Frax vs Sky: Which Stablecoin Protocol Wins in 2026
// Quick answer
Pick Sky. USDS plus DAI combined supply is ~$7B vs Frax's ~$700M frxUSD.
Most stablecoin protocol comparison guides hedge. This one picks a winner.
Sky wins on supply scale, RWA-backed reserves, ecosystem maturity and the most battle-tested decentralized stablecoin protocol with $7B+ in USDS/DAI supply. Frax wins on multi-token product breadth (frxUSD, sFRAX, FXS, frxETH) and the Fraxchain L2 ecosystem giving Frax a unified vertical stack. If you want maximum decentralized stablecoin liquidity pick Sky. If you want a multi-product stablecoin protocol with native L2 pick Frax. Built and tested with crypto SEO audit tool by Crawlux.
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// TL;DR
Key takeaways
- →Pick Sky. USDS plus DAI combined supply is ~$7B vs Frax's ~$700M frxUSD.
- →Pick Frax. Fraxchain L2 plus frxETH liquid staking plus Fraxlend create a vertical ecosystem.
- →Frax: Massive supply and ecosystem scale.
- →Sky: Multi-product stack creates unique vertical integration.
Frax vs Sky at a glance
Skip to the section you need. Or read the full breakdown below.
If you want the largest decentralized stablecoin
Pick Sky. USDS plus DAI combined supply is ~$7B vs Frax's ~$700M frxUSD.
If you want a unified protocol stack with L2
Pick Frax. Fraxchain L2 plus frxETH liquid staking plus Fraxlend create a vertical ecosystem.
If you want passive savings yield
Pick Sky. sUSDS Sky Savings Rate has been more stable and higher than sFRAX historically.
If you want maximum ecosystem token utility
Pick Frax. FXS captures protocol revenue across multiple Frax products.
Why Sky is better than Frax
Frax wins on three specific axes that matter for most Stablecoin protocol users.
Massive supply and ecosystem scale. Sky has ~$7B combined USDS+DAI supply vs Frax's ~$700M frxUSD. The 10x scale advantage means materially deeper liquidity, broader DeFi integration and stronger network effects. Major DeFi protocols (Aave, Curve, Spark) have deep DAI/USDS markets that frxUSD cannot match. For users wanting decentralized stablecoin with maximum integration depth Sky is the only practical choice.
Mature RWA-backed reserves diversify peg defense. Sky holds significant USDC, USDT, RWA-backed assets and DSR-eligible collateral generating real yield. The reserve diversification provides strong peg defense across different market conditions. Frax has reserve transparency but smaller scale and less RWA exposure. For institutional comfort Sky's reserve composition is meaningfully stronger.
4+ years of peg defense through major stress events. DAI maintained its peg (mostly) through Black Thursday March 2020, Luna collapse, FTX collapse and USDC depeg March 2023. The operational track record across multiple stress events is real validation of the protocol design. Frax has also performed well through these events but at smaller scale and over shorter timeframes.
Why Frax is better than Sky
Sky wins on a different set of axes. Three points where it materially beats Frax.
Multi-product stack creates unique vertical integration. Frax operates frxUSD (stablecoin), sFRAX (savings), FXS (governance), frxETH (liquid staked ETH), sfrxETH (staked frxETH yield), Fraxlend (lending), Fraxswap (DEX with TWAMM), Fraxferry (cross-chain) and Fraxchain (L2). The vertical stack lets users access multiple DeFi primitives within one protocol family. Sky has fewer integrated products.
Fraxchain L2 captures sequencer revenue for FXS holders. Fraxchain (launched 2024) is a Fraxtal L2 (OP Stack-based) where sequencer revenue flows back to FXS holders. The L2 integration gives Frax a structural revenue stream that Sky does not have. For FXS holders the protocol economics include both stablecoin operations and L2 fees.
frxETH provides liquid staked ETH alongside stablecoin operations. frxETH is a liquid staking token competing with Lido's stETH and Rocket Pool's rETH. The integrated ETH staking inside Frax's stablecoin protocol creates synergies (frxETH backs frxUSD reserves, sfrxETH yield powers sFRAX) that Sky cannot replicate without separate ETH staking infrastructure.
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What each does well
The skimmable view: top strengths of each, in five bullets.
Frax
What Sky does well
- $7B combined USDS+DAI supply
- Mature RWA-backed reserves
- Sky Savings Rate via sUSDS
- Spark SubDAO ecosystem
- 4+ years peg defense track record
Sky
What Frax does well
- Multi-product stack (stable + LSD + DEX + L2)
- Fraxchain L2 sequencer revenue
- frxETH liquid staking
- FXS captures revenue from multiple products
- TWAMM-based Fraxswap
Frax vs Sky scorecard
Public-data comparison across the metrics that matter.
