Decentralized exchanges are platforms that allow direct peer-to-peer cryptocurrency transactions online safely and without intermediaries.
Unlike centralized exchanges, decentralized platforms do not require trust management, that is, the user retains control over their funds and interacts with the protocol directly.
Rubic
Decentralized aggregators are platforms that use the liquidity of multiple exchanges for the best possible exchange offer.
Aggregators can work with one blockchain, or they can make exchanges between different blockchains, for example, on the Rubic aggregator, you can exchange BTC for BNB.
Aggregators work on the principle of decentralized exchanges, so transactions, thanks to the use of smart contracts, are carried out online without intermediaries.
Azbit
A centralized exchange (CEX) is a platform where users can buy, sell or trade cryptocurrencies.
The exchange is called "centralized" because it is owned and operated by a third-party service.
The exchange administration is responsible for conducting transactions, maintaining user accounts, security and customer support.