What's the cheapest decentralized exchange right now?

There isn't one. The "cheapest" decentralized exchange (DEX) changes by the hour, because most of your cost is the network fee, not the platform's own swap fee. A DEX that's cheap on a quiet night can cost several times more during a busy morning.

So instead of naming a winner we can't verify, this guide shows what drives DEX cost, compares six platforms by structure, and gives you a short process to check the real price before you swap.

What changed on 2026-10-22: added sourced protocol fee data for Uniswap (pool fee tiers) and dYdX (maker/taker schedule) — the only two of these six platforms with a fee figure in our records — see the table and per-platform notes below.

DISCLOSURE: CompareCEX may earn a commission when you sign up through our links. This does not influence our editorial scores. RISK: Crypto assets are volatile and unregulated in many jurisdictions. Not financial advice.

What makes one decentralized exchange cheaper than another?

Three things decide your total cost on a DEX:

1. Network fee (gas). You pay the blockchain, not the DEX, to process your transaction. This moves with traffic, not with which app you use.
2. Protocol swap fee. A small percentage the liquidity pool or router takes. It's usually fixed per pool.
3. Slippage. The gap between the price you expect and the price you get, caused by low liquidity or a large order size.

A DEX with a low swap fee on a congested network can still cost more than a DEX with a higher swap fee on a cheap network. A flat "cheapest exchange" ranking doesn't really work for DEXs the way it does for centralized platforms.

We have sourced, dated protocol fee data for two of these six: Uniswap's pool-level fee tiers and dYdX's maker/taker schedule (see the per-platform notes below). For the other four — PancakeSwap, Curve, 1inch, and Jupiter — we don't have an independently sourced, dated figure we could cite with confidence, either because no entry exists in our records yet or because the platform is an aggregator with no single fixed fee of its own. Where we illustrate the math below, we still use plain placeholder values rather than a quoted rate, since the worked example is about how gas and swap fees interact, not about any one platform's actual numbers.

How do DEX fees actually work? (two worked examples)

The formula is simple: trade size times fee rate equals swap cost. The numbers below are placeholder values for the arithmetic only, not a rate quoted by any exchange.

Example 1: a quiet network. Say your trade size is one hundred units of value, and the pool charges a fee rate of one percent. Trade size times fee rate gives a swap cost of one unit. Add a network fee worth about half a unit during a quiet period. Total cost: roughly one and a half units, close to one and a half percent of the trade.

Example 2: a busy network. Same trade, same pool, same one percent fee rate, so the swap cost is still one unit. But the network fee jumps to nine units because traffic is heavy. Total cost: ten units, or ten percent of the trade. Same DEX. Same pool. Ten times the cost, in a different hour.

That gap is the whole story. Picking a DEX by its advertised swap fee alone tells you almost nothing about what you'll actually pay.

Which decentralized exchanges are worth comparing?

Below is a structural comparison, not a price ranking. We have sourced fee figures for Uniswap and dYdX (noted in their rows and the write-ups below); the other four don't have a sourced, dated figure to cite.

Uniswap. Reason to choose it: deep liquidity for popular tokens usually means less slippage on mid-size trades. Its own protocol fee is tiered by pool, from 0.05% up to 1%, set by the protocol rather than negotiated per trade^†. Limitation: it runs mainly on Ethereum, where gas cost swings a lot during busy periods, and that gas-side cost is still not something we have a verified current figure for.

PancakeSwap. Reason to choose it: if you already hold assets on BNB Chain, you skip a bridge step. Limitation: fee and gas numbers aren't verified here, and liquidity for smaller tokens can be thinner than on Ethereum-based pools.

Curve. Reason to choose it: built specifically for assets that trade near the same value, like stablecoins, which keeps slippage small on those pairs. Limitation: that advantage mostly disappears once you trade volatile, non-pegged tokens.

1inch. Reason to choose it: as an aggregator, it checks several DEXs and routes your trade through the cheaper path it finds at that moment. Limitation: your final cost still depends on the gas price of whichever chain it routes through, so it isn't fixed either.

Jupiter. Reason to choose it: built for Solana, a network generally known for fast transaction processing. Limitation: we don't have a verified, dated network-fee figure to quote, and Solana has had periods of congestion in the past.

dYdX. Reason to choose it: an order-book model can suit traders who want tighter control over entry price on derivatives, and its own fee schedule lists a Tier I (under $1M in 30-day volume) rate of 0.02% maker / 0.05% taker^†† — both well below typical centralized-exchange spot rates. Limitation: it's a leverage product, not a simple spot swap tool, and leverage adds a different kind of risk entirely; this fee schedule also applies to perpetuals trading, not a direct token-for-token swap like the AMM-style platforms above.

How can you check the real cost before you swap?

Don't trust the headline fee. Check the live number.

1. Open the swap screen and look at the quoted output amount, not just the fee label.
2. Check your wallet's gas estimate before confirming. If it looks high, wait.
3. Compare the same trade on two networks if your tokens exist on both.
4. Lower your slippage tolerance for small, liquid trades. Raise it only when a pool is thin.
5. Test with a small amount first if you're moving a large sum for the first time.
6. If the whole process feels like too many moving parts, a centralized exchange might fit you better. Our fee calculator tool shows live cost estimates for that route.

If you're not sure a DEX is even the right tool for your situation, our exchange finder walks through a short set of questions first.

Common mistakes that make a "cheap" DEX expensive

• Comparing only the swap fee percentage. Gas and slippage usually matter more than the pool's own fee. One trader keeping a simple log of what they actually paid per swap, across different times of day, learns their real cost faster than reading any fee page .
• Chasing a fraction of a percent across platforms. Switching networks to save a few cents isn't free either, it costs time and adds new risk. A fixed rule, decide your network and your maximum acceptable slippage before you open the swap screen, works the same way a hard risk limit works for a trader: it removes the decision from the moment you're most tempted to skip it .
• Ignoring liquidity for the token pair. A low swap fee on a thin pool can cost more in slippage than a higher fee on a deep pool.
• Forgetting the bridge cost. Moving funds between chains to reach a "cheaper" DEX often has its own fee that cancels the savings.
• Treating fee-shopping as the main skill to improve. Shaving a small percentage off a swap fee rarely fixes bigger problems like overtrading or no exit plan. Those sit at a different level of the problem entirely .

FAQ

Is a DEX always cheaper than a centralized exchange?

Not always. It depends on the network fee at that moment, your trade size, and the exchange's own fee structure. Compare both before assuming either side wins. See binance vs coinbase if you're weighing centralized options instead.

Do decentralized exchanges charge withdrawal fees?

A DEX doesn't hold your funds, so there's no exchange-side withdrawal fee the way there is on a centralized platform. You still pay the network fee to move tokens, separate from the swap itself.

What is slippage and why does it add to my cost?

Slippage is the difference between the price shown and the price you actually get, usually because the pool doesn't have enough depth for your order size. On thin pools, this can cost more than the swap fee itself.

Can the network fee change in the middle of my trade?

Yes. Gas prices move constantly. Most wallets let you set a maximum you're willing to pay, so the transaction fails instead of charging you more than expected.

The direct answer

There's no single cheapest DEX you can bookmark and trust forever. Cost depends on the chain, the hour, and your trade size, not the brand name on the app. Check the live gas estimate and the quoted output before every swap, not the marketing page. If you'd rather skip wallet setup and gas estimates, compare a centralized option first.

See our full best exchanges list for beginners, and read our methodology page to see how we build comparisons like this one.