Three Types of Crypto currency exchange

1.Centralized Exchange(CEX)

Example –
1) https://zebpay.com/in/
2) https://wazirx.com/
3) https://coinswitch.co/
4) https://www.unocoin.com/in
5) https://coindcx.com/

2. Decentralized Exchange(DEX)

Example –

1) https://metamask.io/
2) https://trustwallet.com/
3) https://www.coinbase.com/

2. Hybrid – Combination of Centralized+Decentralized Exchange