Centralized vs. Decentralized Exchanges
How CEXs and DEXs differ in custody, mechanics, and typical trade-offs.
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What to remember
- CEXs are company-operated and typically hold user funds in custody.
- DEXs run on smart contracts and let users retain self-custody.
- Trade-offs include onboarding ease, asset availability, and recourse if something goes wrong.
- Many people use both types of exchange for different purposes.
Centralized exchanges (CEXs)
A centralized exchange is a company-operated platform that matches buyers and sellers, typically holding user funds in its own custody. It generally offers a familiar order-book trading experience, fiat on/off-ramps, and customer support.
Decentralized exchanges (DEXs)
A decentralized exchange runs primarily through smart contracts, letting users trade directly from their own self-custody wallets rather than depositing funds with a company. Many DEXs use an automated-market-maker model with liquidity pools rather than a traditional order book.
Centralized Exchange (CEX)
Decentralized Exchange (DEX)
Who holds custody while a trade happens, and where it executes, on a centralized exchange versus a decentralized exchange.
Key trade-offs
- Custody: a CEX holds your funds on your behalf; a DEX lets you keep custody yourself.
- Onboarding: CEXs commonly offer direct fiat purchases; DEXs generally require you to already hold crypto in a wallet.
- Asset availability: CEXs curate which assets are listed; many DEXs allow trading any compatible token, including newer or more obscure ones, without a listing process.
- Recourse: a CEX has a support team and account-recovery processes; a DEX transaction, once confirmed, generally cannot be reversed by anyone.
Neither is universally "better"
CEXs and DEXs suit different needs — ease of onboarding and support versus self-custody and broader asset access. Many people use both, depending on the specific task.
What to remember
- CEXs are company-operated and typically hold user funds in custody.
- DEXs run on smart contracts and let users retain self-custody.
- Trade-offs include onboarding ease, asset availability, and recourse if something goes wrong.
- Many people use both types of exchange for different purposes.