Uniswap is an open source, decentralized crypto exchange. It was build on Ethereum blockchain and allows anyone to trade ERC-20 tokens without the use of middle man. It is the most popular decentralized application (Dapp) on the Ethereum platform. Uniswap is an automated liquidity protocol, which means that a standard smart contract template are set up in order to create liquidity pools and corresponding markets that well suited with each other. This system will eliminate the need of buyer or seller to wait for another party to complete a transaction, allowing fast and efficient trading. Uniswap was created on November 2018 and has improved from version to version. The highlight for each version are shown below:

Uniswap V1: Trading ETH to ERC-20 tokens only
Uniswap V2: Able to trade ERC-20 tokens directly with another ERC-20 tokens
Uniswap V3: Provides increased capital efficiency and fine-tuned control to liquidity providers

UNI is the default token for Uniswap and was airdropped on September 2020 to Uniswap users. It is a governance token that allows holders to vote or influence on future development decisions. 

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Andreessen Horowitz, Spark Capital, NON-fungible Chan, Rockaway Blockchain Fund, SV Angel, A.Capital Ventures, Version One Ventures, ParaFi Capital, Variant Alternative Income Fund, Union Square Ventures.