Ren, previously known as the Republic Protocol, is a decentralized dark pool exchange protocol; designed to support large volume trades, without effecting the prices of the assets being traded. The blockchain-based, dark pool protocol has built in privacy mechanisms and is provably fair. It uses secure multi-party computation (sMPC), and a network of Darknodes, to match orders without exposing their volume or price. Their private order book will also enable cross-chain trades of tokenized assets. The Singapore based company is also developing RenX, a decentralized dark pool exchange, built with the Republic Protocol. REN is the network's utility token. It provides security to the network, and is staked to enable the operation of a Darknode in the network.

Newdex is the first EOS based decentralized exchange. It's built on the EOS main chain and uses an off-chain matching mechanism to pair buyers and sellers. Newdex was hacked in September 2018, and lost around $58,000 worth of cryptocurrencies. Trading fees are 0.1%.

PancakeSwap is a decentralized exchange built on the Binance blockchain. It allows users to stake their funds in return for the protocol’s tokens, and uses an automated market maker (AMM) model to enable users to trade BEP-20 tokens on the platform without an order book. PancakeSwap is similar to Uniswap and SushiSwap, and rewards users for depositing funds to the liquidity pool with PancakeSwap tokens that entitle holders to a portion of the trading fees generated on the platform.