What is a decentralised exchange?

DEXs have emerged as a new way to trade digital assets, including crypto coins (bitcoin, ethereum, etc.), Non-Fungible Tokens (NFTs, like digital artworks and videogame assets), and utility tokens (which grant user rights or access to a digital service). As the name suggests, DEXs aim to provide a decentralised and potentially much more secure way to trade crypto than, say, funnelling tokens through privately owned exchanges that act as middlemen in every trade.

Though there are some other technical and architectural wrinkles crypto traders should know about, the key difference between traditional exchanges and DEXs is that the latter offers direct peer-to-peer interaction, with no or very limited involvement from a third party. This has some pretty major implications, from privacy (or a lack of oversight) to accessibility (and possible use for criminal purposes) to liquidity (and cryptocurrencies’ stability). Most importantly, the rise of decentralised exchanges could change the way we think about and use blockchain more generally, perhaps broadening the number of use cases in which smart contracts are implemented.

In a way, DEXs can be thought of as the next logical step, taking the decentralised approach that’s so important to users of the crypto ecosystem and applying it to the way that cryptocurrencies actually change hands. In fact, the back-office operations of a DEX are themselves executed and recorded on a public blockchain, which brings the well-known benefits of decentralised ledger technology to the process of exchanging digital assets.

What does all of this mean to a day trader who dabbles in crypto? On a practical level, a trade mutually agreed to on a DEX takes place directly between the wallets of two private users. There is no need to rely on the honesty and efficiency of an intermediary who takes temporary possession of your funds before forwarding them to the recipient. Given that online exchanges have had their share of issues relating to trust and reliability, it’s good to have another option.

Why This Matters for Crypto Traders?

The main driver for the emergence of decentralised crypto exchanges is that, whilst interest in crypto has spiked dramatically in recent years, this has been matched by the amount of fraudulent crypto activity carried out on even well-known exchanges.

Crypto.com, for instance, admitted in early 2022 that over $30 million worth of cryptocurrency had been stolen by hackers, consisting of 4,836 ethereum (ETH) and 443 bitcoin (BTC). Several billions of dollars were lost on Bybit in 2025, though some of the funds were subsequently recovered. Going back a little further, a landmark investigation by Reuters uncovered that a staggering sum of over $4 billions worth of cryptocurrencies were stolen from crypto exchanges between 2011 and 2017 alone. As AI-powered hacking tools expose old vulnerabilities and make new kinds of digital attacks possible, who knows what 2027 might hold?

Since approximately 2013, there have been various attempts to regulate crypto markets on the national level. While any kind of effort on this front is probably a step in the right direction, the different frameworks remain fragmented. It remains to be seen if these untested laws will truly be effective at curbing problems like fraud and money laundering – leaving aside the more philosophical question of whether crypto markets should, and can, be subject to the same scrutiny and regulations as other financial services in the first place.

Even though requiring formal, centralised exchanges to be licensed is possible, the same is just not feasible for individual wallets. DEXs represent a means to avoid the possibility that tighter crypto regulations will impede this rapidly evolving sector. For instance, the outright ban on the use of cryptocurrencies in China and the possibility that other regulators will move in this direction pose a major threat to the whole industry.

It is against this backdrop that DEXs emerged. According to some, they have the potential to overcome one of the last remaining hurdles preventing the mass adoption of cryptocurrencies, namely that trust in the security of digital money is still low across large parts of the population.
This growing distrust is exactly why more traders are turning to a decentralised crypto exchange instead of a centralised platform.

The availability of DEXs is therefore a great resource for crypto users in territories with currently hostile regulations in place. In addition to this, DEXs also safeguard users against the possibility that governments or other central authorities could seize their crypto holdings or impede their ability to conduct transactions. There are some recent precedents, such as when (so far) aggressive, totalitarian states like Russia and Iran were denied access to the SWIFT network, and when Canadian protestors found their bank accounts frozen. The decentralised nature of DEXs would make this kind of sanction impossible to execute.

How Traditional Trading Platforms Work?

On a traditional cryptocurrency exchange, users first deposit funds in the form of either fiat or cryptocurrency. In terms of crypto, this means technically giving up control of their funds. Users can withdraw money if allowed, but it can’t be sent on the blockchain as long as it is deposited. As a user, you no longer hold the private keys needed to access the funds, so you need to ask the exchange to sign off on any transaction on your behalf.

This means transactions are relatively easy to do using the exchange’s online interface, since everything is taking place within their system. As a bonus, they typically offer several trading analysis tools to help traders decide what, how, and when to buy and sell.

The drawback of this approach is simply that you have handed over your money to a third party, and therefore may be at risk of the funds disappearing into the pockets of hackers, tax collectors, or other third parties.

