The lending protocol of the Sky ecosystem (formerly MakerDAO). Borrow DAI or USDS against wBTC or cbBTC at variable rates anchored to the Maker DSR. Conservative governance, transparent on-chain mechanics, and the familiar wrapped-Bitcoin tradeoff baked in.
Spark launched in 2023 as a subDAO of MakerDAO with a simple mandate: build a dedicated lending venue inside the Maker ecosystem, optimized for DAI borrowing and tightly integrated with the Dai Savings Rate. By 2024, MakerDAO had rebranded the broader ecosystem under the Sky umbrella, introducing the USDS stablecoin (an upgrade path from DAI) and the sUSDS yield-bearing wrapper. Spark continued operating as the lending app, now positioned as the lending arm of Sky.
For a Bitcoin holder, Spark is one of the cleanest DeFi borrowing options. You deposit wBTC or cbBTC as collateral and borrow DAI or USDS at a variable rate that is anchored to the Maker/Sky DSR baseline plus utilization. Because Sky actively manages DSR to balance DAI demand, Spark borrow rates tend to be more stable than pure utilization-driven protocols like Aave, sitting in the 4-9% range most of the time in 2026.
The honest tradeoff: you get MakerDAOs decade-long risk discipline, transparent on-chain governance, and a battle-tested stablecoin as your borrow asset. You also inherit the wrapped-Bitcoin trust assumption (BitGo for wBTC, Coinbase for cbBTC), instant on-chain liquidations with no grace period, and Sky governance risk because parameters can change via on-chain votes.
| Category | Score | Notes |
|---|---|---|
| Custody model | 7/10 | Fully on-chain self-custody but collateral is wrapped (wBTC or cbBTC), so you inherit the underlying custodian risk |
| Transparency | 9/10 | All contracts and parameters publicly visible; Sky governance votes are on-chain and well documented |
| Rate structure | 7/10 | Variable 4-9% anchored to Maker/Sky DSR; more stable than pure utilization but still floating |
| Liquidation risk | 6/10 | ~75-80% liquidation threshold with instant on-chain liquidations; no margin-call grace period |
| Governance | 7/10 | Maker/Sky governance is among the most conservative in DeFi but can change parameters via on-chain votes |
| Overall | 7/10 | Conservative MakerDAO/Sky risk discipline, transparent governance, anchored rates, with wrapped-Bitcoin trust and thinner liquidity than Aave |
| Parameter | Details |
|---|---|
| APR | Variable, typically 4-9% on DAI or USDS |
| Minimum loan | No fixed minimum; constrained by gas economics |
| Maximum loan | Constrained by collateral and market liquidity |
| Max LTV (practical) | ~70% (with safety margin) |
| Liquidation threshold | ~75-80% for wBTC, set by Sky governance |
| Liquidation penalty | Around 5% to the liquidator |
| Liquidation model | On-chain instant liquidation by Spark/Sky bots |
| Collateral assets | wBTC, cbBTC (chain-dependent) |
| Loan assets | DAI or USDS (sUSDS for yield-bearing) |
| Rate model | Maker/Sky DSR baseline + utilization curve |
| Origination fee | No |
| Prepayment penalty | No |
| KYC required | No (permissionless on-chain) |
| Frontend availability | Geo-screening on app.spark.fi may apply |
| Parent ecosystem | Sky (formerly MakerDAO) |
| Launched | 2023 as MakerDAO subDAO, continued under Sky 2024 |
In 2024 MakerDAO completed a major restructuring it called Endgame, rebranding the umbrella organization as Sky and introducing two new tokens alongside the existing DAI and MKR. USDS launched as an upgrade path from DAI with cleaner mechanics and built-in support for the savings layer. sUSDS is the yield-bearing wrapper: hold sUSDS and it accrues the DSR yield automatically.
For a Spark borrower, the practical impact is choice. You can still borrow DAI, which remains fully supported and is still the most widely integrated decentralized stablecoin in DeFi. You can also borrow USDS or sUSDS if you prefer the new versions. DAI and USDS are interchangeable 1:1 through the Sky Peg Stability Module, so the choice is mostly preference: DAI for universal liquidity, USDS for alignment with the new Sky brand and tooling.
The rebrand has created ongoing UX confusion. Documentation, governance forums, and frontends frequently mix the old (Maker, DAI) and new (Sky, USDS, sUSDS) terminology. The MKR token still exists for governance but is being progressively migrated to the new SKY token via a 1:24,000 conversion. None of this changes the underlying credit mechanics of Spark, but it does mean borrowers should pay attention to which token they are actually borrowing.
