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An exchange lets you buy or sell crypto. There are two main kinds: centralized exchanges (CEXs) and decentralized exchanges (DEXs). Both let you trade crypto — but how they do it, and who’s in control, is very different.
CEXs are run by companies. You create an account and they provide the space for you to buy and sell crypto — think of them as a bank for digital assets.
DEXs don’t have a company behind them. They’re powered by smart contracts — bits of code that connect traders directly. To use one, you’ll need your own crypto wallet. More on this later.
The technology that powers the blockchain is different from the technology behind exchanges — they’re separate systems. The blockchain records transactions across a network, while exchanges are platforms built on top of that technology.
CEXs hold your crypto for you, making them faster and easier to use with familiar payment methods.
On a DEX, you’re in charge — but also responsible for every step. Both types of exchanges are secure, just in different ways.
Trades on DEXs happen on the blockchain.
CEX transactions happen off-chain, more like a bank’s system, where the company keeps track of who owns what behind the scenes and updates your balance for you.
Centralized exchanges handle security, payments, and support — perfect if you’re new. You can buy crypto using your regular card or bank account, and if something goes wrong, there’s help.