The Best Decentralised Exchanges for UK Crypto Users
Your coins, your keys, your rules. A plain-English look at the top DEX platforms so you can trade without handing custody to anyone.
What is a DEX and why would you use one?
A decentralised exchange (DEX) lets you trade cryptocurrency directly from your own wallet, without an exchange holding your funds. There is no account to create, no identity verification, no risk of the platform freezing your assets. You connect your wallet, make your trade, and the blockchain handles the settlement automatically.
Compare that to a centralised exchange like Coinbase or Kraken, where you deposit your crypto into the platform's custody and trust them to handle it securely. Both have their place, but for people who have moved beyond the basics and want more control over their assets, DEXs are an essential part of the toolkit.
On a CEX (centralised exchange), your assets are held by the company. You have a username and password, and the platform settles trades on your behalf. On a DEX, you trade via smart contracts. Your private keys never leave your wallet, which means nobody can freeze, confiscate or lose your funds except you. The trade-off: there is no customer support if you make a mistake, and you need a crypto wallet to get started.
- Best overall DEX for trading: Hyperliquid (fastest, deepest liquidity, lowest fees)
- Best newcomer with extreme features: Aster (1001x leverage, stock perps, Binance backing)
- Best for Solana DeFi: Jupiter (aggregates every Solana DEX at once, free swaps)
- Best for Arbitrum and passive yield: GMX (real yield for liquidity providers, oracle pricing)
- Best for beginners exploring DeFi: Jupiter (clean interface, near-zero fees on Solana)
- Most established/battle-tested: GMX (launched 2021, multiple security audits)
How DEXs work: a 3-minute explanation
The mechanics vary between platforms but the core idea is the same: trading is handled by code (smart contracts) rather than by a company. Here's the typical flow for getting started and making your first trade.
You need a self-custody wallet like MetaMask (for Ethereum-compatible chains), Phantom (for Solana), or a hardware wallet. This is where your crypto lives. The DEX never holds it for you.
You will need the native currency of the chain you are using to pay gas fees: ETH for Arbitrum-based DEXs (like GMX), SOL for Solana-based DEXs (like Jupiter), and USDC or other stablecoins to use as collateral for trading.
Visit the DEX website, click "Connect Wallet", approve the connection in your wallet app, and you are ready. Place a trade, sign the transaction in your wallet, and it settles on-chain in seconds. No email. No KYC. No account.
At every step, your assets stay in your wallet. The DEX's smart contracts handle the trade mechanics, but custody never changes hands. To stop trading, simply disconnect your wallet. Your funds are still exactly where you left them.
Smart contract bugs can be exploited. Every DEX in this guide has been audited by independent security firms, but no smart contract is 100% risk-free. Only use funds you can afford to have at risk, and consider moving larger holdings to a hardware wallet when you are not actively trading. Take a look at our hardware wallet guide if you have not already.
A note for UK users before you start
DEXs exist in a different regulatory space from centralised exchanges. Because they are non-custodial and operate via smart contracts rather than as companies with UK offices, they do not require FCA registration in the same way that Coinbase or Kraken do. You are not handing over your identity or your funds to anyone, which is precisely the point.
However, UK tax rules still apply. HMRC treats DeFi activity just like any other crypto transaction. Swapping tokens on Jupiter, taking profits on a Hyperliquid perpetuals position, or receiving yield from a GMX liquidity pool all have potential tax implications. You still owe Capital Gains Tax (CGT) on gains above the annual £3,000 allowance, and staking or liquidity income may be treated as income tax. All of this is reportable, and from January 2026, centralised on-ramps you use to fund your DeFi activity will be sharing data with HMRC automatically.
Keep a record of every transaction: the date, the amount, the value in GBP at the time of the trade, and any fees paid. This sounds tedious but a tool like Koinly or Recap can pull your on-chain history automatically and generate an HMRC-ready report. Starting this habit early saves a significant amount of stress come self-assessment time.
