CoWSwap vs ParaSwap
Neutral on-chain benchmarking of slippage, revert rates, and overall execution quality.
Protocol Scorecard
CoWSwap and ParaSwap are both DEX aggregators: rather than holding liquidity themselves, they split each order across many underlying pools to find the best available price. Because both compete on routing quality, the difference between them shows up in execution — realized slippage and MEV exposure — far more than in their headline rates.
Across the trades ClearTrace benchmarked, CoWSwap posted a slippage score of 87.2/100 versus 86.4/100 for ParaSwap — a statistical dead heat of 0.8 points. The score reflects realized slippage only — derived from median slippage versus a 1-minute VWAP, where a higher number means lower slippage. MEV exposure and revert rates are tracked as separate metrics. CoWSwap was measured over 17,914 trades and ParaSwap over 10,791.
The other axis is reliability: a swap that reverts on-chain still costs gas and a missed price. After a sender-level filter that excludes solver and MEV-bot spam (methodology v5), CoWSwap's revert rate is 0.14% of 55,684 routing transactions versus 3.01% of 84,598 for ParaSwap, tx-weighted across chains. Rates are recalculated on every data refresh; the live aggregator leaderboard carries the current per-chain numbers.
On current data the two are effectively tied — within measurement noise, either is a reasonable choice, and the better option often comes down to the specific token pair and trade size. We recalculate these scores on every data refresh; see our methodology for how they are derived.
Frequently Asked Questions
Which has better execution quality, CoWSwap or ParaSwap?
They are essentially tied on our slippage score. CoWSwap scored 87.2/100 and ParaSwap 86.4/100 in ClearTrace's on-chain benchmarking — a difference within measurement noise.
Does CoWSwap or ParaSwap offer better MEV protection?
ClearTrace publishes a slippage-based score and per-aggregator revert rates — not a per-aggregator MEV-protection score. On slippage, CoWSwap was tighter (~12.8 bps vs ~13.6 bps). For MEV specifically, the dashboard surfaces detected sandwich activity as a separate metric.
Is CoWSwap or ParaSwap 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.
What is the revert rate of CoWSwap vs ParaSwap?
A revert is a swap transaction that fails on-chain — the trader pays gas but gets no fill. After ClearTrace's sender-level filter that excludes solver and MEV-bot spam, CoWSwap's revert rate is 0.14% and ParaSwap's is 3.01% of tracked routing transactions, tx-weighted across chains. Rates are recalculated on every data refresh; per-chain numbers are on the ClearTrace aggregator leaderboard.