CEX vs DEX: Centralised vs Decentralised Exchanges
Not all crypto exchanges work the same way. They split into two families — centralised (CEX) and decentralised (DEX) — and the difference comes down to one question: who holds your money while you trade? Here is how they compare and when to use each.
Key takeaways
- CEX = a company holds your funds and runs the exchange (Kraken, Binance, Coinbase-style). Easy, supported, KYC required.
- DEX = you trade directly from your own wallet via smart contracts. Full control, no sign-up, but no safety net.
- Most people start on a CEX and use a DEX for things a CEX cannot offer.
Centralised exchanges (CEX)
A CEX is a company that operates the exchange and holds your crypto for you while you use it — much like a bank or a stockbroking app. You sign up, verify your identity (KYC), deposit fiat or crypto, and trade through a polished app. The major exchanges are all CEXes.
Strengths: easy to use, customer support, simple fiat on-ramps, deep liquidity, and recovery options if you forget a password. Trade-offs: you do not hold your own keys ("not your keys, not your coins"), you must complete KYC, and you are trusting the company's security and solvency.
Decentralised exchanges (DEX)
A DEX is not a company holding your funds — it is a set of smart contracts that let you swap tokens directly from your own wallet. There is no sign-up and usually no KYC. You connect a self-custody wallet, approve the trade, and it executes on-chain.
Strengths: you keep custody the whole time, you can access newer or niche tokens long before they hit big exchanges, and anyone can use one. Trade-offs: no support desk, no password reset, exposure to smart-contract bugs and scam tokens, and a steeper learning curve. DEXes are part of the wider world of DeFi.
When to use each
- Use a CEX to buy crypto with fiat, for everyday trading, and as a beginner. It is simpler and safer for most people.
- Use a DEX when you want to keep custody, access a token not listed on big exchanges, or interact with DeFi — ideally with a separate wallet holding only what you can afford to lose.
Some platforms blur the line: OKX, for example, pairs a full centralised exchange with a built-in self-custody Web3 wallet, letting you do both from one app — see our OKX review.
The bottom line
Most people should start on a reputable CEX and, once comfortable, explore a DEX for what centralised platforms cannot offer. Whichever you use, remember: on a CEX your safety depends on the company; on a DEX it depends entirely on you.
Frequently asked questions
Is a CEX or DEX better for beginners?
A centralised exchange (CEX) is far friendlier for beginners: an app, customer support, easy fiat deposits and a familiar sign-up. Decentralised exchanges (DEXes) offer more control and access to newer tokens but assume you can manage a self-custody wallet and there is no support if something goes wrong.
Do decentralised exchanges require KYC?
Generally no — most DEXes let you trade directly from your wallet without identity verification, because there is no company holding your funds. Centralised exchanges, by contrast, must verify your identity to comply with regulations.
Related reading
This article is general information for Australian and global crypto users, not financial, tax or legal advice. Crypto is volatile and you can lose money. Always do your own research and, where relevant, speak to a licensed adviser or registered tax agent. We may earn a commission from some links, at no cost to you — it never changes what we recommend.