None of the four platforms in this guide are restricted to non-UK users. Hyperliquid explicitly restricts US and Ontario users but is available to UK residents. Jupiter, GMX and Aster are similarly accessible from the UK without restrictions.
All 4 platforms compared at a glance
Here is a quick summary of the main differences. More detail on each follows in the reviews below.
| Platform | Chain | Type | Perp Fees (Maker/Taker) | Max Leverage | Best For | Beginner Friendly |
|---|---|---|---|---|---|---|
| Hyperliquid | Own L1 | Order Book Perps + Spot | 0.015% / 0.045% | 50x | Perps traders | Medium |
| Aster | Aster Chain + Multi | Order Book Perps + Spot | 0.01% / 0.035% | 1001x | High leverage traders | Medium |
| Jupiter | Solana | Aggregator + Perps | 0% (swaps) / 0.1% (perps) | 250x (perps) | Solana DeFi users | High |
| GMX | Arbitrum + Avalanche | Perps + Spot (Pool-based) | 0.05% / 0.10% | 100x | Perps + passive yield | Medium |
Fees and features correct at time of writing. Always check official platform docs for current rates. Perpetual positions also incur ongoing funding rates that vary by market conditions.
New to DeFi? Jupiter on Solana is the gentlest starting point. Near-zero fees, a clean interface, and no sign-up required. All you need is a Phantom wallet.
Try Jupiter →Full reviews: every platform covered
Here is everything you need to know about each platform, in plain English.
Hyperliquid is remarkable for one reason above all others: it is a decentralised exchange that genuinely competes with centralised platforms on speed and fee efficiency. Most DEXs either feel clunky compared to a proper exchange or sacrifice decentralisation to achieve performance. Hyperliquid chose a different path and built its own Layer-1 blockchain from scratch, optimised entirely around financial trading. The result is sub-second trade finality, an on-chain order book, zero gas fees for placing and cancelling orders, and throughput of up to 200,000 transactions per second.
By early 2025, Hyperliquid had processed over $3 trillion in cumulative trading volume and commanded more than 50% of the entire decentralised perpetuals market. It generates more on-chain fee revenue than virtually any other DeFi protocol, placing third behind only Tether and Circle across all blockchain projects. Considering it operates with around 11 full-time employees and is almost entirely automated through smart contracts, that is quite extraordinary.
The trading experience on Hyperliquid feels genuinely like a professional exchange. You get a proper central limit order book, market and limit orders, stop-loss and take-profit triggers, TWAP execution for larger positions, and up to 50x leverage. Fees start at 0.045% for takers and 0.015% for makers at the base tier, with reductions for higher volume and HYPE token staking. The HYPE token itself launched via one of the largest community airdrops in crypto history in November 2024, distributing 75% of supply to users rather than venture capital firms.
To use Hyperliquid, you bridge USDC from Arbitrum (or other supported chains) onto the Hyperliquid L1. The bridge process costs a small Arbitrum gas fee, typically under $0.10, and Hyperliquid charges nothing on deposit. Note that Hyperliquid is not available to US residents or users in Ontario, Canada. UK users have full access.
Hyperliquid currently operates with 21 validators, which is small compared to Ethereum's 800,000+. During the March 2025 JELLY token incident, the team intervened manually to prevent a potential exploit, which highlighted that the network retains centralised control in emergency situations. This is a known and acknowledged risk. The team has been transparent about it and validator count is growing, but it is worth understanding before committing significant capital.