Live · Updated 1m ago| Metric | Frax | Sky |
|---|---|---|
| Launched | Dec 2017 (MKR/DAI); Sky rebrand 2024 | Dec 2020 |
| Stablecoin supply | ~$7B (USDS + DAI combined) | ~$700M (frxUSD) |
| Native tokens | MKR/SKY (governance), USDS/DAI (stablecoin) | FXS (governance), FRAX/frxUSD (stable), frxETH (LSD) |
| Token supply | 1M MKR / SKY (24,000:1 swap), USDS/DAI demand-based | 100M FXS max (~75M circulating); frxUSD demand-based |
| Collateral model | Multi-collateral CDP + RWA + USDC | Hybrid algorithmic + collateral (refactored 2023) |
| Native L2 | None (Spark on Ethereum + Gnosis) | Fraxchain (OP Stack L2 launched 2024) |
| LSD product | None native | frxETH + sfrxETH |
| Savings rate (May 2026) | ~6-8% APR (DSR/Sky Savings Rate) | ~5-7% APR (sFRAX) |
| Lending product | Spark (SubDAO) | Fraxlend |
| DEX product | None native | Fraxswap (TWAMM) |
| Auditors of record | Trail of Bits, OpenZeppelin, Runtime Verification | Trail of Bits, Code4rena, Certik |
| Major exploit history | No protocol exploits | No protocol exploits |
// Sources
Verified using these public datasets
DefiLlama
TVL, volume and protocol metrics
CoinGecko
Token price, supply and market data
Etherscan
On-chain contract verification
All numbers cross-referenced against the sources above.
How Frax and Sky work
How Frax works
Sky (formerly MakerDAO) issues two stablecoins: DAI (legacy multi-collateral) and USDS (newer Sky-aligned). Both are overcollateralized by user-locked collateral (ETH, wBTC, USDC, RWAs etc.) plus protocol-managed reserves. The DSR (Dai Savings Rate) lets DAI/USDS holders earn yield by locking in the savings module. The Endgame restructuring (2024) introduced Sky as the umbrella, USDS as the new flagship stablecoin and SubDAOs (Spark for lending, others for specific use cases). MKR is the governance token (with optional 24,000:1 swap to SKY). The protocol has $7B+ combined supply with deep DeFi integration.
How Sky works
Frax originally launched as a fractional algorithmic stablecoin in 2020 then refactored to fully collateralized in 2023. frxUSD is now backed by USDC reserves and RWA-backed holdings. sFRAX is the savings variant earning Frax-managed yield. Frax operates a vertical stack: FXS (governance), frxETH (liquid staked ETH), sfrxETH (yield-bearing staked ETH), Fraxlend (isolated lending), Fraxswap (TWAMM DEX) and Fraxchain (Fraxtal L2 launched 2024 for OP Stack-based scaling). The integrated products share liquidity and economic flows: sequencer revenue from Fraxchain flows to FXS holders, sfrxETH yield powers parts of sFRAX, etc.
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Token economics: Frax vs Sky
Frax tokenomics
MKR launched 2017 with ~1M max supply. Some users have opted to swap MKR for SKY at 24,000:1 ratio (so SKY supply is ~24B). MKR/SKY utility: governance over all Sky operations, surplus auctions reduce MKR supply when protocol generates surplus, deficit auctions mint MKR for shortfall coverage. USDS and DAI are demand-based stablecoins with no supply cap; they are minted against collateral and burned on repayment. The Sky Savings Rate is funded from stability fees and reserve yields. As of 2026 Sky is one of the most profitable DeFi protocols by net revenue.
Sky tokenomics
FXS launched 2020 with 100M max supply. ~75M circulating in May 2026. Distribution: 60% to liquidity programs and rewards (over time), 20% to team (vested), 20% to investors and treasury (vested). FXS utility: governance over Frax protocol parameters, fee accrual from multiple Frax products (frxUSD operations, Fraxlend interest, Fraxswap fees, Fraxchain sequencer revenue, sfrxETH staking yield). The multi-product fee accrual makes FXS one of the more economically integrated DeFi tokens.
Security history and audits
Frax security record
Sky has been audited by Trail of Bits, OpenZeppelin, Runtime Verification and others. There have been no protocol-level fund-loss exploits since launch in 2017. The protocol has weathered Black Thursday March 2020 (where DAI auction system underperformed but was fixed without protocol failure), Luna collapse, FTX collapse and USDC depeg without major incidents. Sky's surplus buffer (~$80M) provides ongoing peg defense capacity. The protocol has never required emergency emergency MKR minting in over 7 years of operation.
