CoWSwap vs Uniswap
Neutral on-chain benchmarking of slippage, revert rates, and overall execution quality.
Uniswap shows tighter execution than CoWSwap on ClearTrace's on-chain slippage benchmark on Ethereum, 90.2 vs 80.4 out of 100 (a 9.8-point edge), measured across 365,599 and 13,319 benchmarked transactions there. Slippage, revert rate, and MEV exposure are scored separately. The gap is not the same on every chain these two share: Arbitrum (within measurement noise, 1.7 points). ClearTrace publishes one chain rather than a blend, so read this as a finding about Ethereum. (data as of October 14, 2026)
Protocol Scorecard
| CoWSwap | Uniswap | |
|---|---|---|
| Slippage Score (0-100) | 80.4 Ethereum |
90.2 Ethereum |
| Trades Analyzed Ethereum |
13,319 | 365,599 |
CoWSwap is a DEX aggregator that routes and splits orders across many venues, while Uniswap is a single automated market maker (AMM) trading against its own pools. The practical question is whether CoWSwap's routing and MEV-aware order flow actually beats trading directly on Uniswap. Note that CoWSwap can itself route through Uniswap pools, so this measures the value of aggregation, not rival liquidity.
Across the flow ClearTrace benchmarked, Uniswap posted a slippage score of 90.2/100 versus 80.4/100 for CoWSwap, a clear edge of 9.8 points on Ethereum. Ethereum is ClearTrace's publication chain: ClearTrace compares a pair on its publication chain when both venues are benchmarked there, and otherwise on the shared chain carrying the most data on the smaller side. Either way the comparison is one chain, not one venue's all-chain rollup set against another's, because two rollups cover different chains. The gap is not the same on every chain these two share: Arbitrum (within measurement noise, 1.7 points). ClearTrace publishes one chain rather than a blend, so read this as a finding about Ethereum. The score reflects realized slippage only, derived from median slippage versus a minute-level off-chain reference price (Dune prices.usd, an interpolated 5-minute exchange-aggregate feed and not a VWAP), where a higher number means lower slippage. The median is taken over individual fills, while the counts below are distinct transactions, and one transaction can contain several fills. MEV exposure and revert rates are tracked as separate metrics. Uniswap was measured over 365,599 benchmarked transactions (25% of its benchmarked flow) and CoWSwap over 13,319 benchmarked transactions (73% of its benchmarked flow).
The sample sizes differ substantially (Uniswap: 365,599 transactions; CoWSwap: 13,319), so CoWSwap's score reflects a narrower slice of activity and may move as more volume is observed.
On this data, Uniswap holds the stronger slippage score on Ethereum, but the gap reflects routing and slippage differences rather than one venue being universally better. That edge is a statement about Ethereum. Results shift with trade size, token pair, and market conditions, and MEV exposure and revert rates are separate considerations. Scores update on each data refresh; see our methodology for the full approach.
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Frequently Asked Questions
Which has better execution quality, CoWSwap or Uniswap?
Based on ClearTrace's slippage score (median slippage vs a minute-level off-chain reference price from Dune prices.usd, which is not a VWAP) on Ethereum, ClearTrace's publication chain, Uniswap edges out CoWSwap, 90.2/100 versus 80.4/100 (a 9.8-point gap). ClearTrace compares the two on one shared chain rather than setting one venue's all-chain rollup against another's. The gap is not the same on every chain these two share: Arbitrum (within measurement noise, 1.7 points). ClearTrace publishes one chain rather than a blend, so read this as a finding about Ethereum.
Does CoWSwap or Uniswap offer better MEV protection?
ClearTrace publishes a slippage-based score and per-aggregator revert rates, not a per-aggregator MEV-protection score. On slippage, Uniswap was tighter on Ethereum (~9.8 bps vs ~19.6 bps). For MEV specifically, the dashboard surfaces detected sandwich activity as a separate metric.
Is CoWSwap or Uniswap better for large trades?
For large orders, aggregators such as CoWSwap can split a trade across multiple pools to reduce price impact, which often helps on size. The right venue still depends on the specific pair and amount. The live dashboard tracks current execution quality.