- Fastest DEX execution available (sub-second)
- Zero gas fees for order placement
- Industry-leading perp fees (0.015% maker)
- Over 50% of global DEX perp market share
- $3 trillion in cumulative trading volume
- HLP vault lets you earn yield by providing liquidity
- Community airdrop, not VC-owned
- Only 21 validators (centralisation risk)
- Team intervened during March 2025 JELLY incident
- Not suitable for absolute beginners
- Requires bridging USDC from another chain first
- HYPE token unlock schedule adds supply pressure
- Not available to US residents
Aster is the most talked-about new entrant to the DEX space. It launched officially in March 2025 as the result of a merger between two earlier DeFi projects, APX Finance and Astherus, and it has grown at a speed that turned heads across the industry. By September 2025, just months after launching, it briefly claimed nearly 70% of monthly decentralised perp DEX volume, though Hyperliquid has since reclaimed the dominant position with Aster settling at roughly 15% market share as of early 2026.
The backing behind Aster is its most distinctive feature. YZi Labs (formerly Binance Labs) provided seed investment. Changpeng Zhao, Binance's founder, serves in an advisory capacity and personally purchased 2 million ASTER tokens in November 2025. Several former Binance engineers are part of the team. That level of ecosystem connection brings both credibility and scrutiny in equal measure.
What Aster actually does is impressive. It offers perpetual trading across BNB Chain, Ethereum, Solana and Arbitrum simultaneously. You can trade crypto perps with up to 100x leverage in standard mode or up to 1001x in "Degen mode" (a name that should give you an indication of the risk involved). It also offers tokenised perpetuals on US stock like Apple and Tesla, giving 24/7 exposure to traditional market assets without any broker. Hidden limit orders protect large traders from front-runners. The USDF stablecoin earns yield on your trading collateral while you hold positions, effectively making your margin work twice.
There is one controversy to address honestly. In October 2025, DeFiLlama temporarily removed Aster's volume data after detecting a suspiciously close correlation between its reported volumes and Binance's own volumes, raising questions about data integrity. Aster disputed the claim and the data was later reinstated, but it is worth knowing about if you are placing significant capital on the platform.
- Multi-chain: BNB Chain, Ethereum, Solana, Arbitrum
- Very low fees (0.01% maker, 0.035% taker)
- Stock perps: trade Apple, Tesla etc. 24/7 on-chain
- Hidden orders for execution privacy
- USDF collateral earns yield while you trade
- Backed by YZi Labs and endorsed by CZ
- 15 million registered users as of April 2026
- Volume data controversy (DeFiLlama, Oct 2025)
- Relatively young platform (launched March 2025)
- 1001x leverage carries extreme liquidation risk
- USDF relies on Binance infrastructure
- Pseudonymous team
- No fiat on-ramp, no direct GBP support
Jupiter is not a DEX in the traditional sense. It is a DEX aggregator, which means it does not have its own liquidity pools. Instead, it simultaneously scans every major decentralised exchange and liquidity pool on Solana (including Raydium, Orca, Meteora, and more than 50 others) and routes your trade through whichever combination gives you the best price. Think of it as a price comparison engine that then automatically books the cheapest option, all within a single transaction.
The result is that Jupiter consistently finds better execution prices than going to any single Solana DEX directly, especially for larger trades where splitting across multiple pools reduces slippage. As of early 2025, Jupiter handles around 95% of all DEX aggregator volume on Solana and more than 50% of total Solana DEX trading volume. That dominance is not marketing. It reflects the fact that even competing DEXs on Solana often route through Jupiter's APIs rather than building their own routing infrastructure.
What started as a simple swap tool has expanded into what its team calls a "DeFi superapp." Today Jupiter also offers limit orders with front-running protection, a dollar-cost averaging (DCA) tool for automated recurring buys, a perpetuals exchange with up to 250x leverage on SOL, ETH and BTC, liquid staking via JupSOL, a native stablecoin called JupUSD (backed in part by BlackRock's BUIDL fund), and as of February 2026, integrated prediction markets through Polymarket. Jupiter's swap fees are zero at the platform level. You only pay the underlying DEX fees (typically 0.05% to 0.30%) and Solana network gas, which usually comes to fractions of a penny per transaction. That makes it the most accessible entry point to DeFi for users who want to dip their toes in without significant cost.