Spark, like Aave and almost every other major Ethereum-based DeFi lending protocol, cannot directly accept native Bitcoin as collateral. Bitcoin and Ethereum are separate networks. To use BTC on Spark you must first convert it to a wrapped representation: wBTC (issued by BitGo and the WBTC merchant consortium) or cbBTC (issued by Coinbase on Base and Ethereum). Both are 1:1 redeemable against native BTC held in custody.
The trust assumption is unavoidable for this architecture. If BitGo or Coinbase failed, suffered a custodian breach, or was hit with a court-ordered freeze, the wrapped token could depeg. The 2024 governance dispute around proposed wBTC custody changes made this risk newly visible and was a major catalyst for the broader push toward cbBTC and other alternatives. Spark mitigates risk by supporting multiple wrapped Bitcoin options and by actively monitoring custody attestations.
For borrowers who want to eliminate wrapped-Bitcoin risk entirely, the only real options in 2026 are non-custodial Taproot vault protocols like Surge Credit and Lava, or multisig escrow setups like Hodl Hodl/Debifi. These let you borrow against native BTC without ever wrapping it. They trade off DeFi composability and access to DAI/USDS for a cleaner trust model.
Four credible options for borrowing against Bitcoin in 2026, each with a different combination of collateral model, governance, rate structure, and liquidity profile.
| Parameter | Spark | Aave (wBTC) | Coinbase | Surge Credit |
|---|---|---|---|---|
| APR structure | Variable, 4-9% (DSR-anchored) | Variable, utilization-driven | Variable, 5-10% | Variable, market-set |
| Collateral | wBTC or cbBTC (wrapped) | wBTC (wrapped) | cbBTC (wrapped) | Native BTC (Taproot vault) |
| Max LTV | ~70% practical | ~73% | ~86% | ~50% |
| Liquidation grace | No (instant on-chain) | No (instant on-chain) | No (instant on-chain) | No (on-chain script) |
| Origination fee | No | No | No | No |
| KYC | No | No | Yes | No |
| Self-custody | Yes (your wallet) | Yes (your wallet) | No (cbBTC in Coinbase) | Yes (Taproot vault) |
Spark wins on rate stability (DSR anchor) and governance discipline. Aave wins on wBTC liquidity depth and ecosystem reach. Coinbase wins on mainstream UX and the highest LTV ceiling. Surge Credit wins on native-Bitcoin collateral with no wrapping layer at all. For most retail-sized DAI borrows, Spark is the natural choice; for very large size, Aave; for highest leverage, Coinbase; for zero wrapping risk, Surge Credit.
Spark earns 7/10. It is one of the most conservatively governed DeFi lending venues available in 2026, inheriting MakerDAOs decade-long risk discipline and anchoring its borrow rates to the well-managed Dai Savings Rate. For a DeFi user who wants to borrow DAI or USDS against Bitcoin without learning a new governance system, Spark is the natural home.
What holds it back from 8: wrapped-Bitcoin trust (wBTC and cbBTC) is structural and unavoidable for any Ethereum-based lender; liquidity on Sparks wBTC market is thinner than Aaves; the ongoing Sky rebrand creates UX confusion across docs, forums, and frontends; and Sky governance retains the ability to change parameters going forward.
For DeFi-native borrowers wanting DAI exposure with conservative parameters, Spark is the right pick. For deeper liquidity, see Aave. For higher LTV with mainstream UX, see Coinbase Loans. For zero wrapped-Bitcoin trust, see Surge Credit or Lava.
Connect a wallet, deposit wBTC or cbBTC, borrow DAI or USDS. No KYC, no origination fees, only Ethereum gas.
Spark is a DeFi lending protocol that launched as a subDAO of MakerDAO in 2023. In 2024 MakerDAO rebranded the broader ecosystem under the Sky umbrella, introducing the Sky brand, the USDS stablecoin (an upgrade path from DAI), and the sUSDS yield-bearing wrapper. Spark continued operating as the lending venue inside that ecosystem. The naming is genuinely confusing in 2026 because both the old (Maker, DAI) and new (Sky, USDS, sUSDS) brands coexist. Functionally, Spark is the lending app where you deposit collateral like wBTC or cbBTC and borrow DAI or USDS at rates anchored to the Maker/Sky Dai Savings Rate (DSR) baseline plus utilization.
Spark inherits the risk discipline of MakerDAO, which is the most battle-tested DeFi credit system in existence. DAI has survived multiple crypto winters, the 2022 lending crisis, and several governance attacks without breaking its peg or losing user funds. Spark's smart contracts are forks of the Aave v3 codebase, which has its own long audit history. The honest read: the protocol layer is among the safest in DeFi, but you still inherit wrapped-Bitcoin trust assumptions (wBTC custodian, cbBTC Coinbase), smart contract risk, and Sky governance risk because Sky can change parameters via on-chain votes.