Sky security record
Frax has been audited by Trail of Bits, Code4rena and Certik. There have been no protocol-level exploits since launch in 2020. The 2023 refactor from fractional algorithmic to fully collateralized was executed cleanly. Frax's reserve transparency is strong with on-chain accounting of all backing assets. The multi-product nature creates more complex attack surface than Sky's narrower focus but has not produced incidents to date. Bug bounty via Immunefi pays up to $5M.
// AB's take
After auditing 200+ DeFi sites with TG3, here's the pattern: protocols that survive bull and bear cycles win on boring infrastructure, not yield wars. Frax and Sky both have audit pedigree. The real differentiator isn't the audit count, it's whether the team ships during downturns. Both have. That alone puts them ahead of 90% of the Stablecoin protocol space.
User experience and real fees
Frax UX
Sky's interface at app.sky.money is split between stablecoin operations (mint USDS/DAI, savings via sUSDS) and governance (MKR/SKY voting, polls, executive votes). The interface is functional but less polished than DeFi competitors. DAI/USDS work natively in every major DeFi protocol so most users interact with Sky indirectly via Aave, Curve, Spark or other venues. Direct CDP management (locking ETH to mint DAI) is for sophisticated users. Mobile-friendly though desktop is primary.
Sky UX
Frax's interface at app.frax.finance covers all Frax products in unified UX: mint frxUSD, stake to sFRAX, manage frxETH/sfrxETH, use Fraxlend or Fraxswap, bridge to Fraxchain. The unified experience is genuinely useful for users wanting access to multiple DeFi primitives. Wallet support universal. Mobile-friendly. The complexity of the multi-product stack means new users need some education to understand what each Frax product does and when to use it.
Who should use Frax, who should use Sky
| User type | Recommendation |
|---|---|
| Maximum decentralized stablecoin liquidity seekers | Sky. $7B supply vs Frax's $700M creates a 10x integration depth advantage. |
| Vertical DeFi stack users | Frax. Stable + LSD + DEX + lending + L2 all under one roof. |
| Passive stablecoin yield seekers | Sky. Sky Savings Rate has been more stable and competitive. |
| Frax LSD ETH stakers | Frax. frxETH and sfrxETH provide liquid ETH staking with Frax-protocol synergies. |
| Multi-product DeFi users wanting unified tokenomics | Frax. FXS captures revenue from multiple products. |
| Institutional stablecoin users | Sky. RWA-backed reserves and proven peg defense across multiple stress events. |
// AB's take
If you're marketing a DeFi protocol that competes with Frax or Sky, schema is your enable. Most Stablecoin protocol sites I audit are missing FinancialProduct schema entirely. Your TVL leader page can outrank both these giants for long-tail queries if you ship the schema they haven't. Boring win, real money.
Final verdict on Frax vs Sky
Sky is the dominant decentralized stablecoin protocol. The supply scale, RWA-backed reserves and 4+ year track record of peg defense through major stress events create the strongest decentralized stablecoin proposition in DeFi. For users wanting maximum integration depth Sky is the practical default. Frax is the multi-product alternative. The vertical stack from stablecoin to L2 creates a unique DeFi protocol family with FXS capturing revenue across products. For users wanting a unified protocol experience with native LSD ETH staking and an L2 ecosystem Frax delivers a different value proposition. Most DeFi users hold USDS/DAI primarily for stable liquidity and FXS or frxETH for specific Frax product participation. The protocols target different needs.
Use the one your team can support best. Operational fit beats theoretical fit.
Frequently asked
01 What is the difference between USDS and DAI?
02 Did Frax abandon the algorithmic stablecoin model?
03 What is Fraxchain and is it worth using?
04 Which has better stablecoin yield, Sky or Frax?
05 Should I hold MKR/SKY or FXS for stablecoin protocol exposure?
About AB
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Sources and methodology
All data points cited in this Frax vs Sky comparison were verified against the public datasets listed below. On-chain figures cross-referenced via Etherscan and chain-specific block explorers. Token economics pulled from project documentation and verified third-party trackers. Audit firm references cited from each protocol's public security disclosures.
- [01]DefiLlama · TVL, volume and protocol metrics
- [02]CoinGecko · Token price, supply and market data
- [03]Etherscan · On-chain contract verification
This article is for informational purposes only and does not constitute financial advice. Crypto investments carry risk. Always do your own research before making any financial decision.
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