- Zero platform fees on swaps
- Finds best price across 50+ Solana DEXs automatically
- Incredibly low Solana gas fees (fractions of a penny)
- 95% of Solana DEX aggregator market share
- DCA tool, limit orders, perps all in one place
- JupUSD stablecoin earns native yield
- Prediction markets via Polymarket integration (2026)
- Solana-only (if Solana goes down, Jupiter goes down)
- JUP token under price pressure from unlock schedule
- Co-founders are pseudonymous
- No dedicated mobile app yet
- Perps liquidity not as deep as Hyperliquid
GMX has been running since September 2021 and has accumulated a reputation for reliability, security and genuine value distribution to its community. Where most DeFi protocols pay liquidity providers through token emissions (essentially printing new tokens), GMX distributes real trading fees: actual ETH and AVAX earned from trading activity. That "real yield" model attracted serious DeFi users who had grown tired of farming tokens that immediately lost their value.
The technical design is also genuinely different from most DEXs. Rather than an order book, GMX uses what it calls a peer-to-pool model. Traders open positions against a shared liquidity pool (called GM pools in V2), and prices are determined by Chainlink oracles rather than by the pool's own supply and demand dynamics. This means zero price impact on trades regardless of size, which is a meaningful advantage for anyone trading larger positions. You do not move the market when you buy or sell on GMX.
The platform is live on Arbitrum (its primary home), Avalanche, and as of 2025, several additional chains including Base and MegaETH. It recently added gold and silver perpetuals alongside crypto markets, expanding into real-world asset trading. The GMX token earns 30% of all trading fees when staked (paid in ETH or AVAX), while liquidity providers in GM pools earn the majority of remaining fees. If you want to earn a passive yield from on-chain trading activity rather than just trade yourself, GMX is one of the cleanest mechanisms in DeFi to do it.
The downside is that GMX supports a more limited selection of assets compared to Hyperliquid or Aster. V2 lists around 31 trading pairs, which is fine for major crypto and some commodity exposures, but nowhere near the breadth of the newer perpetuals DEXs. The interface is also more complex than Jupiter, which makes it harder to recommend as a first DeFi experience.
- Real yield for stakers and LPs (paid in ETH/AVAX)
- Zero price impact on trades of any size
- Multiple security audits and 4-year track record
- Oracle pricing prevents manipulation liquidations
- Gold and silver perps added in 2026
- Multi-chain (Arbitrum, Avalanche, Base and more)
- No KYC, no account, no minimum deposit
- Fewer trading pairs than competitors (31 on V2)
- Interface more complex than Jupiter
- Anonymous founding team
- Pool-based model means LPs take the other side of trades
- Borrow fees add ongoing cost to open positions
Which DEX is right for you?
The honest answer is that the right platform depends entirely on what you want to do with it. Here is a practical breakdown.
👇 What best describes your goal? Jump to the right platform:
Can you use more than one?
Absolutely. Most experienced DeFi users maintain positions across multiple platforms. A typical setup might be: Jupiter for Solana swaps and DCA, Hyperliquid for active perpetuals trading, and a GMX GM pool position earning yield passively in the background. They serve different purposes and using a combination is entirely sensible.
Hyperliquid, Aster and GMX all offer leveraged perpetuals trading. This means you can borrow against your collateral to take positions much larger than your deposit. Done well, this amplifies profits. Done badly (which is more common), it liquidates your entire position. Do not use leverage until you fully understand how it works, and even then, start with small positions. The 1001x "Degen mode" on Aster is exactly what it sounds like: not suitable for anyone who cannot afford to lose their entire deposit in seconds.
What wallet do you need?
For Hyperliquid and GMX (which run on Ethereum-compatible chains), MetaMask is the standard starting point, or any EVM-compatible wallet. For Jupiter, you need a Solana wallet: Phantom is the most popular and well-regarded option. For Aster, which runs across multiple chains, both MetaMask and Phantom will work depending on which chain you access it from.
