSR-anchored rate. On Aave V3, USDS borrow capacity is bounded by what Aave depositors have supplied; spikes in demand can hit caps.
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Spark's listing process is conservative by design. Sky governance only approves assets that fit one of three roles:

The result: Spark has fewer than 15 listed assets across all chains, vs Aave V3's 30+ per major chain. The conservative list is intentional — Sky is optimizing for risk to USDS, not for breadth of borrowing.
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For users, this means Spark is the right venue for ETH-and-BTC collateral plus USDS / DAI borrow, and the wrong venue for long-tail collateral or non-Sky stablecoins. Aave V3 covers what Spark does not.
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Spark's chain footprint is small but strategic. Each deployment exists for a specific reason:

The conspicuous absence: Spark is not yet on Arbitrum, Optimism, or Polygon — chains where Aave V3 has substantial deployments. The Sky DAO has discussed expansion but has prioritized USDS supply growth on existing chains over chain breadth.
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Spark and Aave have a structural relationship that goes beyond contract code reuse. Sky's USDS is listed on Aave V3; Aave's GHO is listed on some Spark deployments. Both protocols benefit from cross-listing — Aave gets USDS borrow demand, Sky gets GHO as collateral diversification. The two governance systems coordinate on listing parameters via the Sky-Aave forum thread that runs continuously.
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For users, this means moving liquidity between Aave and Spark is operationally smooth: the same stablecoin (USDS, DAI, USDC) is supported on both, with similar collateral lists. The decision between them is rate-driven, not asset-availability-driven.
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The broader Sky Endgame plan envisions Spark as one of several "SubDAO" lending venues, with future deployments potentially specialized by collateral type or geography. As of April 2026, only the original SparkLend exists; the SubDAO expansion is on the roadmap but not yet shipped.
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If SubDAOs do ship, expect more Spark-style fork deployments tuned to specific use cases (e.g., a Spark-RWA SubDAO accepting only tokenized Treasuries; a Spark-LST SubDAO specialized in liquid staking tokens). The SubDAO model is conceptually similar to Aave V4's Spoke architecture, achieved via separate deployments rather than via in-protocol vault structure.
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Sky's risk team publishes a Spark risk report monthly via the governance forum. The report covers utilization across markets, current parameters, identified risks, and recommended changes. Reading the most recent report is the fastest way to understand Spark's current state.
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Key sections to focus on:

For depositors and borrowers, the risk reports provide context that the protocol's app dashboard doesn't. A USDS borrow rate of 6% looks different when the report shows D3M was active during the period vs when the rate cleared organically.
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Spark's governance is in transition. The protocol is governed by Sky's MKR token through 2025 and is migrating to the SKY token as part of the Endgame plan. A separate SPK token launch was approved by Sky governance in 2024 to specifically govern Spark-level decisions, with SPK distributing to early Spark users and to participants in Sky's tokenization roadmap. The token transitions are operational details for Spark depositors but matter for anyone holding governance tokens or participating in incentive programs.
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Yes. Spark uses Aave V3 contracts under a Sky governance-approved license. The contract code is nearly identical; configurations, listings, and rate setting differ. See the spark-protocol repo for the divergence set.
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The SSR (formerly DAI Savings Rate, DSR) is a governance-set yield Sky pays on USDS deposits. It is the central monetary lever for USDS supply expansion and contraction. As of April 2026 it sits at 5.5%.
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Spark anchors DAI / USDS borrow rates to the SSR. Aave's rates are set by market supply-demand on a per-asset utilization curve. The two converge only when SSR happens to equal Aave's market-clearing rate — usually it doesn't.
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SparkLend inherits Aave V3's e-mode primitive but Sky configures it conservatively. As of April 2026, e-mode is enabled for ETH-correlated assets at 90% LTV; Aave allows up to 97%. Check Spark's app for current parameters.
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Not directly. The two protocols don't share a liquidity layer; bridging between them requires withdrawing, bridging the asset, and depositing on the other side. Eco's intent-based routing handles the bridge step in seconds across 15 supported chains.
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