DeFi becomes hot due to it's liquidity pool feature. You can earn a passive income by just locking your DeFi coin on a liquidity pool which is a breakthrough.
I list below some DEX that I used that offers this Liquidity pool feature. Take note that the transaction fee in DeFi world right now is a bit high due to growing
transaction volume on ETH blockchain just like what happened during Crypto Kitty since most DeFi coin are on ETH blockchain right now.
Honestly speaking, All exchange offers same profitability rate, It just varies on the amount of transaction process on that exchange. So the more trading volume then more profit for liquidity provider that's why I discuss the exchange feature below since you just need to consider trading volume of exchange to determine profitability of liquidity pool which is self explanatory.
Use this https://www.coingecko.com/en/exchanges/decentralized for tracking the DEX trading volumeUniswap is a fully decentralized protocol for automated liquidity provision on Ethereum. Currently this the most famous DEX right now because this exchange starts the DeFi hype. The only disadvantage that I encounter on this exchange was the transaction was high while the order confirmation was slow because it fully depends on ETH blockchain speed.
Balancer Exchange allow you to swap ERC20 tokens trustlessly across all Balancer’s liquidity pools. Almost same as uniswap, the only difference was they have there own native token called $BAL. All $BAL holders is able to help guide the protocol to its fullest potential. It is not an investment token you should consider that before buying that coin.
DEX Aggregator with the best prices on the market. Achieving best rates by splitting orders among multiple DEXes in one single transaction. So far, This is my FAVORITE DEX for liquidity pool and buying coin. They offer the best of the best price and chepest transaction in all the available DEX exchange. This is my most recommended DEX exchange for newbie in DeFi. You don't need to worry much about price slippage because they display accurate price same as fee.
Mooniswap is a next generation of the AMM exchanges with virtual balances, enabling liquidity providers to capture profits otherwise captured by arbitrageurs. This exchange is created by 1inch exchange which is my current favorite DEX. Mooniswap quotes prices properly unlike on uniswap which you can suffer tremendous loss due to inaccurate price display that result to too much price slippage. The only reason why uniswap is still on the top is because they are the first mover on this industry.
NOTE: There is a lot of upcoming and promising AMM exchange on DeFi. You should always choose exchange that offers cheapest transaction fee and best price.