Variable, typically in the 4-9% range on DAI or USDS borrows in 2026. The rate is anchored to the Maker/Sky DSR baseline (which Sky governance adjusts based on broader market conditions) plus a utilization curve specific to the wBTC or cbBTC market. Because Sky uses DSR to actively manage DAI/USDS demand, Spark borrow rates tend to be more stable than pure utilization-driven protocols like Aave. There are no origination fees, no prepayment penalties, only Ethereum gas costs to open, manage, and close the position.
Both are stablecoins issued by the Sky/Maker ecosystem. DAI is the original, battle-tested since 2017, with the widest integration across DeFi, CEXes, and payment rails. USDS (and its yield-bearing wrapper sUSDS) is the post-2024 Sky upgrade with cleaner mechanics and built-in DSR yield accrual when held in sUSDS form. For most borrowers, DAI is the safer default because of universal liquidity and integration. USDS is preferred if you specifically want to hold the savings-bearing version or if you are operating fully inside the Sky ecosystem. Both can be swapped 1:1 via Sky's PSM (Peg Stability Module).
wBTC is issued by BitGo and merchants under the original WBTC consortium model. Every wBTC in circulation is backed 1:1 by native BTC held in BitGo custody. The trust assumption is real: if BitGo failed, suffered a breach, or was hit with a freeze order, wBTC could depeg. The 2024 governance drama around proposed custody changes for wBTC made this risk more visible. cbBTC is the Coinbase-issued alternative with a different custody profile (Coinbase Custody instead of BitGo). Spark supports both on different chains. Neither eliminates wrapped-Bitcoin risk; they just diversify which custodian you trust. For zero wrapping risk, see Hodl Hodl/Debifi or Surge Credit (Taproot vaults).
Roughly 75-80% liquidation threshold for wBTC in 2026, set by Sky governance and subject to change. That translates to a practical max LTV of ~70% if you want any safety margin against intraday volatility. Liquidations on Spark are executed by on-chain bots once the threshold is crossed; there is no margin-call grace period. The liquidation penalty is around 5%, paid to the liquidator. Compared to Aave, Spark tends to set slightly more conservative parameters because of MakerDAOs historically conservative risk culture, though both protocols update parameters frequently via governance.
Aave is the largest general-purpose DeFi lending protocol with the deepest wBTC liquidity, slightly higher LTV ceilings, and the most integrations. Coinbase Loans is the mainstream-branded routing into Morpho on Base, with cbBTC collateral, variable rates, and the highest LTV ceiling (~86%). Spark sits in between: more conservative parameters than Aave or Coinbase, anchored to the Maker/Sky DSR which gives more rate stability, and tightly integrated with the DAI/USDS ecosystem. Liquidity on Sparks wBTC market is thinner than Aave, which can matter for very large borrowers. For most retail-sized loans, the three are functionally similar; the choice comes down to which stablecoin you want and which governance regime you trust.
Sky governance (the renamed MakerDAO governance) can change Spark parameters at any time: liquidation thresholds, borrow caps, supported collateral, interest rate models, and even the protocols supported chains. Historically MakerDAO has been one of the more conservative DeFi governance systems, with multi-week formal vote processes and a strong risk team. That conservatism is the source of much of Sparks credibility. But Sky governance has also made aggressive moves (the 2024 Endgame restructuring, the USDS introduction, controversial USDC backing decisions during the SVB depeg). If you borrow on Spark, you should be aware that Sky governance can in theory change your loans terms going forward, though never retroactively for outstanding debt.
No. Spark is a permissionless on-chain protocol. You interact via a wallet (MetaMask, Rabby, hardware wallet, smart wallet). There is no signup, no account, no identity verification, no geographic restriction at the protocol layer. The Spark frontend (app.spark.fi) may geo-block or sanction-screen wallet addresses in certain jurisdictions, but the underlying contracts are accessible to anyone with a wallet and gas. This is the standard DeFi access model, in contrast to CeFi options like Strike or Ledn that require full KYC, or hybrid options like Coinbase Loans that require a KYC account to use the frontend.
Good for: DeFi-native users who already self-custody, want a borrow venue with strong MakerDAO/Sky risk discipline, prefer DAI or USDS as the borrowed stablecoin, and are comfortable with wBTC or cbBTC as collateral. Look elsewhere if: you need very large size at thin spreads (Aave has deeper wBTC liquidity), you want the absolute highest LTV available (Coinbase Loans goes to 86%), you want native non-wrapped Bitcoin collateral (use Hodl Hodl/Debifi or Surge Credit), or you want fixed predictable APR (use Strike or Ledn). For anyone who specifically wants DAI exposure and trusts the Maker/Sky risk culture, Spark is the natural choice.
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