How Do Centralized Exchanges Work?
Centralized exchanges like Coinbase, Kraken, and Binance function similarly to stock brokerages. You create an account, complete identity verification (KYC), deposit funds, and place orders matched through an order book. The exchange holds your assets in custodial wallets, provides customer support, and handles regulatory compliance. CEXs typically offer fiat on-ramps, advanced trading tools, and higher liquidity — but you must trust the company with your funds.
How Do Decentralized Exchanges Work?
Decentralized exchanges like Uniswap, Curve, and dYdX operate through smart contracts on blockchains. You connect your own wallet, trade against liquidity pools rather than order books, and maintain custody of your funds throughout the process. No account creation or identity verification is required. DEXs offer greater privacy and self-sovereignty but typically have less liquidity, higher learning curves, and no customer support or fiat on-ramps.
Which Type Should You Use?
A widely recommended approach is to evaluate based on priorities. CEXs offer easy fiat deposits and withdrawals, customer support, advanced order types, and regulatory protections. DEXs offer privacy, self-custody, access to newer tokens, and censorship resistance. Many experienced users use both: a CEX for fiat on/off-ramps and a DEX for DeFi trading and accessing tokens not listed on centralized platforms. Many professionals suggest avoiding keeping large amounts on a CEX long-term.
Frequently asked questions
Are DEXs safer than CEXs?
DEXs eliminate exchange custody risk (you control your keys), but introduce smart contract risk. CEXs can be hacked or go bankrupt (like FTX), but offer recovery options and insurance. Neither is universally safer — they carry different types of risk.
Do DEXs charge lower fees?
DEX trading fees (typically 0.3% per swap) are often comparable to CEX fees. However, DEX users also pay blockchain gas fees, which can be significant on Ethereum. On Layer-2 networks or alternative blockchains, total DEX costs can be lower than CEX trading fees.