For any significant DeFi activity, consider connecting your MetaMask or Phantom to a hardware wallet like a Ledger or Trezor. This means every transaction still requires a physical button press on your hardware device, making it impossible for a malicious website to drain your wallet without your knowledge. Take a look at our hardware wallet guide for UK recommendations.
Category winners: quick reference
Here is the summary for every use case with direct links to get started on each platform.
Frequently asked questions
Do I need to verify my identity (KYC) to use a DEX?
No. None of the platforms in this guide require identity verification. You connect your wallet and start trading. There is no account to create, no email address to provide, and no documents to upload. This is one of the core benefits of decentralised exchanges. You are interacting directly with smart contracts, not with a company that needs to check your identity.
Are DEXs legal to use in the UK?
Yes. Using a DEX is legal in the UK. The FCA's regulations apply to businesses offering crypto services to UK customers, but self-custody DeFi activity through non-custodial protocols sits outside the scope of those regulations. You are responsible for reporting any taxable events to HMRC, but using these platforms is not illegal. The regulatory landscape continues to evolve, so it is worth staying up to date with FCA guidance as the framework develops toward 2027.
What happens if a DEX gets hacked?
Smart contract exploits are a real risk in DeFi, and the impact depends on where your funds are when the exploit occurs. If your funds are in your wallet (not actively in a position or a liquidity pool), they are safe from a smart contract hack. If you have funds in a liquidity pool, perpetuals position, or vault, those are at risk. This is why using audited protocols, keeping most holdings in your own wallet, and not over-concentrating in any single DeFi platform are important habits. All four platforms in this guide have undergone independent security audits.
What is a perpetual contract and how is it different from just buying crypto?
When you buy Bitcoin on Coinbase, you own actual Bitcoin. A perpetual contract is different: you are agreeing to profit or loss based on price movement, without ever owning the underlying asset. You deposit collateral (usually USDC), choose a direction (long for rising prices, short for falling), and your profit or loss is calculated against the contract price. Perpetuals have no expiry date, unlike traditional futures. They also involve leverage, which amplifies both gains and losses. They are a tool for experienced traders, not a starting point for beginners.
How do I pay tax on DeFi activity in the UK?
HMRC treats DeFi activity as taxable in the same way as other crypto transactions. Swapping tokens is a disposal and may trigger Capital Gains Tax if you make a gain. Profits from leveraged trading are similarly subject to CGT. Receiving yield from liquidity provision or staking is usually treated as income. The annual CGT allowance for 2025/26 is £3,000. Use a crypto tax tool like Koinly or Recap that can pull your on-chain transaction history automatically and generate an HMRC-ready report. This is significantly easier than trying to track it manually, especially across multiple chains.
Is it safe to connect my wallet to a DEX?
Connecting your wallet to a legitimate DEX is safe. The connection itself gives the DEX permission to propose transactions, but your wallet must still approve each transaction before it executes. The risk is phishing: fake websites that impersonate legitimate DEXs and ask you to sign transactions that drain your wallet. Always type the URL directly (jup.ag, hyperliquid.xyz, gmx.io, asterdex.com) rather than clicking links in emails, Discord messages or social media posts. Using a hardware wallet as a signer adds an additional layer of protection, since every transaction requires a physical confirmation on the device.
What is the difference between Hyperliquid and Jupiter?
They serve fundamentally different purposes. Hyperliquid is a perpetuals-focused derivatives exchange built on its own blockchain, designed for traders who want professional-grade leveraged trading with the transparency and custody of DeFi. Jupiter is a DEX aggregator built on Solana, designed to find the best swap prices across the Solana ecosystem. Jupiter also offers perpetuals, but its main use case is token swapping and Solana DeFi. If you want to trade leveraged perpetuals at scale, Hyperliquid. If you want to swap Solana tokens cheaply and efficiently, Jupiter.