Most of the time, this risk is considered acceptable by the majority of users. Given that most exchanges offer depositor protection (though this is usually privately managed, unlike FDIC-style insurance), it is the same counterparty risk you accept when you deposit your money with any kind of online exchange, whether it supports crypto transactions or not. However, for many users, it’s still something to worry about, leading them to prefer keeping control of their own money.

How does a decentralised exchange work?

Make no mistake: DEXs are much more complex to navigate than traditional exchanges! Their less user-friendly interfaces alone introduce an additional kind of risk, namely that due to operator error.

There are several types of DEX, but the common theme is that orders are executed on-chain via the use of smart contracts. This negates the need for users to hand over custody of their funds to a centralised exchange at any point.
Unlike centralised platforms, a decentralised crypto exchange never takes custody of your funds at any point in the process.

Source: Cryptorobin.com

The most popular type of DEX uses an on-chain order book. Put simply, this means that everything is done on-chain inasmuch as all orders are coded onto the underlying blockchain the DEX uses. This means all transactions are fully transparent, and you don’t need to rely on an intermediary playing referee between you and the other party in each trade.

This approach is, however, quite cumbersome and resource-intensive. The requirement for every node on the network to record each transaction means fees are often charged and then used to incentivise users to offer their processing power to the blockchain. Examples of on-chain order book models include the Stellar and Binance DEXs.

In order to circumvent this limitation, so-called off-chain DEXs are also available. When using these, the whole operation is slightly more centralised than is the case in an on-chain DEX. Essentially, instead of every order being posted to the blockchain, they’re hosted on someone’s server, making the exchange somewhat more like the traditional model outlined above. However, at least in a technical sense, a wallet connection serves as sufficient proof of a user’s identity – off-chain DEXs do not necessarily have to comply with Know-Your-Customer (KYC) legislation that other financial platforms are subject to.

Finally, there are Automated Market Makers (AMMs), which are usually not stand-alone DEXs but a functionality incorporated in their platforms. Essentially, AMMS are effectively complex algorithms that improve liquidity and further reduce the need for an intermediary in online transactions. Although the back-end mathematics may be quite complicated, the front-end user experience is fairly smooth, a notable example being Trust Wallet.

What are the advantages of a decentralised exchange?

A major reason some people may want to use DEXs is that KYC/AML regulations are simpler or irrelevant to these platforms. Instead of individuals having to submit identity documentation and proofs of address, DEXs are essentially permissionless environments. Aside from the information required to actually conduct transactions, identity checks are not needed. This, for some, solves serious privacy and data-sharing concerns, as well as accessibility issues for other users like those located in countries where crypto is frowned upon. All you need to make an exchange is an active cryptocurrency wallet, and this feature appeals to the smart, criminally minded, or paranoid, depending on who you ask.

Secondly, counterparty risk is limited. Since DEXs don’t hold customers’ funds, hacking and other forms of external interference aren’t a threat. The not-so-distant collapse and subsequent bankruptcy of Mt. Gox back in 2014 is still fresh in many crypto users’ memories, making DEXs seem like a more secure option.

Finally, the availability of unlisted tokens attracts some traders to DEXs. Highly specialised tokens that aren’t listed on centralised exchanges can be found on DEXs, making them a hot spot for serious blockchain and crypto aficionados who trade these niche securities. One top DEX, Uniswap, has more than 5,000 tokens available on its platform, many of which can’t easily be traded elsewhere.

What are the drawbacks of a decentralised exchange?

As has already been mentioned, DEXs aren’t known for their ease of use. Those new to the crypto space will almost certainly find that any DEX takes more time to get used to than the online interface of a traditional exchange.

Secondly, there are some issues around trading volumes and the liquidity of certain digital assets. The highly specialist nature of some of the tokens available on DEXs necessarily means limited trading volumes. Buying and selling may take longer than anticipated, and prices can move very sharply in either direction while you’re waiting for an order to be filled.

Finally, fees may be higher on DEXs, simply because distributed processing power is required to complete your order. This problem is exacerbated when the network is overloaded or if you’re using an on-chain order book.

Best DEXs to explore

Here are five popular decentralised crypto exchanges worth exploring.
Here are five of the most established decentralised crypto exchanges worth exploring, in no particular order and without any specific recommendation from us:

Curve (CRV)

Curve runs on ethereum and is an on-chain DEX. It currently has a total value of assets listed at around $21 billion.

Uniswap (UNI)

Uniswap is another on-chain DEX for Ethereum, with a total asset value of $9 billion.

PancakeSwap (CAKE)

PancakeSwap is an automated market maker running on the Binance Smart Chain with assets totalling around $7.7billion.

SushiSwap (SUSHI)

SushiSwap is a decentralised protocol for providing automated liquidity on ethereum. It currently has listed assets of nearly $5.5 billion.

Balancer (BAL)

Balancer is a decentralised automated portfolio manager and trading platform for cryptocurrencies, with total assets standing at $3 billion.