CoWSwap vs ParaSwap
Neutral on-chain benchmarking of slippage, revert rates, and overall execution quality.
CoWSwap and ParaSwap are effectively tied on ClearTrace's on-chain slippage benchmark, 88.6 vs 87.8 out of 100 (within measurement noise), so the better choice comes down to the specific token pair and trade size. (data as of July 15, 2026)
Protocol Scorecard
| CoWSwap | ParaSwap | |
|---|---|---|
| Slippage Score (0-100) | 88.6 | 87.8 |
| Trades Analyzed | 15,189 | 9,470 |
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 88.6/100 versus 87.8/100 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 15,189 trades and ParaSwap over 9,470.
The other axis is reliability — but it is not one we will rank these two on. CoWSwap and ParaSwap settle differently, so their on-chain revert rates are not comparable: CoWSwap is a batch auction venue, where the user signs an order and a solver settles it in a batch, so orders that cannot be filled never become transactions at all; ParaSwap is a router venue, where the user signs and submits the swap transaction, so a failed swap fails on-chain and is counted. CoWSwap's on-chain revert rate is therefore structurally near zero regardless of how reliably it fills, and putting that number next to a router's would overstate its reliability rather than measure it. ClearTrace ranks revert rates only within an execution model. For a like-for-like reliability read, compare CoWSwap and ParaSwap each against venues that settle the way they do; the live aggregator leaderboard tags every venue with its execution model.
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.
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Frequently Asked Questions
Which has better execution quality, CoWSwap or ParaSwap?
They are essentially tied on our slippage score. CoWSwap scored 88.6/100 and ParaSwap 87.8/100 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 (~11.4 bps vs ~12.2 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. ClearTrace does not publish a revert-rate comparison for CoWSwap vs ParaSwap. CoWSwap and ParaSwap settle differently, so their on-chain revert rates are not comparable: CoWSwap is a batch auction venue, where the user signs an order and a solver settles it in a batch, so orders that cannot be filled never become transactions at all; ParaSwap is a router venue, where the user signs and submits the swap transaction, so a failed swap fails on-chain and is counted. CoWSwap's on-chain revert rate is therefore structurally near zero regardless of how reliably it fills, and putting that number next to a router's would overstate its reliability rather than measure it. ClearTrace ranks revert rates only within an execution model. Each venue's revert rate is published on the ClearTrace aggregator leaderboard alongside its execution model, and ranked only against venues that settle the way it does.